Asthenotoma

Asthenotoma is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.[1]

Asthenotoma
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Subclass: Caenogastropoda
Order: Neogastropoda
Superfamily: Conoidea
Family: Borsoniidae
Genus: †Asthenotoma
Harris & Burrows, 1891
Type species
†Pleurotoma meneghinii
Mayer, 1868
Synonyms

† Oligotoma Bellardi, 1875 (Invalid: junior homonym of Oligotoma'' Westwood, 1836; Asthenotoma is a replacement name)

Description

This genus, almost entirely represented by extinct species, is of slender form and elevated, evenly and gradually acuminate spire, conspicuous development of the spiral lyrae and short aperture. It should evidently be considered especially with Trypanotoma and allies, but it is somewhat of an annectant form, as the American species at least have true ribbing on the nepionic whorls which becomes completely lost on the larger volutions of the shell. It is therefore one of those puzzling exceptions which render an arrangement of the genera in a dichotomous table so difficult and unsatisfactory. The embryo in the type, Pleurotoma basteroti Desm., of the European Miocene, is said by Cossmann to be paucispiral, but the drawing shows a multispiral protoconch. This is, however, a matter of minor importance. The anal sinus is broad, sometimes very feeble and always median in position on the spire whorls though not identified with any particular one or more of the subequal and rather coarse flat spirals. The beak has no external oblique tumidity. There can be but little doubt, in view of geographical variations and wide distribution of this genus, that Endiatoma, of Cossmann, should be regarded as a synonym or as constituting a slightly differentiated section of Asthenotoma. [2]

Species

Species within the genus Asthenotoma include:

  • † Asthenotoma angusta Lozouet, 2017
  • † Asthenotoma conulus (Grateloup, 1845)
  • † Asthenotoma crenulata Gougerot, 1966 [3]
  • † Asthenotoma juvenilis Lozouet, 2015
  • Asthenotoma lamothei (Dautzenberg, 1910)
  • † Asthenotoma meneghinii (Mayer, 1868)
  • † Asthenotoma pannus (Basterot, 1825)
  • † Asthenotoma praepannus Lozouet, 2017
  • Asthenotoma texta (Thiele, 1925) (original combination: Turris (Hemipleurotoma) texta)
  • † Asthenotoma vulcani Lozouet, 2017
Synonyms
  • Subgenus Asthenotoma (Drilliola) Locard, 1897: synonym of Drilliola Locard, 1897
  • Asthenotoma (Drilliola) emendata (Monterosato, 1872): synonym of Drilliola emendata (Monterosato, 1872)
  • Asthenotoma cicatrigula Hedley, 1922: synonym of Tomopleura cicatrigula (Hedley, 1922)
  • †Asthenotoma exbasteroti Peyrot, 1931: synonym of † Drilliola basteroti'' (Des Moulins, 1842)
  • Asthenotoma komakimonos Otuka, 1935: synonym of Pulsarella komakimonos (Otuka, 1935)
  • † Asthenotoma obesa Peyrot, 1931: synonym of † Drilliola obesa (Peyrot, 1931)(original combination)
  • Asthenotoma spiralis (E. A. Smith, 1872): synonym of Tomopleura spiralissima Gofas & Rolán, 2009
  • Asthenotoma subtilinea Hedley, 1918: synonym of Tomopleura subtilinea (Hedley, 1918)
  • † Asthenotoma tricarinata Peyrot, 1931: synonym of † Boettgeriola tricarinata (Peyrot, 1931) (original combination)
  • Asthenotoma vertebrata (E. A. Smith, 1875): synonym of Tomopleura vertebrata (E. A. Smith, 1875)

References
  1. Bouchet, P. (1970). Asthenotoma. In: MolluscaBase (2015). Accessed through: World Register of Marine Species at http://www.marinespecies.org/aphia.php?p=taxdetails&id=224458 on 2016-02-08
  2. Casey T.L. (1904) Notes on the Pleurotomidae with description of some new genera and species. Transactions of the Academy of Science of St. Louis, 14, 123–170 This article incorporates text from this source, which is in the public domain.
  3. Gougerot, L., 1966. - Présentation de cinq espèces nouvelles et de nouveaux représentants de gastéropodes dans le Lutétien et le Bartonien du Bassin de Paris. Bulletin de la Société Géologique de France 7("1965"): 296-301, sér. 7 série
  • Harris G. F. & Burrows H. W. (1891). The Eocene and Oligocene beds of the Paris basin. Geologists' Association, London 129 pp.: page(s): 113


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