Dianajonesia amygdalum (Aurivillius, 1894) Figure 4

Poecilasma amygdalum Aurivillius, 1894: 10, pl. 1, figs 4-6, pl. 8, fig. 4. - Nilsson-Cantell 1921: 262, fig. 46d-g, pl. 3, fig. 6.

Poecilasma fissum (non Darwin). - Hoek, 1907: 8 (part.).

Trilasmis fissum hawaiense . - Pilsbry, 1928: 306, pl. 24, figs 1-8.

Trilasmis (Temnaspis) amygdalum . - Hiro, 1937a: 85, fig. 69.

Temnaspis amygdalum amygdalum . - Zevina, 1982: 70, fig. 62.

Temnaspis amygdalum . - Utinomi, 1966: 5. - Dong et al. 1982: 77.

Dianajonesia amygdalum . - Koçak & Kemal, 2008: 2.

Material examined.

- Tanimbar Island: 2 specimens, MNHN-IU-2019-4861, Stn. CP 79, 09°16'S, 131°22'E, 239-250 m depth, 3 November 1991, attached to crab leg.

Diagnosis.

Capitulum broadly oval, with five smooth plates; carina not extending to area between terga; peduncle with circles of small protuberances; cirri short.

Description.

Capitulum yellowish, with five tranparent, smooth plates. Scutum bilobed, occludent segment narrow, bow-shaped; tergum sub-triangular, nearly half as broad as long. Carina very narrow, slightly curved downwards, end blunt. Peduncle yellow, plainly ringed, spines absent. Cirrus I with anterior ramus wider than posterior ramus. Maxillule notched, with two strong teeth in upper part; mandible with four teeth, fourth pectinated, placed very close to inferior angle; labrum with row of minute teeth. Measurements of specimen: basal diameter of capitulum 0.94 mm; capitular height 7.03 mm; total height 10.40 mm; scutal width 4.11 mm; scutal length 5.85 mm; tergal width 1.00 mm; tergal length 3.13 mm.

Distribution.

Indo-west Pacific: Indian Ocean; Madagascar through Malaysia, Hong Kong, South China Sea; Taiwan; Philippines; South Japan; tropical West and central Pacific Ocean to Fiji and Hawaii; attached to decapod crustaceans; shallow water (Jones and Hosie 2016). In this study, Dianajonesia amygdalum was found at Tanimbar Island, Indonesia.

Type locality.

Nordwachter Island, Thousand Islands, Java Sea (Aurivillius 1894).