Table 3 in Deepest known novel species of the genus Ophiuroglypha Hertz, 1927 (Echinodermata: Ophiuroidea) from the central rift zone, Philippine Sea

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.
Speciesarm spinesRadial shieldsDorsal discOral frameTentacle scalesVAPDAPReferencesOphiuroglypha euryplax (H.L. Clark, 1939)up to 2–3, slender, large, triangular, blunt, ½ ASE length separated by single large diamond- shaped scale5 radial primary plates, pentagonal centrodorsal plate, each plate with single row of tubercle5 LOP, 1 spiniform VMT1st pore 3–4 TS at each side; 2nd pore 4 TS, 3rd pore 2 TS, 4th pore 1 TS, then absent1st triangular, beyond pentagonal, separatedfan-shaped, separatedH.L. Clark (1939)Ophiuroglypha fendouzhe sp. nov.up to 3, rarely 4, small, smooth, pointed tip, similar in length, ½ ASEbroad, slightly wider than long, triangular, barely connected to each other distally, proximal half separated by 1 elongated disc scalelarge irregular, and polygonal overlapping scales, centrodorsal plate rounded4–5 LOP, 2 spiniform VMT1st 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, separatedthis studyOphiuroglypha irrorata irrorata (Lyman, 1878)up to 3, very small, upper one well separated from othersrounded to oval, separatedsmall, irregular disc scales, distinct radial primary plates5–6 LOP, 1–2 spiniform VMT1 st pore 3–4 TS at each side; 2 nd pore 7–12 TSseparated, diamond- fan-shaped, shaped contiguousLyman (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, taperingtriangular, contiguousclosed rosette of five rounded radial primary plates; smooth thin rounded scales5 LOP, 2 spiniform VMT1st 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 TScontiguousLyman (1878)Ophiuroglypha kinbergi (Ljungman, 1866)up to 3, upper one slightly longer than others, 1 ASE longshort, pear-shaped, separated by 1 large and 3–4 small scalesscales close set, rounded, different in size4–6 LOP, 1–2 spiniform VMT1st pore 4–5 TS at each side; 1st pore 4–5 TS, 2nd pore 3 TS, 3rd and 4th pore 2 TS, beyond 1 TSseparated, 1st triangular fan-shaped, 2nd pentagonalcontiguousLjungman (1866), Olbers et a l. (2019)Ophiuroglypha lymani (Ljungman, 1871)up to 3, evenly spaced, ½ ASE lengthlonger than wide, widely separated by three disc scalesseparated rosette of five rounded primary plates4–5 LOP, 2–3 spiniform VMT1st pore 6 TS at each side; 2nd pore 4–5 TS1st–3rd contiguous then separated, 1st triangular, 2nd pentagonal, beyond triangularcontiguousLjungman (1871), Hertz (1927)