Deepest known novel species of the genus Ophiuroglypha Hertz, 1927 (Echinodermata: Ophiuroidea) from the central rift zone, Philippine Sea Author Nethupul, Hasitha 947FC889-2FAA-465B-8F4C-93E4DF21BD00 Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, CAS, 57200 Sanya, China. & University of Chinese Academy of Sciences, Beijing 100039, China. Nethupul@idsse.ac.cn Author Stöhr, Sabine 412800EB-AACE-4313-9810-61F89B740405 Swedish Museum of Natural History, Dept of Zoology, Box 50007, 10405 Stockholm, Sweden. sabine.stohr@nrm.se Author Zhang, Haibin 42C09E82-18C5-446D-B4F4-A2C8F2367AC9 Institute of Deep-sea Science and Engineering, Chinese Academy of Sciences, CAS, 57200 Sanya, China. hzhang@idsse.ac.cn text European Journal of Taxonomy 2023 2023-09-26 891 167 185 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2281/9835 journal article 269421 10.5852/ejt.2023.891.2281 32ba8e03-593e-4dbb-a965-258f61d6e665 2118-9773 8382615 A8753CAC-F181-4E6D-82F3-F4A456025447

Table 3 (continued). Tabular key to all species of the genus Ophiuroglypha Hertz, 1927, compiled from the literature. For convenience, the second oral tentacle pore is here labelled as the 1 st pore, because it is the first visible pore along the arm, the actual first pore being placed laterally in the oral plates (= jaw) and both ventral tentacle scales and adoral shield spines in second oral tentacle pore labelled as tentacle scales. Abbreviations: ASE = arm segment; DAP = dorsal arm plate; LOP = lateral oral papillae; TS = tentacle scale; VAP = ventral arm plate; VMT = ventralmost tooth.

Species	arm spines	Radial shields	Dorsal disc	Oral frame	Tentacle scales	VAP	DAP	References
Ophiuroglypha euryplax (H.L. Clark, 1939)	up to 2–3, slender, large, triangular, blunt, ½ ASE length separated by single large diamond- shaped scale		5 radial primary plates, pentagonal centrodorsal plate, each plate with single row of tubercle	5 LOP, 1 spiniform VMT	1st pore 3–4 TS at each side; 2nd pore 4 TS, 3rd pore 2 TS, 4th pore 1 TS, then absent	1st triangular, beyond pentagonal, separated	fan-shaped, separated	H.L. Clark (1939)
Ophiuroglypha fendouzhe sp. nov.	up to 3, rarely 4, small, smooth, pointed tip, similar in length, ½ ASE	broad, slightly wider than long, triangular, barely connected to each other distally, proximal half separated by 1 elongated disc scale	large irregular, and polygonal overlapping scales, centrodorsal plate rounded	4–5 LOP, 2 spiniform VMT	1st pore 4–5 TS at 1st–2nd slightly small, diamond- each side; 2nd pore wider than long, shaped, as wide as 7–8 TS, 3rd–4th pores pentagonal, and long, and widely 4–6 TS, 5th–6th contiguous, separated pores 2–4 TS, after following VAP 8th or 10th only one, wider than long, then absent pentagonal to triangular, separated			this study
Ophiuroglypha irrorata irrorata (Lyman, 1878)	up to 3, very small, upper one well separated from others	rounded to oval, separated	small, irregular disc scales, distinct radial primary plates	5–6 LOP, 1–2 spiniform VMT	1 st pore 3–4 TS at each side; 2 nd pore 7–12 TS	separated, diamond- fan-shaped, shaped contiguous		Lyman (1878, 1882), Lütken & Mortensen (1899), H.L. Clark (1911, 1915), Matsumoto (1917), Hertz (1927), Olbers et al. (2019)
Ophiuroglypha jejuna (Lyman, 1878)	up to 3, evenly spaced, 2/3 ASE long, tapering	triangular, contiguous	closed rosette of five rounded radial primary plates; smooth thin rounded scales	5 LOP, 2 spiniform VMT	1st pore 4–5 TS at separated, 1st each side; 2nd pore triangular, 2nd and 4–5 TS, 3rd pore 2–3 beyond pentagonal TS, then 2 TS and finally 1 TS		contiguous	Lyman (1878)
Ophiuroglypha kinbergi (Ljungman, 1866)	up to 3, upper one slightly longer than others, 1 ASE long	short, pear-shaped, separated by 1 large and 3–4 small scales	scales close set, rounded, different in size	4–6 LOP, 1–2 spiniform VMT	1st pore 4–5 TS at each side; 1st pore 4–5 TS, 2nd pore 3 TS, 3rd and 4th pore 2 TS, beyond 1 TS	separated, 1st triangular fan-shaped, 2nd pentagonal	contiguous	Ljungman (1866), Olbers et a l. (2019)
Ophiuroglypha lymani (Ljungman, 1871)	up to 3, evenly spaced, ½ ASE length	longer than wide, widely separated by three disc scales	separated rosette of five rounded primary plates	4–5 LOP, 2–3 spiniform VMT	1st pore 6 TS at each side; 2nd pore 4–5 TS	1st–3rd contiguous then separated, 1st triangular, 2nd pentagonal, beyond triangular	contiguous	Ljungman (1871), Hertz (1927)