A new species of Trimma is described from South-West Islands of Palau. Trimma hamartium n. sp. lacks scales on the cheeks and opercle, has 8–9 scales in the predorsal midline, 17–19 pectoral-fin rays with 5–10 branched rays in the middle of the fin, an unbranched 5th pelvic-fin ray that is 51–64% the length of the 4th ray, 17–19 gill rakers on the outer surface of the first gill arch, an U-shaped interorbital trench with a narrow, slit-like postorbital trench ending at the last papilla in row p, and has 6 papillae in row c beneath the eye. When freshly collected, the species is very similar in appearance to T. preclarum, with which it is syntopic at three of the more northern islands of the South-West Islands.
Keywords: Pisces, taxonomy, Western Pacific, coral reef gobies, COI gene
Richard Winterbottom. 2018. A New Species of Trimma (Pisces; Gobiidae) from the South-West Islands of Palau, western Pacific Ocean. Zootaxa. 4370(2); 123–136. DOI: 10.11646/zootaxa.4370.2.2
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ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
Five new species belonging to the gobiid fish genus Grallenia of the tropical western Pacific Ocean are described from sand-bottom habitats. Grallenia compta n. sp. (11 specimens, 14.9–17.3 mm SL) from Milne Bay Province, Papua New Guinea and Grallenia rubrilineata n. sp. (81 specimens, 8.8–15.8 mm SL) from Luzon, Philippines share a suite of features that comprises an absence of cephalic sensory-canal pores, a rectangular first dorsal fin without a filamentous extension of the first spine, and the anterior and posterior scales separated by a scaleless gap, with 15–22 longitudinal scales in the posterior series. The two species differ from each other in dorsal- and anal fin-ray counts (8–9 for G. compta n. sp. vs. 9–11, usually 10, for G. rubrilineata n. sp.), scalation patterns, and coloration. A third new species,Grallenia dimorpha n. sp. (34 specimens, 9.8–16.7 mm SL) from Papua New Guinea is similar, except it has a continuous series of longitudinal scales without a gap, and females possess a triangular first dorsal fin featuring a filamentous extension of the first spine. The last two species, Grallenia lauensis n. sp. (two females, 11.1–11.4 mm SL) and Grallenia solomonensis n. sp. (three females, 11.4–12.5 mm SL), are described from Fiji and the Solomon Islands, respectively. They exhibit similar diagnostic features including the presence of cephalic sensory-canal pores, usually 7 segmented dorsal- and anal-fin rays, and most body scales restricted to the caudal peduncle. Grallenia solomonensis n. sp. differs from G. lauensis n. sp. in having several mid-lateral scales immediately behind the pectoral-fin base (vs. none), 16 (vs. 15) pectoral-fin rays, pelvic-fin rays with 2–3 branch points (vs. a single point), and a truncate (vs. slightly emarginate) caudal fin. An additional 33 non-type specimens, 7.0–15.6 mm SL, from Australia (southern Great Barrier Reef and northwestern Coral Sea) are provisionally identified as G. lauensis n. sp. However, at least some Australian specimens differ slightly in possessing branched segmented dorsal-fin rays and pelvic-fin rays with more than one branch point. Although fins are damaged in most specimens, two Australian males exhibit a long, filamentous first dorsal-fin spine.
Etymology. The species is named compta (Latin: ornamented), with reference to the orange markings on the head, body, and fins. It is treated as a feminine singular adjective.
Distribution and habitat. The new species is currently known only from Sideia Island in Milne Bay Province of Papua New Guinea (Fig. 6), but is no doubt more widespread in this large marine province. The habitat consists of large (5–10 m2 ), flat, sandy areas surrounded by live coral, in depths of about 14–15 m.
Figure 5: Adult males of species of Grallenia: A) G. compta; B) G. dimorpha; C) G. rubrilineata (G.R. Allen & M.V. Erdmann).
Figure 10. Grallenia dimorpha, male (upper) and female (lower), approx. 15 mm SL, underwater photographs in 16 m, White Island, West New Britain Province, Papua New Guinea (G.R. Allen).
Grallenia dimorpha, n. sp.
Dimorphic Goby
Etymology. The species is named dimorpha (Latin: two shapes) with reference to the sexual dimorphism in relation to dorsal-fin shape. It is treated as a feminine singular adjective.
