Cavolinia inflexa

Abstract

Cavolinia inflexa (Lesueur, 1813) (Figs 4 M-Q) Description. – Shell (L to 4.5 mm) elongate, with flat side, two broad and short, slightly abapically pointed lateral spines located above the middle, and a broad, markedly dorsally curved central spine formed by the larval shell hat is typically retained on the adult shell. The aperture is rather narrow, but the dorsal (upper) lip is markedly broad extending well beyond the ventral (lower) lip. The shell is translucent to white in colour with some elongate brown median line or spot on the dorsal side. Remarks. – This species is poorly represented in the area, but various broken adults and larval shells / caudal spines were found. The adults have a very characteristic outline. The larval shells / caudal spines (Pl. 3 Fig. 2) are slender and have a marked carina on both sides. In those samples where only the larval shells / caudal spines are found it is not always possible to determine whether those are of C. inflexa or C. uncinata. See also under C. uncinata. Distribution. – Found in continental slope sediments off Sarawak (DD15, DD53, DD54) and Brunei (MES25) and middle (DD95) to outer shelf of Sabah (DD92).

Authors 4

1. Han
2. J. G. M.
3. Raven Aachen

   Naturalis Biodiversity Center

   Affiliation as printed

   Research Associate, Naturalis Biodiversity Center, Leiden, The Netherlands. E-mail: han. raven @ naturalis. nl; https: // orcid. org / 0000 - 0002 - 5305 - 0795

4. David J. Marshall

   Universiti Brunei Darussalam

   Affiliation as printed

   Environmental and Life Sciences, Faculty of Science, Universiti Brunei Darussalam, Brunei Darussalam. https: // orcid. org / 0000 - 0003 - 3771 - 5950 * Corresponding author. E-mail: david. marshall @ ubd. edu. bn