Pascahinnites pasca ( Dall, 1908 )

Raines, Bret & Huber, Markus, 2012, 3217, Zootaxa 3217, pp. 1-106 : 36-37

publication ID

1175­5334

DOI

https://doi.org/10.5281/zenodo.5250653

persistent identifier

https://treatment.plazi.org/id/03F187DA-6F74-FFA8-A394-8C68FBB7FE9E

treatment provided by

Felipe

scientific name

Pascahinnites pasca ( Dall, 1908 )
status

 

Pascahinnites pasca ( Dall, 1908) View in CoL

Figures 17 A–H

Pecten (Chalmys) [sic] pasca Dall, 1908: p. 401 View in CoL .

Chlamys pasca ( Dall, 1908) View in CoL — Rehder, 1980: p. 109, pl. 13, figs. 3–6.

Pascahinnites pasca ( Dall, 1908) View in CoL — Dijkstra & Raines, 1999: p. 200, figs. 1–2; Raines & Poppe, 2006: p. 222, pl. 170, figs 1–4; Tröndlé & Boutet, 2009: p. 6; Dijkstra & Maestrati, 2010: p. 339 View Cited Treatment , figs. 3 L–M.

Material examined. Over one hundred articulated specimens and single valves (3.2 to 19.6 mm) (BK).

Diagnosis. Chlamydoid shell, small (up to 20 mm in height), slightly equivalve and equilateral; umbonal angle ca. 90–95 o. Left valve with 12–14 prominent primary radial ribs, and numerous intercalated secondary ribs toward the ventral margin. Shagreen microsculpture throughout except on crest of ribs, where fine spines may be present. Radial ribs of RV bi- or tripartite, and weaker and less angulated than those of the LV. Auricles unequal in size (anterior larger than posterior), with small prickly radial riblets, more prominent on anterior auricle. In juveniles and subadults, byssal notch moderately deep, with active well developed ctenolium consisting of 4–6 teeth. Valves of mature specimens distort after 9–11 mm, due to changes in preferred habitat. Color variable, whitish, creamy, yellowish or rose-pink with spots and/or streaks; RV paler than LV.

Remarks. Adults up to about 10 mm are either free swimming or byssally attached. Once mature they appear to prefer colder water and live cemented to hard substratum. This change in habitat tends to strongly distort the valves in order to accommodate the surface of the selected substrate.

Habitat. Commonly found at many locations around EI and SyG, from 10–150 m. Free swimming or byssally attached as juveniles in shallow water (10–30 m), while adults are cemented to substratum below 50 m.

Distribution. Pascahinnites pasca was previously thought to be endemic to EI and SyG, but it has been recently recorded from the Austral Islands as well, Dijkstra and Maestrati (2010) — E4.

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Pectinida

Family

Pectinidae

Genus

Pascahinnites

Loc

Pascahinnites pasca ( Dall, 1908 )

Raines, Bret & Huber, Markus 2012
2012
Loc

Pascahinnites pasca ( Dall, 1908 )

Dijkstra, H. H. & Maestrati, P. 2010: 339
Trondle, J. & Boutet, M. 2009: 6
Raines, B. K. & Poppe, G. T. 2006: 222
Dijkstra, H. H. & Raines, B. K. 1999: 200
1999
Loc

Chlamys pasca ( Dall, 1908 )

Rehder, H. A. 1980: 109
1980
Loc

Pecten (Chalmys) [sic] pasca

Dall, W. H. 1908: 401
1908
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