Distribution and habitat. The new species is currently known only from Papua New Guinea (Fig. 6). The type series was collected off the southern coast of New Britain Island and the non-type specimens from the vicinity of Madang and near Port Moresby. The habitat consists of sandy substrate in about 8–18 m.
Figure 14. Grallenia lauensis, female, approx. 11 mm SL, underwater photographs in 30–35 m, Lau Archipelago, Fiji (M.V. Erdmann).
Grallenia lauensis, n. sp.
Lau Goby
Etymology. The species is named lauensis with reference to the Lau Archipelago type locality.
Distribution and habitat. The new species is currently known from the southern Lau Archipelago of southeastern Fiji and 33 non-type specimens from the Great Barrier Reef and northwestern Coral Sea. The Lau habitat consists of extensive gradual slopes of clean white sand in 30–35m depth. Both Lau sites were located in channel passes from the outer reef to extensive inner lagoons, and were hence subject to frequent strong currents and high rates of water exchange.
Figure 18. Grallenia rubrilineata, male (right), female (center), and juvenile (left) approx. 8–15 mm SL, underwater photograph in 15 m, Ligpo Island near Anilao, Batangas Province, Philippines (G.R. Allen).
Grallenia rubrilineata, n. sp.
Redstripe Goby
Etymology. The species is named rubrilineata (Latin: “red-lined” or “red-striped”), with reference to the characteristic marking on the dorsal fin of adult males. It is treated as a feminine compound adjective.
Distribution and habitat. The new species is currently known from the Philippines, including the type locality near Anilao in Batangas Province, Luzon, and on the basis of a photograph from Dauin, Negros in the Central Visayas Group. A female specimen examined at WAM (P.30410-015), 18 mm SL, from Bohaydulong Island, Sabah State, Malaysia is probably G. rubrilineata, judging from fin-ray counts, scale pattern, and lack of head pores; however, additional specimens, including males, would be required to verify this identification. The habitat at Anilao consists of extensive areas of sand/silt substrate in about 12–15 m. The new species was very abundant in some areas, including the type locality, with an estimated abundance of 10–15 individuals per square meter. It was typically seen in small groups.
Grallenia solomonensis, n. sp.
Solomons Goby
Etymology. The species is named solomonensis with reference to the Solomon Islands type locality.
Gerald R. Allen and Mark V. Erdmann. 2017. Description of Five New Species of Marine Gobies (Teleostei: Gobiidae) of the Genus Grallenia from the tropical western Pacific Ocean. Journal of the Ocean Science Foundation.27; 20–47. http://www.oceansciencefoundation.org/josf27c.html
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رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
Three species of Schismatogobius de Beaufort 1912, distinguished by their morphology and mitochondrial DNA sequences, were found in freshwater streams in the Ryukyu Archipelago, Japan. Although two species were previously known from Japan (S. roxasi Herre 1936 and S. ampluvinculus Chen, Shao, and Fang 1995), the taxonomy needs to be revised. To identify these species, the holotype morphology of S. marmoratus (Peters 1868), S. bruynisi de Beaufort 1912, and S. roxasi, originally described from the Philippines and Indonesia, were examined and re-described here, because relatively little information about their diagnostic characters was provided in the original descriptions. The three Japanese species were identified as S. ampluvinculus, S. marmoratus, and a new species. They were distinguished from each other and from their congeners by the banding pattern of the body, markings on the pectoral fins, pigment patterns on the ventral surface of the head and pelvic fin, body depth at the pelvic-fin origin, pre-anal length, and pectoral-fin ray counts. Although the new species had been regarded as S. roxasi in previous publications, we show that it is actually not S. roxasi and that it also differs from all other nominal species of Schismatogobius. This is described as a new species, Schismatogobius ninja. Additionally, this is the first record of S. marmoratus from Japan.
Keywords: Schismatogobius, Gobiidae, New species, Mitochondrial genome, Ryukyu Archipelago
Fig. 7: Schismatogobius ninja sp. nov. immediately after fixation. a NSMT-P 127395, holotype (male, 30.4 mm SL), b URM-P 48711, paratype (male, 21.5 mm SL), c NSMT-P 127408, paratype (female, 21.8 mm SL), d NSMT-P 127400, paratype (19.6 mm SL) (photo by K. Maeda)
Schismatogobius ninja Maeda, Saeki, and Satoh, sp. nov.
