[Botany • 2017] Carex socotrana • A New Endemic Species (Cyperaceae) from Socotra Island ---ScRaBBlE

 Carex socotrana  Rěpka & Maděra

in Řepka, Maděra, Čermák & Forrest, 2017.  
 @CMEPorg  ||  DOI: 10.3417/D-16-00004   

ABSTRACT

We describe Carex socotrana Rěpka & Maděra, a new endemic species found in the Hajhir Mountains on Socotra Island. It differs from the morphologically similar African continental species C. steudneri Boeckeler in having a shorter stem, smaller leaf length and width, completely smooth leaf blades and margins, and pistillate scales without a whitish membranous margin and with distinctive awns at the apex. The spike clusters are smaller and more scattered on the stem, and the perigynium and its beak are smaller than in C. steudneri. So far only one small and one large population have been found near the highest mountain peak, Mount Scand. The new taxon is 1370 km from the closest known site of C. steudneri.

Keywords: Carex, Cyperaceae, IUCN, Socotra

Radomír Řepka, Petr Maděra, Martin Čermák and Alan Forrest. 2017. Carex socotrana, A New Endemic Species from Socotra Island. Novon: A Journal for Botanical Nomenclature. 25(4); 467–472.  DOI: 10.3417/D-16-00004 

ResearchGate.net/publication/321198484_Carex_socotrana_a_New_Endemic_Species_from_Socotra_Island

 twitter.com/CMEPorg/status/934055316542640128

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

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شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

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.

[Herpetology • 2017] Ptyodactylus ruusaljibalicus • Cryptic Diversity in Ptyodactylus (Reptilia: Gekkota) from the northern Hajar Mountains of Oman and the United Arab Emirates uncovered by An Integrative Taxonomic Approach ---ScRaBBlE

Ptyodactylus ruusaljibalicus 

 Simó-Riudalbas, Metallinou, de Pous, Els, Jayasinghe, Péntek-Zakar, Wilms, Al-Saadi & Carranza, 2017

 Ruus al Jibal Fan-footed Gecko,  الأقدام مروحية الجبال رؤوس وزغة  DOI: 10.1371/journal.pone.0180397 

Abstract

The Hajar Mountains of south-eastern Arabia form an isolated massif surrounded by the sea to the east and by a large desert to the west. As a result of their old geological origin, geographical isolation, complex topography and local climate, these mountains provide an important refuge for endemic and relict species of plants and animals. With 19 species restricted to the Hajar Mountains, reptiles are the vertebrate group with the highest level of endemicity, becoming an excellent model for understanding the patterns and processes that generate and shape diversity in this arid mountain range. The geckos of the Ptyodactylus hasselquistii species complex are the largest geckos in Arabia and are found widely distributed across the Arabian Mountains, constituting a very important component of the reptile mountain fauna. Preliminary analyses suggested that their diversity in the Hajar Mountains may be higher than expected and that their systematics should be revised. In order to tackle these questions, we inferred a nearly complete calibrated phylogeny of the genus Ptyodactylus to identify the origin of the Hajar Mountains lineages using information from two mitochondrial and four nuclear genes. Genetic variability within the Hajar Mountains was further investigated using 68 specimens of Ptyodactylus from 46 localities distributed across the entire mountain range and sequenced for the same genes as above. The molecular phylogenies and morphological analyses as well as niche comparisons indicate the presence of two very old sister cryptic species living in allopatry: one restricted to the extreme northern Hajar Mountains and described as a new species herein; the other distributed across the rest of the Hajar Mountains that can be confidently assigned to the species P. orlovi. Similar to recent findings in the geckos of the genus Asaccus, the results of the present study uncover more hidden diversity in the northern Hajar Mountains and stress once again the importance of this unique mountain range as a hot spot of biodiversity and a priority focal point for reptile conservation in Arabia.

Fig 1. Geographical distribution and phylogenetic relationships of the two species from the Hajar Mountains. 

 

Fig 5. View of the common habitat in the mountainous Ruus al Jibal and general appearance in life of Ptyodactylus ruusaljibalicus sp. nov.
  (A) Rocky habitat in the type locality on the 23rd of April 2013. (B) Holotype of P. ruusaljibalicus sp. nov. (voucher code NHMUK2013.347) including a detail of the cloacal tubercles at the tail base.

