Notes on batoid fishes of the Socotra Archipelago (north-western Indian Ocean) with four new records Author Bogorodsky, Sergey V. Senckenberg oesearch fns ṫẚṫuṫe and Museum of ka ṫure (SMc) I Sec ṫẚon fch ṫhyology & Senckenberg B ẚodẚversẚṫy and Cl ẚmaṫe oesearch Cen ṫre (SB ẚh-c) I B ẚogeography-Senckenberganlage 2 RI SMP 2 R crankfur ṫ am Ma ẚnI GermanyK & S ṫaṫẚon of ka ṫuralẚsṫsI OmskI ouss ẚaK ẚc 18 T 19 S @ yandexKru; h ṫṫps: LLorc ẚdKorgL 0000 - 0002 - 8679 - 9735 Author Zajonz, Uwe Senckenberg oesearch fns ṫẚṫuṫe and Museum of ka ṫure (SMc) I Sec ṫẚon fch ṫhyology & Senckenberg B ẚodẚversẚṫy and Cl ẚmaṫe oesearch Cen ṫre (SB ẚh-c) I B ẚogeography-Senckenberganlage 2 RI SMP 2 R crankfur ṫ am Ma ẚnI GermanyK Author Saeed, Fouad N. Senckenberg oesearch fns ṫẚṫuṫe and Museum of ka ṫure (SMc) I Sec ṫẚon fch ṫhyology & Senckenberg B ẚodẚversẚṫy and Cl ẚmaṫe oesearch Cen ṫre (SB ẚh-c) I B ẚogeography-Senckenberganlage 2 RI SMP 2 R crankfur ṫ am Ma ẚnI GermanyK Author Weigmann, Simon blasmo-iabI blasmobranch oesearch iabora ṫoryI eamburgI GermanyK s ẚmonKweẚgmann @ elasmo-labKde; text Zootaxa 2021 4951 3 511 528 journal article 7385 10.11646/zootaxa.4951.3.5 caee27e5-0786-4e95-84fb-ee5394fa79e3 1175-5326 4668365 9BEB98F0-DEA7-4131-8E37-DFC4D5DFCB7B Rhina ancylostoma Bloch & Schneider, 1801 Shark ray, Bowmouth guitarfish Fig. 4 ohẚna ancylosṫomus Bloch & Schneider, 1801: 352 ; lectotype : ZMB 4621 , specimen lost; type locality: Coromandel Coast , south-eastern India . Material examined: 1 specimen , not preserved, female, 225 cm TL, Socotra Archipelago , Abd al-Kuri Island, 27 March 2019 . Distinctive characters: ohẚna ancylosṫoma is an unmistakable guitarfish, characterised by having a short and broadly rounded snout; upper jaw with three deep concavities; mid-line of disc with a ridge of large thorns, interorbital area with two ridges; posterior tip of pectoral fins ending before pelvic fins; spiracles without folds; upper and lower caudal-fin lobes subequal in size. Colouraṫẚon : Greyish brown, head with transverse black bands, body and fins with many small white spots. Pattern strongly pronounced in juveniles, usually less distinct in large specimens. Ventral surface pale. Distribution: Known from the Red Sea to the Gulf, south to Mauritius and South Africa ( KwaZulu-Natal ), east to eastern Australia ( New South Wales ), the Philippines and southern Japan (Last eṫ al . 2016b). In the Arabian region, the species was recorded from the Red Sea ( Debelius 1998 ), Gulf of Tadjoura (Lips eṫ al . 2016; Froese & Pauly 2020 ), and the Gulf (Randall 1995; Almojil eṫ al . 2015); records from off Oman (Muttrah), Iran and Pakistan are based on photographs of fresh specimens ( Froese & Pauly 2020 ). Remarks: The collected specimen was a mature female of 225 cm TL taken by fishermen at Abd al-Kuri Island and matches well all characters of ohẚna ancylosṫoma given by Last eṫ al . (2016b). No precise collection data on locality and habitat were recorded. The specimen was examined on board a fishing boat from the United Arab Emirates . The species occurs from close inshore to depths of at least 75 m ( Weigmann 2016 ) on the continental shelf, usually swimming close to substrata or resting on bottom in open sand areas but occasionally also seen in pelagic waters; it might be found in similar habitats in waters of the Socotra Archipelago. With 225 cm TL, the specimen is half a meter shorter than the maximum size reported for the species, 275 cm TL ( Weigmann 2016 ). The species is included as critically endangered in IUCN Red List Assessments and urgently requires conservation management (Kyne eṫ al . 2019a).