(Japanese name: Eso-haze)
Diagnosis. The new species is distinguished by a combination of the following characters: pectoral-fin rays 15–16 (usually 15); body relatively slender (depth at pelvic-fin origin 16.9–19.5% of SL); trunk relatively short (pre-dorsal length 35.5–39.1% of SL; pre-anal length 53.2–56.7% of SL; pre-anal-fin length 58.4–61.0% of SL; length of second dorsal-fin base 26.5–29.0% of SL; length of anal-fin base 22.3–25.9% of SL); two dark brown, transverse bands on posterior half of the body; pectoral fin with 1–5 black spots along each ray; pectoral fin often with one large, black vertical blotch on upper part, but blotch not extending to distal part; isthmus and gular region almost cream or white, often with some melanophores, but not densely pigmented; pelvic fin usually almost without pigmentation, but often lightly pigmented in larger males.
Distribution. All specimens described here with mitochondrial DNA sequences were collected from Okinawa Island in the Ryukyu Archipelago. Thirty-five non-type specimens collected from Okinawa, Ishigaki, and Iriomote islands were also identified as the new species, Schismatogobius ninja. Many authors reported “eso-haze” (regarded as Schismatogobius roxasi) in Japan and the range often included Amami-oshima Island, in addition to Okinawa, Ishigaki, and Iriomote islands (Yoshigou 2014). These records need to be verified by reexamination of the specimens. This species seems to have often been misidentified as “Schismatogobius ampluvinculus” (see Distribution section of S. ampluvinculus). In conclusion, the verified localities of S. ninja in Japan are Okinawa, Ishigaki, and Iriomote islands, but it may be found on some other islands in the Ryukyu Archipelago.
Ecology. All specimens were collected from the lower freshwater reaches of the streams, at 50 to 1,300 m from the upper limit of tidal fluctuations. This species was found on coarse sand and gravel bottoms of shallow areas (depth usually 5–30 cm) around rapids. Typical habitat was at the ends of the rapids (transitional areas from rapid to pool) with steady flow. These gobies usually stay on the bottom and often bury half of their body in the substratum (Fig. 10e). They prefer substrates with free gravel granules which can be moved easily by water flow, and they do not inhabit silty substrates. Body markings perfectly camouflage them on the gravel bottom of their habitats (Fig. 10e); therefore, they are hard to detect if they remain motionless.
Schismatogobius ninja is often found with S. ampluvinculus, and sometimes with Schismatogobius marmoratus. The most abundant syntopic species was Rhinogobius nagoyae Jordan and Seale 1906. Other gobies, such as Stiphodon percnopterygionus Watson and Chen 1998, Sicyopterus lagocephalus (Pallas 1770), Glossogobius illimis Hoese and Allen 2012, and Luciogobius ryukyuensis Chen, Suzuki, and Senou 2008 and amphidromous pipefish, Microphis leiaspis (Bleeker 1854), were also frequently observed with Schismatogobius ninja.
Etymology. Although the new species shows attractive coloration when viewed against a simple background, they are very cryptic against the gravel substrates of their habitats. The stealthy capacity of this species reminds us of Japanese “ninja,” which were known as masters of camouflage. Therefore, the new species is named Schismatogobius ninja. The new specific name is a noun in apposition.
Fig. 10: Live Schismatogobius ninja sp. nov. observed in streams on Okinawa Island (a, d, e 16 Mar. 2015; b 11 Oct. 2010; c 16 June 2008) (photos by K. Maeda)
Taxonomy of Japanese species
Schismatogobius ninja Maeda, Saeki, and Satoh, sp. nov.
