Pterygotrigla (Parapterygotrigla) jacad, Richards, William J. & Yato, Takuji, 2014

Richards, William J. & Yato, Takuji, 2014, Revision of the subgenus Parapterygotrigla (Pisces: Triglidae: Pterygotrigla), Zootaxa 3768 (1), pp. 23-42 : 27-29

Pterygotrigla (Parapterygotrigla) jacad sp. nov.

Bigeye Gurnard

( Figures 2 A –C, Table 1, 2 & 3 )

Holotype. USNM 393315, 129 mm SL, Indian Ocean, Saya de Malha Bank, 11o43’S, 0 61o 18’E l, RV Professor Mesiatzev, Sta. 241, 6 Oct. 1977, 240– 241 m.

Paratypes. SAIAB 82786, 1 (127 mm SL), Indian Ocean, Nazareth Bank, 15o58’S, 0 60o 57’E, RV Professor Mesiatzev, Sta. 400/401, 19 Sep. 1977, 300– 311 m. CSIRO H 6664-01, 1 (118.0 m SL), collected with the other paratype.

Diagnosis. Buckler in advance of D1 fin present, antrorse infraorbital spine absent, anterior infraorbital spines short (7–10% SL), P1 fin length moderate (28–31% SL), P1 1st fin free ray length moderate (26% SL), eye large (34–36%HL), snout length moderate (13–14% SL), nape and breast lack scales, belly with scales, 12–14 gill rakers length moderate, body lacks dark pigmentation except for inner surface of P1 fin black with clear edges and black spot on D1 (not visible on holotype).

Description. Counts and measurements for the type material are given in Tables 1–3. D 1 VIII–IX, D 2 12–13, A 12–13, P1 11 + 3, length moderate (28–31% SL), C 8 + 7, vertebrae 11 + 16–17, 10 bucklers along base of D1, GR moderate length (1.1–2.2 mm) with 1–2 + 11–12 + rudiments, llsc 60, nape and breast lack scales, belly 75–100% scaled, nuchal spine long extending to 3rd dorsal fin buckler, no ocular spines, opercular spine short extending to gill opening, preopercular spine short extending to gill opening, preopercular ridge present, cleithral spine long extending to below nuchal spine tip, eye large 34–36% HL, P1 fin 1st free ray length moderate (26% SL). Pterygiophore interdigitation pattern: //1/2/1/1/1/1/1/1/1/1/2/1/1/1/1/1/1/1/1/

Coloration. The three preserved specimens are uniformly brown with dark blotches on the head. The D1 fin in the paratypes has remnants of a black area in the anterior three membranes while the holotype D1 membrane is faintly gray. The inner surface of the P1 fin is black with a clear edge.

Distribution. Known only from type material collected at Nazareth and Saya de Malha Banks, western Indian Ocean.

Etymology. Noun in apposition formed arbitrarily from the senior author’s grandsons Jacob and Cade.

USNM 393315 SAIAB 82786 CSIRO H6664-01 Holotype Paratype Paratype

Figures

FIGURE 2 A. Holotype of Pterygotrigla jacad sp. nov. depicting lateral view and dorsal view of head, USNM 393315, 129.7 mm SL, Indian Ocean, Saya de Malha Bank. B. Lateral photo of the holotype of Pterygotrigla jacad sp. nov. USNM 393315, 129.7 mm SL, Indian Ocean, Saya de Malha Bank. C. Dorsal photo of the head of the holotype of Pterygotrigla jacad sp. nov. USNM 393315, 129.7 mm SL, Indian Ocean, Saya de Malha Bank.