Trabecula (gastropod)

Trabecula
shell of Trabecula aequilibritas (holotype at MNHN, Paris)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subcohort:	Panpulmonata
Superfamily:	Pyramidelloidea
Family:	Pyramidellidae
Genus:	Trabecula Monterosato, 1884 [1]
Type species
Trabecula jeffreysiana Monterosato, 1884
Synonyms[2]
Chrysallida (Trabecula) Monterosato, 1884 Odostomia (Salassiella) Dall & Bartsch, 1909 (a junior synonym) Salassiella Dall & Bartsch, 1909

Trabecula is a genus of very small sea snails, marine gastropod molluscs or micromolluscs in the family Pyramidellidae, the pyrams and their allies, and the subfamily Chrysallidinae, a large taxon of minute marine gastropods with an intorted protoconch.[2]

Taxonomy

Dall & Bartsch (1904: 10) misinterpreted this genus and described it with “intercostal spaces crossed by equally spaced, raised spiral threads, sculpture reticulated”, despite that Monterosato (1884) wrote that there is no apparent spiral sculpture. This may explain why Dall & Bartsch (1909) described a new genus Salassiella with a type species extremely similar to that of Trabecula

General description

The whorls of the teleoconch are rounded, and longitudinally lamellose. The aperture is semicircular, with an exterior rib. There is no apparent spiral sculpture. The apex is retrorse. The columella lacks a fold or tooth.[3]

Species

• Trabecula abei (Nomura, 1938)
• Trabecula aequilibritas Peñas & Rolán, 2017
• † Trabecula awaeusis (Nomura, 1938)
• †Trabecula hossakuensis (Nomura, 1938)
• Trabecula jeffreysiana Monterosato, 1884
• Trabecula kronenbergi (van Aartsen, Gittenberger & Goud, 2000)
• Trabecula krumpermani (Jong & Coomans, 1988)
• Trabecula laxa (Dall & Bartsch, 1909) (synonym : Odostomia (Salasiella) laxa Dall & Bartsch, 1909)
• † Trabecula numaensis (Nomura, 1938)
• † Trabecula perpupoidea (Nomura, 1938)
• Trabecula tani (Saurin, 1959)
• Trabecula tantilloides (Nomura, 1938)
• Trabecula truncatelliformis (Hori & Fukuda, 1999)
• Trabecula yositunei (Nomura, 1938)

Species brought into synonymy

• Trabecula montforti (Corgan, 1972): synonym of Nesiodostomia montforti Corgan, 1972
• Trabecula plicata (A. Adams, 1860): synonym of Pyrgulina plicata (A. Adams, 1860)
• Trabecula punctigera (A. Adams, 1860): synonym of Linopyrga punctigera (A. Adams, 1860)
• Trabecula tantilla (A. Adams, 1863): synonym of Linopyrga tantilla (A. Adams, 1863)

References

1. Monterosato T. A. (di) (1884). Nomenclatura generica e specifica di alcune conchiglie mediterranee. Palermo, Virzi pp. 152 [month of publication unknown, but later than february (the paper in Naturalista Siciliano, cited p. 57); copy in Smithsonian Institution bears manuscript note "after August,
2. WoRMS (2010). Trabecula Monterosato, 1884. In: Bouchet, P.; Gofas, S.; Rosenberg, G. (2010) World Marine Mollusca database. Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=416081 on 28 August 2012
3. G.W. Tryon, Manual of Conchology vol. VIII p. 317-318; 1886

• Pimenta, A.D., Absalão, R.S. & Miyaj i, C. 2009. A taxonomic review of the genera Boonea, Chrysallida, Parthenina, Ivara, fargoa, Mumiola, Odostomella and Trabecula (Gastropoda, Pyramidellidae, Odostomiinae) from Brazil. Zootaxa 2049: 39−66.

External links

• Monterosato, T. A. di. (1884). Nomenclatura generica e specifica di alcune conchiglie mediterranee. Virzi, printed for the author, Palermo, 152 pp.
• Dall W.H. & Bartsch P. 1909. A Monograph of West American Pyramidellid Mollusks. Bulletin, United States National Museum, 68: i-xii, 1-258, 30 pl.

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