Limatula laminifera
- 1. Departamento de Zoologia, Instituto de Biologia, Centro de Ciências da Saúde, Universidade Federal do Rio de Janeiro, Ilha do Fundão, 21941 - 590 Rio de Janeiro, Rio de Janeiro, Brasil Departamento de Zoologia, Universidade do Estado do Rio de Janeiro, Avenida São Francisco Xavier 524, Maracanã, 20550 - 900 Rio de Janeiro, Rio de Janeiro, Brasil
Description
Figure 16
Lima (Limatula) laminifera Smith, 1885: p. 293, pl. XXIV, fig. 7, 7a.
Limatula laminifera: Stuardo, 1968: p. 226. pl. 14, fig. 65; Abbott, 1974: p. 454; Allen, 2004: p. 2616. fig. 29–32, 46b.
Description: Shell fragile, white, small (height mean = 2.15mm ± 0.17 s.d.; range 2.04–2.40mm; n=4), height/length ratio 1.37, equivalve, slightly inequilateral, moderately inflated. Ornamented with very fine, irregularly spaced concentric striae and slender concentric lamellae, which become more foliaceous toward the ventral margin. Internally with two thickened axial ridges, which correspond to two internal grooves in the opposite valve. Auricles relatively small, subauricular sinus hardly visible. Dorsal margin straight and little inclined from antero-posterior axis. Prodissoconch barely visible (mean 95.00µm ± 5.77 s.d.; range 90– 100µm; n=4), interdissoconch not distinguishable. Umbones prominent and triangular. Hinge plate narrow, edentulous, with an elongated triangular ligamental pit.
Geographic range: Western North Atlantic, Florida to the West Indies, off the Azores, off Fernandina, off Sombrero Island, off Culebra Island. Depths ranging between 137 to 1590 meters. Adapted from Smith (1885), Abbott (1974), Allen (2004). Campos Basin (this study) represents the first record of this species for the Brazilian coast and for the southeastern Atlantic Ocean.
Material examined: IBUFRJ 17808, off Bacia da Foz do Amazonas (03º25 'N, 48º03' W, 700 m), 14.XII.05, [1 valve]; IBUFRJ 17823, off Bacia da Foz do Amazonas (03º25 'N, 48º03' W, 700 m), 14.XII.05, [4 valves].
Remarks: Both the original description of L. laminifera (Smith 1885) and a later redescription (Allen 2004) pointed out the near absence of axial sculpture, except for very faint lirae that may occur on the central portion of the valves. In fact, the axial sculpture is barely visible in our specimens.
Notes
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Linked records
Additional details
Identifiers
Related works
- Is part of
- Journal article: http://publication.plazi.org/id/FFD4597A8413FF8DFF91FFE9FFBAD06E (URL)
- Is source of
- https://sibils.text-analytics.ch/search/collections/plazi/03ED21028414FF8AFF06FEB6FBE4D492 (URL)
Biodiversity
- Family
- Limidae
- Genus
- Limatula
- Kingdom
- Animalia
- Order
- Limoida
- Phylum
- Mollusca
- Scientific name authorship
- Smith
- Species
- laminifera
- Taxon rank
- species
- Taxonomic concept label
- Limatula laminifera (Smith, 1885) sec. Oliveira & Absalão, 2008
References
- Smith, E. A. (1885) Report on the Lamellibranchiata collected by H. M. S. Challenger during the years 1873 - 76. Challenger Reports, Zoology. 13, 1 - 341, 1 - 25 pls.
- Stuardo, J. (1968) On the phylogeny, taxonomy and distribution of the Limidae (Mollusca: Bivalvia). PhD thesis, Harvard University, Cambridge, MA, USA, 327 pp.
- Abbott, R. T. (1974) American Seashells. 2 nd. Van Nostrand Reinhold Co., New York, 411 pp.
- Allen, J. A. (2004) The Recent species of the genera Limatula and Limea (Bivalvia, Limacea) present in the Atlantic, with particular reference to those in deep water. Journal of Natural History, 38, 2591 - 2653.