Asthenotoma

{{Short description|Extinct genus of gastropods}} {{Automatic taxobox | fossil_range = | image = Asthenotoma lamothei 001.jpg | image_caption = Shell of ''Asthenotoma lamothei'' | display_parents = 3 | taxon = Asthenotoma | authority = Harris & Burrows, 1891 | type_species= †''Pleurotoma meneghinii'' | type_species_authority = Mayer, 1868 | synonyms_ref = | synonyms = † ''Oligotoma'' Bellardi, 1875 (Invalid: junior homonym of ''Oligotoma'' Westwood, 1836; ''Asthenotoma'' is a replacement name) }}

'''''Asthenotoma''''' is a genus of sea snails, marine gastropod mollusks in the family Borsoniidae.<ref name="WoRMS">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</ref>

==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''.<ref>[https://www.biodiversitylibrary.org/page/2927060 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] {{PD-notice}}</ref>

==Species== Species within the genus ''Asthenotoma'' include: * † ''Asthenotoma angusta'' Lozouet, 2017 * † ''Asthenotoma bipunctula'' (S. V. Wood, 1848) * † ''Asthenotoma colus'' (Dujardin, 1837) * † ''Asthenotoma conulus'' (Grateloup, 1845) * † ''Asthenotoma crenulata'' Gougerot, 1966 <ref>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</ref> * † ''Asthenotoma falunica'' Peyrot, 1938 * † ''Asthenotoma festiva'' (Hörnes, 1854) * † ''Asthenotoma juvenilis'' Lozouet, 2015 * † ''Asthenotoma lamothei'' (Dautzenberg, 1910) * † ''Asthenotoma lanceolata'' Ceulemans, Van Dingenen & Landau, 2018 * † ''Asthenotoma ligata'' (Defrance, 1826) * † ''Asthenotoma meneghinii'' (Mayer, 1868) * † ''Asthenotoma newtoni'' de Boury, 1899 * † ''Asthenotoma ornata'' (Defrance, 1826) * † ''Asthenotoma pannus'' (Basterot, 1825) * † ''Asthenotoma praepannus'' Lozouet, 2017 * † ''Asthenotoma pupa'' (Edwards, 1861) * ''Asthenotoma texta'' (Thiele, 1925) (original combination: ''Turris (Hemipleurotoma) texta'') * † ''Asthenotoma tuberculata'' (Pusch, 1837) * † ''Asthenotoma vulcani'' Lozouet, 2017 ;Taxon inquirendum: * ''Oligotoma sirpata'' Jousseaume, 1891 ;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 eva'' (Thiele, 1925): synonym of ''Maoritomella eva'' (Thiele, 1925) * †''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== {{Reflist}}

==External links== {{Commons category|Asthenotoma}} * [https://biodiversitylibrary.org/page/13815192 Harris G. F. & Burrows H. W. (1891). The Eocene and Oligocene beds of the Paris basin. Geologists' Association, London 129 pp.: page(s): 113] * [https://www.biodiversitylibrary.org/item/124597#page/24/mode/1up Bellardi L. (1875). ''Novae pleurotomidarum Pedimonti et Liguriae fossilium: dispositionis prodromus.'' Bullettino della Società Malacologica Italiana. 1: 16-24] * [https://dx.doi.org/10.1093/mollus/eyr017 Bouchet, P.; Kantor, Y. I.; Sysoev, A.; Puillandre, N. (2011). ''A new operational classification of the Conoidea.'' Journal of Molluscan Studies. 77, 273-308] * [https://science.mnhn.fr/institution/mnhn/collection/im/item/2000-2875 MNHN, Paris: ''Asthenotoma crenulata'']

Category:Asthenotoma