Cancilla Swainson, 1840

Harzhauser, Mathias & Landau, Bernard, 2021, The Mitridae (Gastropoda: Neogastropoda) of the Miocene Paratethys Sea, Zootaxa 4983 (3), pp. 1-72 : 50

publication ID	https://doi.org/10.11646/zootaxa.4983.1.1
publication LSID	lsid:zoobank.org:pub:6A4778D6-195A-4AB1-AA1E-7D8000185B28
DOI	https://doi.org/10.5281/zenodo.5044064
persistent identifier	https://treatment.plazi.org/id/A82A87E9-8A27-387C-FF4D-FC5CFA5FF80E
treatment provided by	Plazi (2021-06-10 00:51:57, last updated 2024-11-24 21:02:59)
scientific name	Cancilla Swainson, 1840
status

Treatment

Genus Cancilla Swainson, 1840 View in CoL

Type species. Mitra isabella Swainson, 1831 View in CoL , subsequent designation by Herrmannsen (1846: 166). Present-day, Indo-Pacific.

Diagnosis. “ Shell small to rather large (15–110 mm), fusiform, with high aperture and long, tapering siphonal canal. Protoconch conical, of about three very slightly convex smooth whorls. Spire whorls evenly convex to subcylindrical; suture distinct, impressed. Shell sculptured with spiral cords that are slightly gemmate or with finely dentate margins, very wide and flat, separated by narrow grooves, or with strong, narrow and elevated cords separated by broad depressions bearing regular, very fine riblets. Shell base gradually extended into rather long, tapering siphonal canal. Siphonal fasciole not pronounced, notch deep or shallow. Aperture elongate, narrow; outer aperture lip smooth, gently convex adapically, and flattened in its lower portion. Inner lip with four oblique columellar folds, adapicalmost strongest. Shell pale or cream, typically with multiple darker spiral strokes on crests of spiral cords ” ( Fedosov et al., 2018: 54).

Present-day distribution. Indo-West Pacific ( Fedosov et al. 2018).

See Table 2 View TABLE 2 for morphometric data of all Paratethyan Cancilla species.

Key to Cancilla species in the Paratethys

1. Cancellate sculpture spire whorls......................................................................... 2 Spiral sculpture only................................................................................... 3

2. Cancellate sculpture weak, restricted to earliest whorl......................................... C. praescrobiculata Cancellate View in CoL sculpture strong, persisting to penultimate whorl......................................... C. pulcherrima View in CoL

3. Spiral sculpture of fine spirals........................................................................... 4 Spiral sculpture of flattened cords........................................................................ 5 Strong elevated cords, relatively broad, cancellate interspaces, shell slender fusiform........................ C. exornata View in CoL

4. Shell broadly fusiform, irregular crowded spirals................................................... C. sismondai Shell View in CoL narrower fusiform, regular fine spirals............................................... .. C. wagreichi View in CoL nov. sp.

5. Flattened cords obsolete mid-whorl on last whorl......................................... C. nanostriatula View in CoL nov. sp. Flattened cords separated by narrow punctate interspaces...................................................... 6

6. Last whorls shouldered....................................................................... C. suballigata View in CoL Base strongly constricted................................................................. C. cf. capelliniana Profile View in CoL slender fusiform..................................................................... C. planicostata View in CoL

References

Fedosov, A., Puillandre, N., Herrmann, M., Kantor, Yu., Oliverio, M., Dgebuadze, P., Modica, M. V. & Bouchet, P. (2018) The collapse of Mitra: molecular systematics and morphology of the Mitridae (Gastropoda: Neogastropoda). Zoological Journal of the Linnean Society, 183, 253 - 337. https: // doi. org / 10.1093 / zoolinnean / zlx 073

Herrmannsen, A. N. (1846) Indicis Generum Malacozoorum primordia. Fischer, Cassel, 1, pp. 155. [https: // www. biodiversitylibrary. org / page / 10695423]

Swainson, W. (1829 - 1833) Zoological Illustrations, or original figures and descriptions of new, rare, or interesting animals, selected chiefly from the classes of ornithology, entomology, and conchology, and arranged according to their apparent affinities. Series 2. Baldwin & Cradock, London, 136 pls. [pls. 1 - 30 (1829) + 31 - 45 (1830) + 46 - 85 (1831) + 86 - 96 (1832) + 97 - 136 (1833), http: // www. biodiversitylibrary. org / bibliography / 42278] https: // doi. org / 10.5962 / bhl. title. 42278

Swainson, W. (1840) A treatise on malacology or shells and shell-fish. Longman, London, viii + 419 pp. [http: // www. biodiversitylibrary. org / item / 33450]