Toledonia perplexa Dall 1902
Creators
Description
Toledonia cf. perplexa Dall, 1902
Fig. 5M
Toledonia perplexa Dall, 1902: 513; Dell, 1990: 259, figs. 457–461 (synonymy)
Admete limneaeformis (sic)— Melvill & Standen, 1912: 131 (non Smith, 1879)
Examined material. 6 an. and 11 sh. (MACN-In 40707); holotype (USNM 109022).
Description. Shell height to 2.5 mm (up to 4.1 mm according to Dall 1902); elongate-ovate, delicate. Protoconch of 1.5 slightly convex whorls. Teleoconch of up to 2 whorls, slightly convex in outline; last whorl comprising about 85% of total shell height. Suture deep, slightly channeled. Surface white; only sculptured with faint growth lines. Aperture ovate, interior white; columella with a strong fold, callus narrow, slightly expanded over the umbilical area.
Remarks. Based on the study of shell morphology, Dell (1990) concluded that Toledonia limnaeaeformis (Smith, 1879) and T. perplexa are two different species, with only the latter present in Patagonian waters. The material studied here is similar to T. perplexa, although differs by having a lower spire. The significance of such differences could not be determined given the poor current state of knowledge of the group.
Notes
Files
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Linked records
Additional details
Identifiers
Biodiversity
- Family
- Diaphanidae
- Genus
- Toledonia
- Kingdom
- Animalia
- Order
- Cephalaspidea
- Phylum
- Mollusca
- Scientific name authorship
- Dall
- Species
- perplexa
- Taxon rank
- species
- Taxonomic concept label
- Toledonia perplexa Dall, 1902 sec. Luca & Zelaya, 2019
References
- Dall, W. H. (1902) Illustrations and descriptions of new, unfigured, or imperfectly known shells, chiefly American, in the U. S. National Museum. Proceedings of the United States National Museum, 24 (1264), 499 - 566, pls. 27 - 40.
- Dell, R. K. (1990) Antarctic Mollusca with special reference to the fauna of the Ross Sea. Bulletin of the Royal Society of New Zealand, 27, 1 - 311.
- Melvill, J. C. & Standen, R. (1912) The marine Mollusca of the Scottish National Antarctic Expedition. Part 2. Transactions of the Royal Society of Edinburgh, 48, 105 - 140, 1 pl.
- Smith, E. A. (1879) Mollusca. Transit of Venus Expedition. Philosophical transactions of the Royal Society of London, 168, 167 - 192. https: // doi. org / 10.1098 / rstl. 1879.0015