(Japanese name: Eso-haze)
Schismatogobius ampluvinculus Chen, Shao, and Fang 1995
(Japanese name: Shima-eso-haze)
Schismatogobius marmoratus (Peters,1868)
(New Japanese name: Kaeru-eso-haze)
Fig. 13 Live Schismatogobius ampluvinculus observed in streams on Okinawa Island (a 16 June 2015, c 13 Aug. 2015) and Iriomote Island (b 10 Aug. 2006), and Schismatogobius marmoratus observed in streams on Okinawa Island (d, e 16 Mar. 2015; f 29 Aug. 2009) (photos by K. Maeda)
Ken Maeda, Toshifumi Saeki, Chuya Shinzato, Ryo Koyanagi and Nori Satoh. 2017. Review of Schismatogobius (Gobiidae) from Japan, with the Description of A New Species. Ichthyological Research. xx; 1–22. DOI: 10.1007/s10228-017-0593-4
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شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
A new species of deep-reef fish in the goby genus Palatogobius is described from recent submersible collections off Curaçao and Dominica. Video footage of schools of this species reveal predation by the invasive Indo-Pacific lionfish (Pterois spp.), the first record of undescribed fauna potentially being eaten by lionfish outside of its native range. We present molecular phylogenetic data for all valid species of Palatogobius and related genera, as well as a taxonomic key to the species of Palatogobius and a generic key to Palatogobius and related genera in the western Atlantic. Lastly, we discuss ecological and behavioral aspects of some deep-reef fishes in light of potential threats from invasive lionfish.
Fig 2. Palatogobius incendius, live in aquarium, USNM 415430, 18.3 mm SL, Curacao. Photo by Barry Brown.
Fig 1. Palatogobius incendius, prior to preservation. A) USNM 436470, tissue CUR15135, 19 mm SL, Curacao; B) USNM 436483, tissue CUR15148, 21 mm SL, Curacao; C) USNM 431354, tissue CUR14029, 22 mm SL, Curacao; D) USNM 435318, 18.1 mm, Curacao. Photos by Carole C. Baldwin.
Palatogobius incendius Tornabene, D. Ross Robertson & Baldwin, sp. nov.
Diagnosis: Side of body with yellow/orange stripe along lateral midline, stripe continuing onto and extending entire length of caudal fin; second dorsal fin I,14–16; anal fin I,14–17; pectoral fin 18–20; no teeth on vomer; body scales absent except for occasionally 2 to 3 cycloid scales on base of caudal fin; interorbital pore C absent; interorbital pores D paired; eye diameter 7.0–9.0% SL.
Etymology: The specific epithet incendius is an adjective formed from the Latin root incendium meaning ‘fire.’ The scientific and proposed common names refer to the bright orange, yellow and reddish-pink coloration on the body, head and fins.
Fig 6. School of Palatogobius incendius at type locality, sta. CURASUB15-30, 152 m depth, Curacao.
Habitat and distribution: Palatogobius incendius has been collected on deep reefs from Curacao (119–128 m) and Dominica (88–168 m) and observed off Roatan, Honduras (94–201 m). The species occurs exclusively in hovering schools ranging in size from as small as 5 to 10 individuals (rare) to 50->200 individuals (Fig 6). Schools are most frequently found at the top or bottom of vertical walls off Curaçao and Dominica, but off Roatan we observed more than a dozen schools of P. incendius collectively comprising as many as 1000 individuals over a long, gradually inclining stretch of sand and small rocks from ~150–170 m depth. Over this stretch, P. incendius co-occurred with many individuals of P. grandoculus, which were closer to the bottom rather than hovering well off the bottom like P. incendius. Schools of P. incendius generally comprise individuals at multiple life stages, ranging from moderately developed larvae (~9 mm SL) to adults. Off Dominica we also observed larger swarms of minuscule fish (~5 mm TL) that could possibly be very recently recruited P. incendius larvae, given their size, abundance and depth range. Individuals in these swarms were too small to be captured, and were observed traveling only a few cm off the bottom rather than hovering in a cloud well above the substrate. These schools of post-larvae were 1–2 m wide and up to 5 m long, and moved steadily upslope at approximately 0.15 m/s, navigating laterally around obstacles in a fashion superficially similar to a wide chain of marching army ants.
Luke Tornabene and Carole C. Baldwin. 2017. A New Mesophotic Goby, Palatogobius incendius (Teleostei: Gobiidae), and the First Record of Invasive Lionfish Preying on Undescribed Biodiversity. PLoS ONE. 12(5): e0177179. DOI: 10.1371/journal.pone.0177179
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شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
A new species of Pseudogobiopsis is described, solving the identity of a goby from Java in a Kuhl and van Hasselt painting from Java. The species reached the European aquarium trade since at least 2001 but its identity had remained unknown due to lack of preserved, scientific specimens. Recent collections in Sumatra and Java included specimens of this new goby, which resembles P. oligactis. A revised key to the species of the genus is provided.
