Trianguloscalpellum hirsutum (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

Trianguloscalpellum hirsutum (Hoek, 1883) Figure 26

Scalpellum hirsutum Hoek, 1883: 88, pl. IV, fig. 19. - Gruvel 1905: 66, fig. 74. - Pilsbry 1907a: 25.

Arcoscalpellum hirsutum . - Newman & Ross, 1971: 62-64, fig. 28.

Trianguloscalpellum hirsutum . - Zevina, 1981: 309, fig. 233. - Chan et al. 2009b: 119-121, figs 100-102. - Chan et al. 2010: 13, figs 1F, 9A-H. - Jones 2012: 371, 376. - Shalaeva and Boxshall 2014: 44, fig. 29.

Material examined.

- Tanimbar Island: 1 specimen, MNHN-IU-2019-4908, Stn. CP 91, 08°44'S, 131°05'E, 884-891 m depth, 5 November 1991.

Diagnosis.

Capitulum with 14 plates covered by membrane, covered by very long hairs; carina simply bowed, umbo at apex, roof flat; upper latus triangular; rostrum very narrow stripe distinctly visible at surface.

Description.

Capitulum small, long hairs covering plates. Scutum elongate, convex, more than twice as long as broad. Tergum large, elongate rhomboid, umbo at apex. Carina simply bowed, roof flat. Upper latus almost triangular, carinal-basal margin arched. Rostrum small, linear-shaped. Rostral latus quadrangular, basal and scutal margins parallel. Infra-median latus triangular, umbo apical. Carinal latus with irregular shape, umbo near apex. Peduncle short. Cirrus I with rami unequal, anterior ramus oval, posterior ramus more slender; cirrus VI with caudal appendages. Maxillule not notched, two stout spines on upper side; mandible with three teeth excluding inferior angle. Measurements of the specimen: height of capitulum 12.18 mm, width 6.50 mm, thickness 3.74 mm; length of peduncle 4.10 mm, width 3.43 mm.

Distribution.

Borneo, Indonesia; Pacific, Western Central and Southeast; Australia; Taiwan; Antarctica; attached to gastropod shells, rocks; 1,502-1,965 m depth ( Chan et al. 2010; Jones 2012; Shalaeva and Boxshall 2014). In this study, Trianguloscalpellum hirsutum was found at Tanimbar Island, Indonesia.

Type locality.

Pacific, Western Central (Moluccas Sea); 0°48'S, 120°58'E; depth: 252 m; bottom temperature: 2.4 °C; bottom: rock ( Hoek 1883).

Figures

Figure 26. Trianguloscalpellum hirsutum (Hoek, 1883) (MNHN-IU- 2019 - 4908). a. left lateral view showing the capitulum and peduncle; b. right lateral view showing the capitulum and peduncle; c. carinal view; d. rostral view showing the capitulum and peduncle. Scale bar: 5 mm (a-d).