Aplus undetermined

Autor: Sacchetti, Claudia, Landau, Bernard, Ávila, Sérgio P.
Rok vydání: 2023
Předmět:
DOI: 10.5281/zenodo.7975965
Popis: Aplus sp. Plate 5 E 1 -E 2 Santa Maria material examined. Maximum height 7.5 mm, width 4.0 mm. One specimen from LNEG collection (unnumbered), Ponta do Castelo, Santa Maria Island, Azores, Touril Complex, Lower Pliocene. Description. Shell small for genus, fusiform. Protoconch missing.Teleoconch of three convex whorls, somewhat swollen in the abapical half, suture moderately impressed, undulating. Sculpture of eight broad, rounded prosocline ribs, slightly wider than their interspaces, overrun by three spiral cords on spiral whorl, adapical cord weaker, abapical tubercles of equal strength, most abapical form in periphery. Last whorl convex, weakly constricted at base, bearing a single secondary between the primary cords below mid whorl. Close-spaced prosocline growth lines give interspaces between cords slightly scabrous appearance. Aperture and siphonal fasciole incomplete. Discussion. In the LNEG collection is a single specimen of Aplus sp. from Ponta do Castelo. The specimen is incomplete, missing its apex and part of its aperture. The genus Aplus De Gregorio, 1885 in the Italian Plio-Pleistocene was revised by Brunetti & Della Bella (2014). The Azorean specimen is most like A. ansus (De Gregorio, 1884) but differs in not having angular whorls, and A. plioparvus (Sacco, 1904) which is similar in profile but has more numerous spiral cords. Further determination is not possible based on the material available. Distribution. Lower Pliocene: Atlantic, Santa Maria Island, Azores (this paper).
Published as part of Sacchetti, Claudia, Landau, Bernard & Ávila, Sérgio P., 2023, The Lower Pliocene marine gastropods of Santa Maria Island, Azores: Taxonomy and palaeobiogeographic implications, pp. 1-150 in Zootaxa 5295 (1) on pages 74-75, DOI: 10.11646/zootaxa.5295.1.1, http://zenodo.org/record/7965273
{"references":["Gregorio, A. De (1885) Continuazione degli studi su talune conchiglie mediterranee vivente e fossili. Bullettino della SocietaI Malacologica Italiana, 11, 27 - 203.","Brunetti, M. M. & Della Bella, G. (2014) La famiglia Buccinidae Rafinesque, 1815 nel Plio-Pleistocene italiano: il genere Aplus De Gregorio, 1884, Engina Gray, 1839 e Gemophos Olsson & Harbison, 1953 (Gastropoda). Bollettino Malacologico, 40, 11 - 32.","Gregorio, A. De (1884) Studi su alcune conchiglie mediterranee viventi e fossili con una rivista del genere Vulsella. Bollettino della Societa Malacologica Italiana, 10, 36 - 72.","Sacco, F. (1904) I Molluschi dei terreni terziari del Piemonte e della Liguria. 30. Aggiunte e correzioni. Considerazioni generali. Indice generale dell'opera (con 1400 figure). Carlo Clausen, Torino, xxxvi + 203 pp., 31 pls."]}
Databáze: OpenAIRE
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