 All photographs taken by Salvador Carranza. 

Taxonomy

Despite the high level of crypsis between the populations from the Ruus al Jibal and P. orlovi in the characters studied here, the results of the two mitochondrial and four nuclear gene fragments analysed (Figs 1B, 1C and 2) clearly show that these two lineages have been evolving independently for a long time. As a result of that, and based also on a few morphological traits (see diagnosis below, Tables 1 and 2 and S3 Table), we describe this unnamed population from the extreme northern part of the Hajar Mountain range as a new species.

Family Phyllodactylidae

Genus Ptyodactylus Goldfuss, 1820

Ptyodactylus ruusaljibalicus sp. nov.

Etymology. The specific name “ruusaljibalicus” is an adjective that refers to Ruus al Jibal, that means “Heads of the Mountains”, where all the specimens that belong to this species have been found to date and from where the species is probably endemic.

Diagnosis. A large size species of the genus Ptyodactylus characterized by the following combination of characters: (1) large size with a maximum recorded SVL of 90.01 mm for males and 85.94 mm for females (only one female known); (2) head narrow with elongated snout; (3) 12–13 infralabials and 12–14 supralabials; (4) dorsum with 9–11 irregular longitudinal rows of round, enlarged and slightly keeled tubercles; (5) absence of enlarged tubercles on the dorsal side of the extremities; (6) four prominent cloacal tubercles at the tail base (two on each side); (7) 9–11 subdigital scales on the 4th finger and 10–11 under the 4th toe; (8) 18–22 terminal lamellae under the 4th finger and 20–22 under the 4th toe; (9) in life, uniform light grey dorsum, some specimens with dark brown transverse bands that extended onto the tail. Underside of body and tail ivory-white.

Distribution and ecology. Despite intensive sampling across the Hajar Mountain range and other areas in Arabia carried out between 2004 and 2014, Ptyodactylus ruusaljibalicus sp. nov. has only been found in the Ruus al Jibal region, from the Musandam Peninsula to the Dibba region in the UAE. It can be therefore considered endemic to this distinctive geographical area (Fig 1A). The northernmost and southernmost localities lie approximately 26 km northwest and 58 km south-west of the type locality, respectively. The minimum distance between Ptyodactylus ruusaljibalicus sp. nov. and P. orlovi is 23 km by air. Ptyodactylus ruusaljibalicus sp. nov. inhabits cliffs and cave fissures, rocks and boulders at different heights. The species is mainly nocturnal, although some specimens were out in the shade during the day.

Proposal of common names.

English: Ruus al Jibal fan-footed gecko

Arabic: الأقدام مروحية الجبال رؤوس وزغة

Marc Simó-Riudalbas, Margarita Metallinou, Philip de Pous, Johannes Els, Sithum Jayasinghe, Erika Péntek-Zakar, Thomas Wilms, Saleh Al-Saadi, Salvador Carranza. 2017. Cryptic Diversity in Ptyodactylus (Reptilia: Gekkonidae) from the northern Hajar Mountains of Oman and the United Arab Emirates uncovered by An Integrative Taxonomic Approach.
 PLoS ONE. 12(8): e0180397. DOI: 10.1371/journal.pone.0180397

    

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

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شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

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.

[Herpetology • 2018] Asaccus arnoldi • Systematics, Biogeography and Evolution of Asaccus gallagheri (Squamata, Phyllodactylidae) with the Description of A New Endemic Species from Oman ---ScRaBBlE

