Meteuthria martensi Strebel 1905

• Main Author: Pastorino, Guido
• Format: Text
• Language: unknown
• Published: Zenodo 2016
• Subjects: Biodiversity; Taxonomy; Animalia; Mollusca; Gastropoda; Neogastropoda; Buccinidae; Meteuthria; Meteuthria martensi; Antarctic; Argentina; Drygalski; Guido; Reimer; Ushuaia; Antarc*; Antarktis*; Tierra del Fuego
• Online Access: https://dx.doi.org/10.5281/zenodo.5662392; https://zenodo.org/record/5662392

Meteuthria martensi (Strebel, 1905) Figures 11 A–K, 12A–E Euthria Glypteuthria martensi Strebel, 1905: 630, pl. 21, figs. 13, 13 a, b. Euthria Glypteuthria agnesia Strebel, 1905: 631, pl. 21, figs. 14, 14 a, b, c. Meteuthria martensi (Strebel). Thiele, 1912: 243, pl. 13, fig. 7, pl. 16, fig. 18; Powell, 1951: 149, fig. K62; Castellanos, 1992: 20, pl. 1, fig. 8 (only). Meteuthria agnesia (Strebel). Dell, 1971: 206. Type material. [ Euthria Glypteuthria martensi ] the following lots, housed at the ZMH collection should be regarded as syntypes: 1 spm., Magellan Straits, Borja Bay, SE 6201 (1167); 3 spms., Puerto Harris, 10 fms [18.3 m] depth, SE 6193; 4 spms., Ebendaher, 15 fms. [27.4 m] depth, SE 6192; 3spms., Puerto Condor, SE 6208; 1 spm., Basket Is., M 108; 2 spms., Voilier Cove, 10 fms. [18.3 m] depth, SE 6216 (661); 2 spms., Ushuaia, 5 fms., [9.1 m] depth, M124; 2spms., Ushuaia, 10 fms. [18.3 m] depth, M122; 1 spm., Ushuaia, 12–15 fms. [21.9-27.4 m] depth, SE 6220 (786); this specimen (Figs 10A–C) is here designated as lectotype in order to preserve stability of nomenclature, in agreement with ICZN article 74. [ Euthria Glypteuthria agnesia ] 1 spm., Picton Is., Banner Cove, 3 fms. [5.4 m] depth, M 168. Type locality. Ushuaia, Tierra del Fuego, Argentina, here selected. Description. Shell small, up to 12 mm in height, fusiform, of five slightly convex whorls; protoconch (Figs 11 J, K) of about 2 convex whorls, translucent with quite distinctive closely spaced axial threads overall, transition to teleoconch weakly defined; suture impressed, slightly channelled; aperture oval, labrum thick; siphonal canal rather deep, oblique and long; parietal callus thin; growth lines close spaced over the entire shell; spiral ornamentation of thick threads, 4 on the first two whorls, 5 to 6 on the others; axial sculpture of 13 to 15 varices, which develop nodes when crossing the spiral threads; periostracum translucent, yellowish to brownish; colour chalky whitish, some specimens darker. Operculum (Fig. 11 I), pale yellowish, shape ovate-elliptical, nucleus subterminal, attachment area towards left side. Radula (Figs 12 A–C) with rachidian teeth absent. Laterals triangular, Prosipho -like or fan shaped (basal plate with “handle”), with four major, slightly curved, cusps pointing towards the center of the ribbon, sometimes 2 to 3 very small cusps on the outer side of the teeth. Penis large, flat, with a thick, blunt papilla rising from a cavity (Figs 12 D–E). Material examined. Argentina: 1 shell, 35°30’S, 53°10’W, 91.5 m depth, (MACN-In 15611); 1 shell, 35°42’S, 54°40’W, 128–138 m depth, (MACN-In 15827); 1 spm., 39°S, 58°W, about 600 m depth, (MACN-In 32893); 3 shell, 4 spms., Ushuaia, (MACN-In 40519); 1 spm., 54º51.596’S, 68º31.618’W, Tierra del Fuego, 25 m depth, (MACN-In 40521); 4 spms., 55°6.26’S, 66°28.14’W, 71 m depth, (MACN-In 40520). Chile: 1 shell, 52°41’S, 74°35’W, 188–247 m depth, (USNM 898754); 1 spm., 1 shell, Rada Picton Is., 27.5 m depth, (MACN-In 35132). Distribution. Straits of Magellan and Beagle Canal, Tierra del Fuego in shallow waters; off Buenos Aires in more than 100 m depth. Remarks. This uncommon species was included by Strebel in Glypteuthria because of the similarity of its shell to that of G. meridionalis . However, the radula, as stated by Thiele (1912), is different enough to justify his new genus Meteuthria . In addition, the protoconch with axial threads is also quite distinctive. One syntype of Euthria agnesia Strebel, a very damaged specimen, (illustrated in Fig. 11 D–E) was the basis on which the two species were synonymized. : Published as part of Pastorino, Guido, 2016, Revision of the genera Pareuthria Strebel, 1905, Glypteuthria Strebel, 1905 and Meteuthria Thiele, 1912 (Gastropoda: Buccinulidae) with the description of three new genera and two new species from Southwestern Atlantic waters, pp. 301-344 in Zootaxa 4179 (3) on pages 319-321, DOI: 10.11646/zootaxa.4179.3.1, http://zenodo.org/record/256431 : {"references": ["Strebel, H. (1905) Beitrage zur Kenntnis der Molluskenfauna der Magalhaen-Provinz. 3. Zoologischen Jahrbuchern. Abteilung fur Systematik, Geographie, und Biologie der Tiere, 22 (6), 575 - 666.", "Thiele, J. (1912) Die Antarktischen Schnecken und Muscheln, Deutsche Sudpolar-Expedition (1901 - 1903) Im auftrage des Reichsamtes des Innern Herausgegeben von Erich von Drygalski Leiter der Expedition. Vol. 13. In: Zoologie 5 (2). Druck und Verlag von Georg Reimer, Berlin, pp. 183 - 286", "Powell, A. W. B. (1951) Antarctic and subantarctic Mollusca: Pelecypoda and Gastropoda. Discovery Reports, 26, 47 - 196. http: // dx. doi. org / 10.5962 / bhl. part. 16335", "Castellanos, Z. J. A. de (1992) Catalogo descriptivo de la malacofauna marina magallanica 7. Neogastropoda Columbellidae = Pyrenidae, Cominellidae y Fasciolariidae. Comision de Investigaciones Cientificas de la Provincia de Buenos Aires, La Plata, 41 pp.", "Dell, R. K. (1971) The marine Mollusca of the Royal Society Expedition to southern Chile, 1958 - 1959. Records of the Dominion Museum, 7 (17), 155 - 233."]}