Barbierella louisensis ( Viader, 1951 )

Taylor, John D. & Glover, Emily A., 2018, Hanging on - lucinid bivalve survivors from the Paleocene and Eocene in the western Indian Ocean (Bivalvia: Lucinidae), Zoosystema 40 (7), pp. 123-142: 130

publication ID

http://doi.org/ 10.5252/zoosystema2018v40a7

publication LSID

lsid:zoobank.org:pub:urn:lsid:zoobank.org:pub:7652DEC7-3C6C-414F-AF2C-7C396D78F6F6

DOI

http://doi.org/10.5281/zenodo.3811359

persistent identifier

http://treatment.plazi.org/id/03858788-FFCC-F175-FE94-FD3D4D45FCA2

treatment provided by

Felipe

scientific name

Barbierella louisensis ( Viader, 1951 )
status

 

Barbierella louisensis ( Viader, 1951)  

( Fig. 4A-W View FIG )

Lucina (Bellucina) louisensis Viader, 1951: 133   , pl. 3, fig. 6.

Barbierella scitula Oliver & Abou-Zeid, 1986: 222   , pl. 23, figs 1-4.

Barbierella louisensis   – Huber 2015: 430.

TYPE MATERIAL. — Lucina (Bellucina) louisensis   : 3 syntypes (Via- der mentioned 5 valves), single left valves, L 6.2 mm, H 5.2 mm; L 5.5 mm, H 4.7 mm (Viader figured shell); broken valve H 5.4 mm ( AMS C 305545)   . Barbierella scitula   : holotype, off Ras Budran, Gulf of Suez, Red Sea, 30 m, L 8.2 mm, H 7.4 mm ( NMW Z 1982.68.1)   . Paratypes: ( NMW.Z. 1986.11.1), L 9.4 mm, H 8.7 mm; ( NHMUK 1986030), L 8.7 mm, H 7.7 mm   .

TYPE LOCALITY. — Off Port Louis, Mauritius.

OTHER MATERIAL EXAMINED. — Northern Mozambique Channel: Banc de la Zélée, Expédition BENTHEDI, stn R110, lagoon with sandy bottom and dense seagrass Thalassodendron ciliatum   . 12°25’6S, 46°16’2 E, 24 m, 10.IV.1977, 1 pv, co-occurs with Gibbolucina zelee   n. sp. ( MNHN). Mozambique: Inhaca Island, “Nord de la Passe”, Expédition INHACA stn MD13, 26°03.1’S, 33°01.0’E, 50-53 m, 30.XI.2011, 9 v ( MNHN).

DISTRIBUTION. — Northern Red Sea, Mozambique Channel, Mozambique, Mauritius, Réunion.

DESCRIPTION

Small, L to 9.4 mm, H to 8.7 mm, longer than high. Anteriorly extended, anteriorly rounded but posteriorly truncate, anterior dorsal margin long. Umbones prominent. Sculpture of prominent, dorsally recurved, nodulose, commarginal lamellae with narrow, deep interspaces. Lobate nodules on lamellae aligned to give appearance of radial ribbing. Posterior sulcus with lower, sharper lamellae and forming a curved marginal sinus. Shallow anterior sulci present. Anterior and posterior margins of posterior sulcus with some lamellae projected into blunt spines. Microsculpture finely punctate. Protoconch (Inhaca specimen) ( Fig. 4W View FIG ): PI + PII = 190 µm, PI = 172 µm smooth, PII a narrow rim. Lunule short, deeply scooped, smooth. Ligament short, in shallow groove. Hinge teeth: right valve with single cardinal tooth, left valve with central socket, anterior cardinal possibly fused with edge of lunule; lateral teeth absent. Anterior adductor muscle scar short, detached for about 1/3 of length, posterior scar ovate. Pallial line entire. Inner shell margin coarsely dentate. Colour white.

REMARKS

This is a rare species in the western Indian Ocean and Red Sea. Despite intensive sampling ( Zuschin & Oliver 2003) there have been no other Red Sea records except that of Oliver & Abou-Zeid (1986). Around Mauritius, the species has not been recorded since Viader’s (1951) original description nor from intensive sampling around southern Madagascar (ATIMO VATAE Expédition MNHN 2010). The shell from Réunion illustrated as B. louisensis   (http://vieoceane.free.fr) is a species of Notomyrtea Iredale, 1924   but the Barbierella   sp. is B. louisensis   . Major features of the anatomy of B. scitula   were described and illustrated by Oliver & Abou-Zeid (1986). These features are common to most lucinids and include ctenidia with single demibranchs, vermiform foot, short length of posterior mantle fusion, the inhalant aperture fringed with papillae and the exhalant introvert ‘siphon’.

AMS

Australia, New South Wales, Sydney, Australian Museum

NMW

Austria, Wien, Naturhistorisches Museum Wien

NHMUK

NHMUK

NMW

Naturhistorisches Museum, Wien

NHMUK

Natural History Museum, London

MNHN

Museum National d'Histoire Naturelle

Kingdom

Animalia

Phylum

Mollusca

Class

Bivalvia

Order

Lucinoida

Family

Lucinidae

Genus

Barbierella

Loc

Barbierella louisensis ( Viader, 1951 )

Taylor, John D. & Glover, Emily A. 2018
2018
Loc

Barbierella louisensis

HUBER M. 2015: 430
2015
Loc

Lucina (Bellucina) louisensis

VIADER R. 1951: 133
1951
Loc

Barbierella scitula

Oliver & Abou-Zeid, 1986: 222