Diotascalpellum rubrum (Hoek, 1883)

Pitriana, Pipit, Jones, Diana S., Corbari, Laure & Rintelen, Kristina von, 2020, New insights gained from museum collections: Deep-sea barnacles (Crustacea, Cirripedia, Thoracica) in the Museum National d'Histoire Naturelle, Paris, collected during the Karubar expedition in 1991, Zoosystematics and Evolution 96 (2), pp. 649-698 : 649

Diotascalpellum rubrum (Hoek, 1883) Figure 9

Scalpellum rubrum Hoek, 1883: 91, pl. IV fig. 18. - Pilsbry 1911: 62, text-fig. 1, pl. VIII, figs 1-4. - Calman 1918b: 122-123. - Broch 1922: 237. - Nilsson-Cantell 1927: 745-747, text-fig. 2. - 1931: 2.

Trianguloscalpellum rubrum . - Zevina 1981: 316-317, fig. 240. - Rosell 1986: 89, text-fig. 1a. - 1991: 22, fig. 1f, g. - Huang 1994: 517. - 2001: 318. - Jones et al. 2001: 254. - Young 2001: 464, fig. 7. - Jones 2007: 292. - Shalaeva and Boxshall 2014: 49, fig. 34.

Diotascalpellum rubrum . - Gale 2016: 297, figs 2A, 6U-Y, 11Q-T, 13K-M, 18A-G.

Material examined.

- Kei Islands: 2 specimens, MNHN-IU-2019-4925, Stn. CP 09, 05°23'S, 132°29'E, 368-389 m depth, 23 October 1991; 1 specimen, MNHN-IU-2019-4926, Stn. CP 16, 05°17'S, 132°50'E, 330-350 m depth, 24 October 1991, attached to gorgonian.

Diagnosis.

Capitulum with 14 plates, smooth, white and reddish coloured; carina simply, strongly bowed, roof slightly convex with umbo at apex; rostrum triangular, distinct; upper latus quadrangular, large; infra-median latus triangular.

Description.

Capitulum flat, rather broad, not covered by distinct membrane. Scutum with occludent margin arched, forming with tergal margin a triangular portion projecting over tergum. Tergum surpassing scutal area with occludent margin almost straight. Upper latus quadrangular, angle at apex between scutal and tergal margins distinctly projecting over scutum. Rostrum small, triangular; rostrolatus very low, quadrangular; infra-median latus small, triangular, umbo at apex; carinal latus larger than other latera with carinal margin arched. Cirrus I with anterior and posterior rami almost same length; cirrus VI with long caudal appendages. Maxillule not notched, with large spine on upper side, cutting edge almost straight; mandible with three large teeth excluding inferior angle. Measurements of two specimens: height of capitulum 12.51-20.57 mm, width 7.39-10.55 mm, thickness 4.09-6.51 mm; length of peduncle 5.10-7.76 mm, width 4.36-6.62 mm.

Distribution.

Java Sea, Indonesia. Pacific: western central and northwest; Philippines; Kagoshima Sea and Sagami Bay, Japan; 133-551 m depth ( Shalaeva and Boxshall 2014). In this study, Diotascalpellum rubrum was found at Kei Islands, Indonesia.

Type locality.

Philippines, 12°43'N, 122°10'E; depth, 180 m and 207 m; bottom, mud (near Luzon) ( Hoek 1883).

Figures

Figure 9. Diotascalpellum rubrum (Hoek, 1883) (MNHN-IU- 2019 - 4925). a. left lateral view showing the capitulum and peduncle; b. right lateral view showing the capitulum and peduncle; c. rostral view showing the capitulum and peduncle; d. carinal view. Scale bar: 5 mm (a-d).