Cochlostoma (Turritus) affine (Benoit 1881)
- Dataset
- Cochlostoma Jan, 1830 revised: an overview of the subgenus Turritus Westerlund, 1883 and its species (Caenogastropoda, Cochlostomatidae)
- Rank
- SPECIES
Classification
- kingdom
- Animalia
- phylum
- Mollusca
- class
- Gastropoda
- order
- Architaenioglossa
- family
- Cochlostomatidae
- genus
- Cochlostoma
- species
- Cochlostoma affine
description
Description SHELL. Closely spaced riblets on last part of th protoconch. Teleoconch spotless. Very strong, widely spaced white ribs not fading toward aperture. Whorls more or less covered by whitish powder. Rather weak lip with slightly and gently inwardly bent columellar lobe partially covering umbilicus. MEASUREMENTS. 2 ♀♀: whorls = 8.1 – 8.1, H = 8.2 – 8.5 mm, H / W = 2.78 – 2.8, roundness = 0.15 – 0.15, ribs incl. = 57 – 59 °, apert. incl. = 17 – 19 °, ribs / mm 1 st wh. = 3 – 4, ribs / mm 4 th wh. = 5 – 5. FEMALE GENITAL ORGANS. As in C. (T.) nanum.
description
Figs 97 (red dot), 98 E, 99
discussion
Remarks Shells of this species are distinguishable from C. (T.) agriotes / crosseanum only by the stronger ribs. In the obtained phylogenetic trees, this taxon appears in a polytomy with the elegans / nanum cluster on one side and the crosseanum / agriotes on the other. The presence of this species in Sicily is highly important in a paleogeographic perspective (see discussion).
materials_examined
Types Not seen. Other specimens ITALY • 1 - Isnello (topotypical); 37.9289 ° N, 14.0131 ° E; 2010; Liberto leg.; EZ 1016. Type locality ITALY • “ Madonie ” (mountain range located on the north of Sicily).