Key words. Gobiidae, Gobionellinae, Pseudogobiopsis, new species
Pseudogobiopsis lumbantobing n. sp.
Diagnosis. A moderately slender Pseudogobiopsis with second dorsal-fin rays always I,6; anal-fin rays always I,6; pectoral-fin rays 17–18; longitudinal scales 21–24; TRB 6–8; predorsal scales 5–6, large, reaching up to close behind eyes; jaws enlarged in male; three preopercular pores present, posterior portion of oculoscapular canal present, but no canal or pores over opercle; most scales on body ctenoid; first spine of dorsal fin longest in both sexes, greatly elongate in males; five elongate dark blotches along midside of body, with five indistinct dusky short saddles crossing dorsum, black spot behind anus and four internal black blotches along midventral line, commencing at anal fin origin, black spot on upper part of pectoral fin base and chin with blackish mental frenum.
Distribution. Known only from freshwater drainages of western Sumatra and western Java, Indonesia. Some specimens in the aquarium trade are said to be imported from Myanmar (Fig. 3), but this is yet to be confirmed.
Ecology. Freshwater, found in rivers and streams at altitudes of 5–22 m, with a substratum of sand, gravel, rock and boulders; algae and aquatic macrophytes may be present (Figs. 8, 9).
Etymology. This species is named for Daniel Lumbantobing of Jakarta, who collected the first specimens and showed them to HKL in 2012, which solved the mystery of the orange-spotted goby of which aquarists had been sending her photos. Daniel is an ichthyologist who specialises in freshwater fishes. Name used as a name in apposition.
Helen K. Larson, Renny K. Hadiaty and Nicolas Hubert. 2017. A New Species of the Gobiid Fish Genus Pseudogobiopsis (Teleostei, Gobiidae, Gobionellinae) from Indonesia. RAFFLES BULLETIN OF ZOOLOGY.65: 175–180.
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شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
A new species of the gobiid genus Gobius (Gobiidae, Perciformes),Gobius incognitus sp. nov. is described from the Mediterranean Sea, and its most morphologically similar species Gobius bucchichi is redescribed. The new species is distinguished from its congeners by: scales in lateral series 51–59; predorsal scales 25–35; opercle scaled in adults with 10–16 scales present; pectoral fin with ray count 18–20 and free tips on upper rays well developed and on the first ray longer than two thirds of the entire ray length; pelvic disc complete and with well-developed anterior membrane without lateral lobes; anterior oculoscapular canal with pore α at rear of orbit; oculoscapular row x1 not extending forwards to pore β; suborbital row d discontinuous with large gap below suborbital rows 3 and 4; eye diameter 1·08–1·32 in snout length; by pigment rows on cheek and pigmentation on pectoral-fin base.
Figure 1. Gobiusincognitus sp. nov. (a) preserved holotype, NMP P6V 141129, male, 67·0 + 16·4 mm standard length + caudal-fin length, France, Gulf of Lyon, Banyuls-sur-Mer and (b) live specimen, NMP P6V 141128, male, 59·3 + 14·2 mm, France, Gulf of Lyon, Banyuls-sur-Mer.
Diagnosis: Gobius incognitus sp. nov. is unique among species of Gobius by the following combination of characteristics: (1) LL 51–59; (2) PD 25–35; (3) opercle scaled in adults with 10–16 scales present; (4) P count 18–20; (5) free tips on upper P rays well developed and the first ray longer than two thirds of the entire ray length; (6) V disc complete; (7) V disc anterior membrane without lateral lobes; (8) anterior oculoscapular canal with pore α at rear of orbit; (9) oculoscapular row x1 not extending forwards to pore β; (10) suborbital row d discontinuous with large gap below suborbital rows 3 and 4; (11) eye diameter 1·08–1·32 in snout length; (12) the pigment dots on cheek irregularly scattered or, if rows are visible, then additional dots or a third row present across the middle of the cheek between the lower row starting anteriorly at the angle of mouth and the upper row that touches ventral margin of eye; (13) the upper mark on the P base single or doubled, reaching downwards to eighth to 10th rays counting from the upper part of fin.