Asaccus arnoldi

 Simó-Riudalbas, Tarroso, Papenfuss, Al-Sariri & Carranza, 2018

  DOI: 10.1080/14772000.2017.1403496 

Abstract

The Hajar Mountains are the highest mountain range in eastern Arabia. Despite being classified as a mountain desert, it is considered one of the top biodiversity hotspots of Arabia. As a result of its relatively old geological origin, complex topography, environmental heterogeneity and geographic isolation from other mountain ranges, its fauna and flora have diversified significantly producing high levels of endemicity, particularly amongst reptiles. Several genetic studies indicate that this diversity may still be underestimated, especially within some groups containing morphologically similar species like the nocturnal geckos of the genus Asaccus. These have radiated extensively on both sides of the Gulf of Oman, in the Hajar Mountains and the Zagros Mountains of south-west Asia, and are a good example of the faunal affinities between these two mountain ranges. In the present work, we analyse A. gallagheri, the smallest species of the Arabian radiation, using an unprecedented sampling across its entire distribution range and an integrative approach combining morphological, macroecological and multilocus molecular data with the objective of clarifying its systematics and phylogeography. The results support the presence of two allopatric species within A. gallagheri that split approximately 6 Ma. The newly discovered species is endemic to the Eastern Hajars and is described herein mainly on the basis of its smaller size and high genetic divergence from A. gallagheri. The molecular analyses also uncovered remarkable levels of genetic diversity within both species. The present study highlights the diversity of the genus Asaccus in south-east Arabia and stresses its relevance from a conservation point of view.

Key words: Arabia, biogeography, endemicity, geckos, Hajar Mountains, hypervolumes, species delimitation, taxonomy

Fig. 3. View of the type locality and general appearance in life of Asaccus arnoldi sp. nov.
1) Holotype of A. arnoldi sp. nov. (male; voucher code BMNH.2008.961);
2) Rocky sides of Wadi Bani Khalid in 2016;
3) Female (above) and male (below) A. arnoldi sp. nov. with the characteristic dimorphic tail colouration.

All photographs taken by Salvador Carranza.

Asaccus Dixon and Anderson, 1973
Asaccus arnoldi sp. nov.

Asaccus arnoldi sp. nov.

Etymology. The species epithet ‘arnoldi’ is a genitive Latin noun to honour the British herpetologist, Dr E.Nicholas Arnold, for his life-long dedication and contribution to Arabian herpetology, including the description of the little-known gecko Asaccus gallagheri 45 years ago.  

Marc Simó-Riudalbas, Pedro Tarroso, Theodore Papenfuss, Thuraya Al-Sariri and Salvador Carranza. 2018. Systematics, Biogeography and Evolution of Asaccus gallagheri (Squamata, Phyllodactylidae) with the Description of A New Endemic Species from Oman. Systematics and Biodiversity.  DOI: 10.1080/14772000.2017.1403496

 ResearchGate.net/publication/321831031_Systematics_biogeography_and_evolution_of_Asaccus_gallagheri_Squamata_Phyllodactylidae_with_the_description_of_a_new_endemic_species_from_Oman
facebook.com/MarcSimoRiudalbas/posts/10214933978605446

    

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

او

من هنا

شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

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.

[Herpetology • 2017] Diversification in Arid Mountains: Biogeography and Cryptic Diversity of Pristurus rupestris rupestris in Arabia ---ScRaBBlE

 Pristurus r. rupetris of the high altitude robust morphotype.
  Panoramic view of Wadi Sareen, a Protected Area that includes the only known locality of one of the new species discovered in this study.

ibe.upf-csic.es  DOI: 10.1111/jbi.12929  

Abstract

Aim

To understand the patterns of genetic, geographical and morphological diversification in the Arabian gecko subspecies Pristurus rupestris rupestris, and to discuss the various processes that generate and shape diversity in arid mountain ranges.

Location

Hajar Mountains, south-eastern Arabian Peninsula.

Methods

We sampled 466 individuals across the entire range of P. r. rupestris in the Hajar Mountains and sequenced one mitochondrial gene for all the samples, and one extra mitochondrial and four nuclear genes for a subset of 75 specimens. A total of 155 individuals were characterized morphologically. Multilocus coalescent-based methods were used for species delimitation, for phylogenetic inference of species trees and to investigate the diversification dynamics. Multivariate statistics were used to analyse morphological data.

Results

Our molecular methods revealed 14 candidate species hidden within the subspecies P. r. rupestris. Diversification started c. 15 Ma, but most of the lineages have evolved in the last 7 Ma of the mountains’ orogeny, producing a mosaic of allopatric taxa. Secondary interchange has occurred between high and low elevation lineages, and along the mountain chain between unrelated lineages formerly separated by mountain blocks. Morphological variation between the 14 candidate species is slight, but a high elevation robust morphotype is identified.

