Pseudavena Sacco 1897

Abstract

Genus Pseudavena Sacco, 1897 Type species. Tornatina (Pseudavena) tauroglandula Sacco, 1897; original designation by Sacco (1897: 39). Early or Middle Miocene, Italy. Discussion. Pseudavena was established by Sacco (1897) as subgenus of Tornatina A. Adams, 1850 [= Acteocina J. E. Gray, 1847]. His diagnosis was very brief: “ It includes forms similar to Tornatina, but with the spire hidden by the last whorl of the spire, with a transversely striated surface and longitudinally plicate in the upper part.” (Sacco 1897: 39, translated from Italian). Pseudavena is characterized by slender to moderately broad subcylindrical shells with dome-shaped apex in which the first teleoconch whorl is covered partly by the subsequent whorl and by a peculiar spiral sculpture, which is most prominent along the shoulder and on the base. Utriculus spatha Watson, 1883, from the Caribbean Sea, might be a living representative of this genus (see Pilsbry 1895: 218, pl. 25, figs 53–55). Some extant species placed in Cylichnium Dall, 1908, type species Utriculus domitus Dall, 1889; present-day, Caribbean Sea, are reminiscent of Pseudavena. Cylichnium ancillarioides (Schepman, 1913), from Fiji, and Cylichnium nanum Valdés, 2008, from Vanatu, are comparable in outline and especially Cylichnium nanum is reminiscent of Pseudavena due to its spiral sculpture along the shoulder and the prominent columellar fold. In Cylichnium species, the last whorl covers the spire completely (see Valdés 2008: figs 55A–E, G–H).

Authors 3

1. Mathias Harzhauser

   Natural History Museum Vienna

   Affiliation as printed

   Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria mathias. harzhauser @ nhm. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655

2. Bernard Landau Aachen

   University of Lisbon · Instituto Dom Luiz · Naturalis Biodiversity Center

   Affiliation as printed

   Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, Netherlands; Instituto Dom Luiz da Universidade de Lisboa, Campo Grande, 1749 - 016 Lisboa, Portugal; and International Health Centres, Av. Infante de Henrique 7, Areias São João, P- 8200 Albufeira, Portugal bernardmlandau @ gmail. com; https: // orcid. org / 0000 - 0002 - 7768 - 8494

3. Manuel António E. Malaquias

   University of Bergen · Natural History Museum Vienna

   Affiliation as printed

   Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria mathias. harzhauser @ nhm. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655 & Department of Natural History, University Museum of Bergen, University of Bergen, PB 7800, 5020 - Bergen, Norway manuel. malaquias @ uib. no; http: // orcid. org / 0000 - 0002 - 9668 - 945 X & Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria mathias. harzhauser @ nhm. at; https: // orcid. org / 0000 - 0002 - 4471 - 6655