Etymology: The species name is from the Latin incognitus meaning unknown in reference to the long period of time that passed until this common and widespread species was recognized and described.
Ecological and geographical distribution: The species was collected in the north, middle and south Adriatic Sea, in the north-western Mediterranean in France, Banyuls-sur-Mer and in the eastern Mediterranean at Crete Island and in Israel (Fig. 3).
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M. Kovačić and R. Šanda. 2016. A New Species of Gobius (Perciformes: Gobiidae) from the Mediterranean Sea and the Redescription of Gobius bucchichi.
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
A new miniature species of gobiid fish,Psammogobius pisinnus n. sp., is described from West New Britain Province, Papua New Guinea on the basis of 10 specimens, 10.8–17.9 mm SL. Diagnostic features include dorsal-fin rays VI + I,9 (rarely I,10), the third dorsal-fin spine sometimes with a short, filamentous extension; anal-fin rays I,9 (rarely I,8); pectoral-fin rays 16–19 (usually 17); the pelvic fins reaching the anal-fin origin; the pelvic frenum weakly developed; longitudinal scales 25–28; the tongue distinctly bilobed, and a live color pattern that is generally light gray to whitish with three broad brown saddles on the dorsal half of the body. The new species differs from the three previously described species of Psammogobius (P. biocellatus, P. knysnaensis, and P. viet) on the basis of its tiny adult size (less than 20 mm vs, about 70–80 mm SL), fully marine habitat (vs. brackish estuaries and tidal streams), possession of cheek and opercular scales (scaleless in other species, except P. biocellatus with scales on the upper portion of the opercle), only 5–7 predorsal scales (vs. 10–16), and color pattern. The new species is also reported from the northern Great Barrier Reef of Australia on the basis of a single specimen.
Figure 3. Psammogobius pisinnus, underwater photographs, approx. 13–17 mm SL, all West New Britain Province, Papua New Guinea (G.R. Allen), except lower right taken at Flynn Reef, Great Barrier Reef, Australia (M. Onishi).
Psammogobius pisinnus, n. sp.
Sandslope Goby
Diagnosis. A species of Psammogobius with the following combination of characters: dorsal-fin rays VI+I,9 (rarely I,10), third dorsal-fin spine sometimes with short filamentous extension; anal-fin rays I,9 (rarely I,8); pectoral-fin rays 16–19 (usually 17); pelvic fins reaching anal-fin origin; pelvic frenum weakly developed; longitudinal scales 25–28; predorsal scales 5–7; cheek and opercle scaled; tongue distinctly bilobed with a deep cleft between lobes; small maximum size of less than 20 mm SL. Color in life light gray to whitish with three broad brown saddles on dorsal half of body, the anteriormost darkest and positioned below first dorsal fin; operculum and cheek mottled dark brown; whitish streak on middle pectoral-fin rays. Inhabits sand slopes near coral reefs.
Etymology. The species is named pisinnus (Latin: small or little) with reference to the exceptionally small maximum size in comparison to congeners.
Gerald R. Allen. 2017. Psammogobius pisinnus, A New Species of Reef Goby (Teleostei: Gobiidae) from Papua New Guinea and Australia. Journal of the Ocean Science Foundation. 26, 80–85. DOI: 10.5281/zenodo.571211
كيف تحصل على مدونة جاهزة بآلاف المواضيع والمشاركات من هنا
شاهد قناة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على اليوتيوب لمزيد من الشرح من هنا
رابط مدونة منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات في أي وقت حــــتى لو تم حذفها من هنا شاهد صفحة منتدى مدونات بلوجر جاهزة بألاف المواضيع والمشاركات على الفيس بوك لمزيد من الشرح من هنا
تعرف على ترتيب مواضيع منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات (حتى لا تختلط عليك الامور) من هنا
ملاحظة هامة: كل عمليات تنزيل، رفع، وتعديل المواضيع الجاهزة تتم بطريقة آلية، ونعتذر عن اي موضوع مخالف او مخل بالحياء مرفوع بالمدونات الجاهزة بآلاف المواضيع والمشاركات، ولكم ان تقوموا بحذف هذه المواضيع والمشاركات والطريقة بسيطة وسهلة. ــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــــسلامـ.
