Amigdoscalpellum tenue (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

Amigdoscalpellum tenue (Hoek, 1883) Figure 21

Scalpellum tenue Hoek, 1883: 119, pl. IV, figs 20, 21, pl. X, fig. 6. - Gruvel 1912: 345. - Nilsson-Cantell 1938: 8.

non Scalpellum tenue Annandale, 1906a: 142.

Amigdoscalpellum tenue . - Zevina 1981: 292-293, fig. 220 (2). - Shalaeva and Boxshall 2014: 17, fig. 10.

Material examined.

- Kei Islands: 1 specimen, MNHN-IU-2019-4921, Stn. CP 20, 05°15'S, 132°59'E, 769-809 m depth, 25 October 1991.

Diagnosis.

Capitulum with 13 fully calcified plates; carina slightly bowed, umbo at apex; upper latus trapeziform; inframedian latus small, narrow; carinal latus not projecting beyond carina; peduncle short, cylindrical.

Description.

Capitulum yellowish, elongate-oval shape; surface with distinct lines of growth. Carina large, simply bowed. Scutum with umbo at apex, slightly recurved, projecting slightly over tergum; tergum triangular, stout, broad, apex recurved, scutal margin almost straight. Upper latus quadrangular, apex slightly projecting over scutum. Rostral latus quadrangular, scutal and basal margins parallel. Carinal latus quadrangular, carinal margin almost straight. Cirrus I unequal, anterior ramus oval, posterior ramus more slender. Maxillule with notch between two or three stout setae at upper angle, a group of more slender setae on cutting edge; mandible with three teeth excluding inferior angle; labrum with numerous blunt teeth on straight, cutting edge. Measurements of specimen: height of capitulum 7.26 mm, width 3.74 mm, thickness 1.40 mm; length of peduncle 3.00 mm, width 1.99 mm.

Distribution.

Indian Ocean, Antarctic and Southern (North East of Prince Edward Island); known depth 2,516 m ( Shalaeva and Boxshall 2014). In this study, Amigdoscalpellum tenue was found at Kei Islands, Indonesia.

Type locality.

46°46'S, 45°31'E; depth: 2,475 m; bottom temperature: 1.5 °C; bottom: globigerina ooze ( Hoek 1883).

Figures

Figure 21. Amigdoscalpellum tenue (Hoek, 1883) (MNHN-IU- 2019 - 4921). a. left lateral view showing the capitulum and peduncle; b. right lateral view showing the capitulum and peduncle; c. carinal view showing the capitulum and peduncle; d. rostral view showing the capitulum and peduncle. Scale bar: 2 mm (a-d).