Litoscalpellum recurvirostrum (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

Litoscalpellum recurvirostrum (Hoek, 1883) Figure 18

Scalpellum recurvirostrum Hoek, 1883: 77-79, pl. III, figs 11, 12, pl. VIII, figs 9, 10.

Arcoscalpellum recurvirostrum . - Newman & Ross, 1971: 79-80, fig. 39.

Litoscalpellum recurvirostrum . - Zevina, 1974: 214. - 1981: 127, 128, fig. 88. - Shalaeva and Boxshall 2014: 13, fig. 6.

Material examined.

- Kei Islands: 1 specimen, MNHN-IU-2019-4934, Stn. CP 05, 05°49'S, 132°18'E, 296-299 m depth, 22 October 1991; 1 specimen, MNHN-IU-2019-4936, Stn. CP 09, 05°23'S, 132°29'E, 368-389 m depth, 23 October 1991.

- Tanimbar Island: 4 specimens, MNHN-IU-2019-4935, Stn. CP 83, 09°23'S, 131°00'E, 285-297 m depth, 4 November 1991; 16 specimens, MNHN-IU-2019-4937, Stn. CP 69, 08°42'S, 131°53'E, 356-368 m depth, 2 November 1991.

Diagnosis.

Capitulum plates separated, covered by fine membrane; carina slightly angularly bent; upper latus trapeziform; inframedian latus triangular; peduncle with scattered, calcareous scales.

Description.

Capitulum with 14 plates, lines of growth not distinct, plates separated by broad, membranous interspaces. Scutum elongate quadrangular, broader at base than in upper half; umbo apical, slightly projecting outwards. Tergum triangular; carina bowed; upper latus trapeziform; inframedian latus very small, triangular. Peduncle cylindrical with numerous calcareous scales scattered over surface. Cirrus I with rami unequal, anterior ramus oval, posterior ramus slender, long, segments very hairy. Maxilla bilobed; maxillule notched, two large setae above notch; mandible with three teeth, inferior angle pectinated. Measurements of five specimens: height of capitulum 16.15-26.05 mm, width 9.24-16.59 mm, thickness 4.45-8.18 mm; length of peduncle 7.25-20.90 mm, width 4.13-8.95 mm.

Distribution.

Indian Ocean, Antarctic and Southern (South of the Kerguelen Islands); known depth range 195 to 274 m ( Shalaeva and Boxshall 2014). In this study, Litoscalpellum recurvirostrum was found at Kei Islands and Tanimbar Island, Indonesia.

Type locality.

Between Kerguelen and Heard Islands; 52°4'S, 71°22'E; depth: 270 m; bottom temperature: 1.8 °C; bottom: rocks ( Hoek 1883).

Figures

Figure 18. Litoscalpellum recurvirostrum (Hoek, 1883) (MNHN-UI- 2019 - 4934). 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: 6 mm (a-d).