Radiolucina amianta
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Ordo: Veneroida
Familia: Lucinidae
Genus: Radiolucina
Name
Radiolucina amianta (Dall, 1901) – Wikispecies link – Pensoft Profile
- Phacoides (Bellucina) amiantus Dall, 1901: 826-827.
- Parvilucina (Radiolucina) amianta. — Britton, 1972: 9-10
- Lucina (Bellucina) amiantus Bretsky. — 1976: 273
Shell shape
Subovate, extended anteriorly and posteriorly, length longer than height, slightly inflated; maximum length: 6.0 mm, maximum height: 6.0 mm.
Sculpture and color
About 11 (n=2) non-bifurcating radial ribs, overlain by thin commarginal lamellae that continue through interspaces, producing a reticulate pattern; occasional intercalary ribs present; interspaces shallow, thin towards beak and progressively widening ventrally; anterior and posterior ends smooth with fine commarginal striae, posterior sometimes with spines of varying heights protruding from shell; inner shell margin finely crenulate; interior color tan, shiny.
Hinge
Hinge plate thick, curved on either side of cardinal teeth; beaks prosogyrate; cardinal teeth small, right valve posterior tooth thin, anterior tooth thick, left valve middle tooth wide; lateral teeth large, posterior tooth vertical, anterior tooth horizontal; ligament sunken above cardinal teeth.
Adductor scars and pallial line
Pallial line continuous; anterior adductor scar long, narrow, diverging from pallial line for about a quarter of its length; posterior adductor scar small, wide, pallial line joins at most ventral point.
Type specimens and type locality
Dall did not designate a single specimen as the holotype. To stabilize nomenclature, I herein designate the lectotype to be the right valve (USNM 64276), which is the same specimen as figured by Dall 1901[1], plate XXXIX fig. 10, with the type locality of Yucatan Strait, North Atlantic Ocean (approximately 21.3°N, 86.2°W), 1170 m (Fig. 4). An additional right valve (USNM 1183662) in the original lot is a paralectotype.
Distribution
Western Atlantic from North Carolina to Florida, West Indies, Gulf of Mexico, Caribbean Central America, South America south to Uruguay (Mikkelsen and Bieler 2007[2]).
Remarks
In describing Phacoides (Bellucina) amiantus, Dall noted that it seemed to be the same species that Tuomey and Holmes (1857)[3] had described as Lucina costata from the Pleistocene of South Carolina (non Lucina costata d’Orbigny, 1846). Boss et al. (1968[4]: 25) misinterpreted Dall’s proposal as a new name, but it is expressly a new species. Moreover, it is not at all clear that these represent the same species.
Literature
Dall (1901)[1], Bretsky (1976)[5], Mikkelsen and Bieler (2007)[2], Tunnell et al. (2010)[6].
Taxon Treatment
- Garfinkle, E; 2012: A review of North American Recent Radiolucina (Bivalvia, Lucinidae) with the description of a new species ZooKeys, 205: 19-31. doi
Other References
- ↑ 1.0 1.1 Dall W (1901) Synopsis of the Lucinacea and of the American species. Proceedings of the United States National Museum 23: 779-833. doi: 10.5479/si.00963801.23-1237.779
- ↑ 2.0 2.1 Mikkelsen P, Bieler R (2007) Seashells of Southern Florida: Living Marine Mollusks of the Florida Keys and Adjacent Regions. Princeton University Press, New Jersey, 236 pp.
- ↑ Tuomey M, Holmes F (1857) Pleiocene Fossils of South-Carolina containing descriptions and figures of the Polyparia, Echinodermata and Mollusca. Russell & Jones, Charleston, South Carolina, 152 pp.
- ↑ Boss K, Rosewater J, Ruhoff F (1968) The zoological taxa of William Healey Dall. United States Nation Museum, Bulletin 287, 427 pp.
- ↑ Bretsky S (1976) Evolution and Classification of the Lucinidae (Mollusca: Bivalvia). Palaeontographica Americana 50: 219-321.
- ↑ Tunnell J, Andrews J, Barrera N, Moretzsohn F (2010) Encyclopedia of Texas Seashells, identification, ecology, distribution, and history. Texas A&M University Press, Texas, 343 pp.
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