Main conclusions

Our results support the notion that mountain ranges constitute important centres of diversification in arid regions, and also act as ‘species pumps’ into surrounding areas. We also demonstrate that arid mountains may constitute important reservoirs of cryptic diversity, even in common and widespread species. This, and previous evidence, suggest that the Hajar Mountains are a biological hotspot and an important reservoir of diversity. We therefore suggest that these mountains should be a priority focal point for conservation in Arabia.

Keywords: allopatry; Arabia; arid mountains; biodiversity; biogeography; cryptic species; diversification; evolution; systematics

Photo 1: Pristurus r. rupetris of the high altitude robust morphotype.

photo: S. Carranza.  

Photo 2: Panoramic view of Wadi Sareen, a Protected Area that includes the only known locality of one of the new species discovered in this study.

photo: S. Carranza. 

Joan Garcia-Porta, Marc Simó-Riudalbas, Michael Robinson and Salvador Carranza. 2017. Diversification in Arid Mountains: Biogeography and Cryptic Diversity of Pristurus rupestris rupestris in Arabia.  Journal of Biogeography. DOI: 10.1111/jbi.12929 

Researchgate.net/publication/313243310_Diversification_in_arid_mountains_biogeography_and_cryptic_diversity_of_Pristurus_rupestris_rupestris_in_Arabia

The Hidden Biodiversity of Reptiles https://www.ibe.upf-csic.es/home/-/asset_publisher/T2caeLMECPvW/content/id/7612754

https://twitter.com/IBE_Barcelona/status/828557813920235521

Scientists uncover 14 new gecko species within a single subspecies - Oman
 http://www.muscatdaily.com/Archive/Oman/Scientists-uncover-14-new-gecko-species-within-a-single-subspecies-4ykk

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

او

من هنا

شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

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.

[Herpetology • 2017] A Phylogeny of Open-habitat Lizards (Squamata: Lacertidae: Ophisops) Supports the Antiquity of Indian Grassy Biomes ---ScRaBBlE

scroll.in
DOI: 10.1111/jbi.12999 

Abstract

Aim: India is dominated by tropical grassy biomes (TGBs), traditionally considered seres or degraded forest, with low diversity relative to the restricted, ancestral wet zone. It is unclear if Indian grasslands and other open habitats are anthropogenically derived or native, old-growth habitats; without a clear timescale of grassland evolution. One way to understand grassland evolution is to study the diversification in taxa restricted to open habitats. We use a dated phylogeny of Ophisops to address questions related to the origin, diversification and inter-relationships of Indian and Saharo-Arabian Ophisops, and ultimately the origin of Indian grasslands and open habitats.

Location: The Indian subcontinent; the Saharo-Arabian Realm.

Methods: We generated up to 2736 base pairs of aligned sequence data (one mitochondrial, two nuclear genes) for Indian lacertids and reconstructed phylogenetic relationships using maximum likelihood and Bayesian inference. We use a fossil-calibrated timetree, diversification analyses and ancestral area reconstructions to test the hypotheses of origin and relationships with Saharo-Arabian Ophisops.

Results: Ophisops is strongly supported as monophyletic, with a basal split into a large-bodied (LBC) and small-bodied clade (SBC). The Saharo-Arabian species are nested within the Indian species in the LBC. Species diversity in Indian Ophisops is grossly underestimated, with 26–47 candidate species. Ophisops began diversifying in the late Oligocene with significant rate shifts in the late Miocene-Pliocene and Pleistocene within the SBC.

Main conclusions: Our results are consistent with an ancient origin of grassland taxa and TGBs in India. Ophisops is a dramatic example of overlooked cryptic diversity outside forests, with ~30 species where five were known. Ophisops dispersed into India from the Saharo-Arabian Realm in the Oligocene with a back dispersal in the Middle Miocene, a novel biogeographical pattern. Diversification in the SBC of Ophisops increased 8-fold during the global C4 grassland expansion. Indian TGBs are old-growth ecosystems that need urgent conservation attention.

Habitats of Ophisops leschenaultii species complex, Tumkur District, Karnataka. 

