Anodontia (Euanodontia) hawaiensis
Creators: name: Glover, Emily A.
name: Taylor, John D.
Publisher: name: Zenodo
Year: 2007
Subjects: Biodiversity
Taxonomy
Animalia
Mollusca
Bivalvia
Lucinida
Lucinidae
Anodontia
Anodontia hawaiensis

description: Anodontia(Euanodontia)hawaiensis
(Dall, Bartsch & Rehder, 1938)
(Figs 2G, H; 3C)
Loripinus hawaiensis Dall, Bartsch & Rehder, 1938: 127, pl. 34, figs 11-12.
Lucina edentula – Kay 1979: 543, fig. 177a, b.
Anodontia (Euanodontia) hawaiensis – Taylor & Glover 2005: 312, figs 30, 31C, D.
TYPE MATERIAL. — Holotype (USNM 337404).
TYPE LOCALITY. — Honolulu harbor, 6-8 fathoms.
MATERIAL EXAMINED. — Koumac. 8 stn, 0-60 m, 16 v.
Touho. 3 stn, 0-4 m, 9 v.
Lifou. 22 stn, 0-30 m, 126 v, 5 live.
Chesterfield Islands. CORAIL 2, stn DW 60, 19°15’S, 158°57’E, 45 m, 1 v. — Stn DW 140, 19°34’S, 158°24’E, 57 m, 1 v.
Other New Caledonia. LAGON, stn 544, Grand Récif Sud, 22°51’S, 166°49’E, 25 m, 1 v. — Stn 1346, Grand Récif Abové, 5-6 m, 10 v. — Stn 1104, secteur des Belep, 19°42’S, 163°59’E, 22 m, 2 v. — Stn 1128, 19°31’S, 163°52’E, 26 m, 1 v. — Stn 1129, 19°29’S, 163°49’E, 40 m, 1 v. — Stn 1145, 19°21’S, 163°45’E, 38 m, 1 v. — Stn 1157, 19°10’S, 163°10’E, 48 m, 2 v. — Stn 449, Atoll de Surprise, 18°22’S, 163°09’E, 21 m, 2 v.
Loyalty Islands. MUSORSTOM 6, stn DW 430, 20°21’S, 166°07E, 30 m, 1 v.— Stn DW 433, 20°20’S, 166°09’E, 24 m, 1 v.— Stn DW 435, 20°21’S, 166°08’E, 32 m, 1 v.
DISTRIBUTION. — Probably widespread on islands and atolls of the Pacific with also a few records from islands in the Indian Ocean (see Taylor & Glover 2005).
DESCRIPTION
Small to medium sized,H to 23.2 mm, L to 25.6 mm, sub-circular, anterior extended, posterior margin often truncated, inflatedT/L 0.35. Outer shell surface smooth with growth halts, fine radial striations. Shell white, sometimes with yellowish umbonal area. Juvenile shells often with translucent flecks. Lunule small, heart-shaped. Ligament internal, set in shallow groove. Hinge line narrow, edentulous. Anterior adductor muscle scar medium length, widely detached from the pallial line at an angle of 35°. Anterior muscle scar often lobate along dorsal edge and divided transversely into irregular blocks. Pallial line entire, frequently with irregular thickening beneath the anterior adductor scar. Shell surface within the pallial line dull, often with radial grooves and circular mantle attachment sites. Shell margin glossy with fine radial ridges.
REMARKS
The most closely similar species, A. ovum, is generally larger, has a more circular shell, is less inflated, has a more deeply inset ligament, a longer anterior adductor scar which is not divided or lobate as in A. hawaiensis and the pallial line lacks the anterior thickening. Although the species may be common, all of the material examined from major museum collections consists of dead-collected and often worn shells. Th e species was originally described from Hawaii and shells from there are usually smaller (<13.0 mm in height).
description: Published as part of Glover, Emily A. & Taylor, John D., 2007, Diversity of chemosymbiotic bivalves on coral reefs: Lucinidae (Mollusca, Bivalvia) of New Caledonia and Lifou, pp. 109-181 in Zoosystema 29 (1) on pages 114-115, DOI: 10.5281/zenodo.5392295