Ancistrobasis costulata Watson 1879

• Main Authors: Salvador, Rodrigo B., Cavallari, Daniel C., Simone, Luiz R. L.
• Format: Text
• Language: unknown
• Published: Zenodo 2014
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Seguenziida; Seguenziidae; Ancistrobasis; Ancistrobasis costulata; Pacific; Renard; Abbott; Suo; Montague; North Atlantic
• Online Access: https://dx.doi.org/10.5281/zenodo.6138448; https://zenodo.org/record/6138448

Ancistrobasis costulata (Watson, 1879) (Figs. 1–3) Basilissa costulata Watson, 1879: 600. Basilissa (Ancistrobasis) costulata : Abbott, 1974: 37. Ancistrobasis costulata : Quinn, 1983 b: 729; Benkendorfer & Soares-Gomes, 2009: 151; Rios, 2009: 72 (textfig.); Rosenberg et al ., 2009: 622. Ancistrobasis reticulata : Gofas et al ., 2001: 184. Type locality: The three juvenile syntypes (Watson 1879) stem from the H.M.S. Challenger Expedition Station 24 (25 /iii/ 1873), off Culebra Island (Puerto Rico) and St. Thomas (United States Virgin Islands), ca. 710 m of depth. Distribution: From Georgia, USA, to southern Brazil, ca. 27–1170 m depth (Rios 2009; Rosenberg et al . 2009). Records in Brazil: Rio de Janeiro, off Cabo Frio, 70 m, and off Rasa Island, 120 m; São Paulo, off Santos, 150 m; Rio Grande do Sul, off Tramandaí, 150 m (Rios 2009). New occurrence: Off Espírito Santo, 250–940 m depth. Description: Shell small, conical, relatively thick-walled. Color homogeneous white to beige, often with diffuse, darker blotches. Protoconch (~ 1 whorl) rounded, with pitted surface; transition visible as orthocline suture. Teleoconch sculpture (except whorl base) consisting of reticulate pattern of axial and spiral cords, with marked angular nodules at intersections. Base of body whorl sculptured by numerous (8–10) spiral ribs, which may be ornamented by nodules near umbilical periphery and peristome. Whorls slightly convex. Suture deep, well-marked. Aperture quadrangular, with strong columellar and strong basal teeth. Umbilicus wide, deep; umbilical crenae nodulose, well-marked, but not too strong. Measurements (in mm): 6 – 6 ½ whorls, H = 4.4 ± 0.3, D = 5.9 ± 0.5, h = 1.6 ± 0.2, d = 2.4 ± 0.3. Material examined: Brazil: Espírito Santo: off São Mateus, continental slope of Abrolhos, 18 ° 59 ’S 37 ° 50 ’W, 295 m, MNHN, 8 shells, MZSP 116288, 2 shells (MD 55, sta. DC75, 27/v/ 1987); 18 ° 59 ’S 37 ° 48 ’W, 607–620 m, MNHN, 9 shells, MZSP 116289, 4 shells (MD 55, sta. DC73, 27/v/ 1987); 19 ° 40 ’S 37 ° 48 ’W, 790–940 m, MNHN, 1 shell (MD 55, sta. CB77, 27/v/ 1987); Montague Bank, 20 ° 26 ’S 36 ° 41 ’W, 525–600 m, MNHN, 1 shell (MD 55, sta. DC28, 14/v/ 1987); Columbia Bank, 20 ° 44 ’S 32 °08’W, 250–300 m, MNHN, 1 shell (MD 55, sta. DC48, 19/v/ 1987). Remarks: The present specimens compare well to Ancistrobasis costulata from the North Atlantic. Previous Brazilian records are from Rio de Janeiro, São Paulo and Rio Grande do Sul states (Rios 2009). The present records expand the known distribution of this species in Brazil ca. 450 km northward to Espírito Santo state. Ancistrobasis costulata has lately ( e.g. , Rosenberg 2013) been considered to represent a synonym of A. reticulata (Philippi, 1844), a species originally described from fossil material from the Pliocene of Italy (Philippi 1844; Quinn 1983 b). We consider that simply synonymizing these species without a thorough revision of both fossil and recent taxa, is problematic and, thus, we prefer a more conservative classification of the present material. : Published as part of Salvador, Rodrigo B., Cavallari, Daniel C. & Simone, Luiz R. L., 2014, Seguenziidae (Gastropoda: Vetigastropoda) from SE Brazil collected by the Marion Dufresne (MD 55) expedition, pp. 536-550 in Zootaxa 3878 (6) on page 537, DOI: 10.11646/zootaxa.3878.6.2, http://zenodo.org/record/226061 : {"references": ["Watson, R. B. (1879) Mollusca of H. M. S. ' Challenger' Expedition. III Trochidae, viz. the genera Seguenzia, Basilissa, Gaza and Bombix. Journal of the Linnean Society of London, Zoology, 14, 586 - 605.", "Abbott, R. T. (1974) American Seashells: The Marine Mollusca of the Atlantic and Pacific Coasts of North America. 2 nd Edition. Van Nostrand Reinhold Company, New York, 663 pp.", "Quinn, J. F. Jr. (1983 b) A revision of the Seguenziacea Verrill, 1884 (Gastropoda: Prosobranchia). I. Summary and evaluation of the Superfamily. Proceedings of the Biological Society of Washington, 96 (4), 725 - 757.", "Benkendorfer, G. & Soares-Gomes, A. (2009) Biogeography and biodiversity of gastropod molluscs from the eastern Brazilian continental shelf and slope. Latin American Journal of Aquatic Research, 37 (2), 143 - 159. http: // dx. doi. org / 10.3856 / vol 37 - issue 2 - fulltext- 3", "Rios, E. C. (2009) Compendium of Brazilian Sea Shells. Evangraf, Rio Grande, 668 pp.", "Rosenberg, G., Moretzsohn, F. & Garcia, E. F. (2009) Gastropoda (Mollusca) of the Gulf of Mexico. In: Felder, D. L. & Camp, D. K. (Eds.), Gulf of Mexico: Origins, Waters, and Biota. Biodiversity. Texas A & M University Press, Texas, pp. 579 - 699.", "Gofas, S., Le Renard, J. & Bouchet, P. (2001) Mollusca. In: Costello, M. J., Emblow, C. & White, R. (Eds.), European Register of Marine Species: A Check-List of the Marine Species in Europe and a Bibliography of Guides to Their Identification. Publications Scientifiques du M. N. H. N., Collection Patrimoines Naturels 50, Paris, pp. 180 - 213.", "Rosenberg, G. (2013) Ancistrobasis costulata (Watson, 1879), World Register of Marine Species. Available from: http: // www. marinespecies. org / aphia. php? p = taxdetails & id = 419396 (accessed 18 February 2014)", "Philippi, R. A. (1844) Enumeratio molluscorum Siciliae cum viventium tum in tellure tertiaria fossilium, quae in itinere suo observavit. Vol. 2. Eduard Anton, Halle, 303 pp."]}