  

Ishan Agarwal and Uma Ramakrishnan. 2017. A Phylogeny of Open-habitat Lizards (Squamata: Lacertidae: Ophisops) Supports the Antiquity of Indian Grassy Biomes.  Journal of Biogeography. DOI: 10.1111/jbi.12999

How lizards revealed the millennia-old evolution story of India’s grasslands

scroll.in/magazine/836758/how-lizards-revealed-the-ancient-evolution-story-of-indias-grasslands via @scroll_in

  

  

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روابط التحميل والمشاهدة، الروابط المباشرة للتحميل

من هنا

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من هنا

شاهد هذا الفيديو القصير لطريقة التحميل البسيطة

منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

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.

[Ichthyology • 2017] Review of Red Sea Xenisthmus Snyder (Gobioidei: Xenisthmidae), with Description of A New Species; Xenisthmus oligoporus ---ScRaBBlE

Xenisthmus oligoporus Gill, Bogorodsky & Mal, 2017
Xenisthmus balius Gill & Randall, 1994 
Xenisthmus polyzonatus (Klunzinger, 1871)

DOI:  10.11646/zootaxa.4286.2.4

Abstract

Three species of the xenisthmid genus Xenisthmus Snyder are recorded from the Red Sea. Xenisthmus polyzonatus (Klunzinger), the only described species previously known from the Red Sea, is reported on the basis of eight specimens from Egypt, Eritrea and Saudi Arabia. Xenisthmus oligoporus new species is described from four specimens, 17.7–25.0 mm SL, from Sudan and Saudi Arabia. It is distinguished from all other congeners in having a reduced number of cephalic sensory pores and 14–15 segmented rays in the second dorsal fin. Xenisthmus balius Gill & Randall is newly recorded from the Red Sea on the basis of 13 specimens from Eritrea, Egypt and Saudi Arabia. The new specimens of this species are described and compared with previously known specimens, the holotype and eight paratypes from the Arabian (= Persian) Gulf. All three species are described in detail and illustrated with colour photographs. An identification key to the species is also provided.

Keywords: Pisces, Arabian Gulf, taxonomy, key to species

Xenisthmus oligoporus new species

 Few-pored wriggler

Diagnosis. Xenisthmus oligoporus is distinguished from congeners in having a reduced number of cephalic sensory pores (lacking pores A, I, J, K, P and Q) and in having 14–15 segmented rays in the second dorsal fin.

Etymology. The specific epithet is from the Greek oligos (few) and poros (hole) and alludes to the relatively low number of sensory pores on the head. To be treated as a noun in apposition.

Habitat and distribution. Known from sandy areas adjacent to reefs in 6–13 m. The species is currently known from Duba, Saudi Arabia, south to the Farasan Archipelago (Figure 3).

Xenisthmus balius Gill & Randall, 1994 

Freckled wriggler

Diagnosis. A species of Xenisthmus with the following combination of characters: dorsal-fin rays VI + I,13 (rarely I,14); anterior rim of posterior nostril raised, without well-developed flap; scales of body mainly cycloid; head and body pale, with reticulate mottling dorsally.

Habitat and distribution. Xenisthmus balius was previously known only from Jana Island, Saudi Arabia, in the Arabian Gulf. We newly record this species from the Red Sea on the basis of 13 specimens collected in Eritrea, Egypt and Saudi Arabia (Figure 3). It has been collected from sandy areas adjacent to coral rubble and reefs in 1.5– 17 m.

Xenisthmus polyzonatus (Klunzinger, 1871) 

Bullseye wriggler

Diagnosis. A species of Xenisthmus with the following combination of characters: second dorsal-fin rays usually I,11 (rarely I,12); anal-fin rays I,10–11; tongue rounded to truncate; and posterior nostril with well-developed anterior flap.

Anthony C. Gill, Sergey V. Bogorodsky and Ahmad O. Mal. 2017. Review of Red Sea Xenisthmus Snyder (Teleostei: Gobioidei: Xenisthmidae), with Description of A New Species. Zootaxa. 4286(2);  DOI:  10.11646/zootaxa.4286.2.4

  

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منتدى مدونات بلوجر جاهزة بآلاف المواضيع والمشاركات

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.