Planoscalpellum distinctum (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

Planoscalpellum distinctum (Hoek, 1883) Figure 23

Scalpellum distinctum Hoek, 1883: 111-112, pl. VI, figs 10, 11. - 1907: 83, pl. VII, fig. 12 - Nilsson-Cantell 1927: 750, text-fig. 4.

Planoscalpellum distinctum . - Zevina, 1981: 186-187. - Foster and Buckeridge 1995 a: 360-361, fig. 7(A-C) - Shalaeva and Boxshall 2014: 36, fig. 22.

Material examined.

- Tanimbar Island: 2 specimens, MNHN-IU-2019-4928, Stn. DW 49, 08°00'S, 132°59'E, 206-210 m depth, 29 October 1991.

Diagnosis.

Capitulum with 13 plates separated from each other by distinct chitinous interspaces; scutum almost triangular; upper latus hexagonal, large.

Description.

Capitulum flattened, elongate-oval shape; plates with distinct growth lines, separated from each other by rather broad chitinous interspaces. Scutum triangular, occludent margin arched, umbo of scutum apical, apex slightly turned upwards. Tergum triangular, occludent margin not very long. Carina simply bowed. Upper latus irregularly hexagonal, rostral latus irregularly quadrangular, infra-median latus in the form of wine-glass, carinal latus irregularly quadrangular. Peduncle short, with very small, numerous, calcareous scales. Cirrus I unequal, anterior ramus oval, posterior ramus more slender; cirrus VI with short caudal appendages. Maxillule notched, three stout spines on the upper side; mandible with three teeth, excluding inferior angle. Measurements of two specimens: height of capitulum 6.80-7.90 mm, width 3.68-4.36 mm, thickness 1.24-1.26 mm; length of peduncle 1.39-2.49 mm, width 1.80-2.04 mm.

Distribution.

Pacific, Western Central; known depth range 1,302 to 2,745 m ( Shalaeva and Boxshall 2014). In this study, Planoscalpellum distinctum was found at Tanimbar Island, Indonesia.

Type locality.

2°33'S, 144°4'E; depth: 1,926 m; bottom temperature: 2.1 °C; bottom: Globigerina ooze ( Hoek 1883).

Figures

Figure 23. Planoscalpellum distinctum (Hoek, 1883) (MNHN-IU- 2019 - 4928). 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: 2 mm (a-d).