HAINOTINAE FASSIO, BOUCHET, SCHIAPARELLI & OLIVERIO, 2023

Fassio, Giulia, Stefani, Matteo, Russini, Valeria, Buge, Barbara, Bouchet, Philippe, Treneman, Nancy, Malaquias, Manuel António E., Schiaparelli, Stefano, Modica, Maria Vittoria & Oliverio, Marco, 2023, Neither slugs nor snails: a molecular reappraisal of the gastropod family Velutinidae, Zoological Journal of the Linnean Society 197 (4), pp. 924-964 : 949-950

publication ID

https://doi.org/ 10.1093/zoolinnean/zlac091

publication LSID

lsid:zoobank.org:pub:6DBA2650-DB10-4BDC-AEDB-2EF08D82815E

DOI

https://doi.org/10.5281/zenodo.7814332

persistent identifier

https://treatment.plazi.org/id/8C6587D7-FFAD-FFE9-1508-7403FDE55B58

treatment provided by

Plazi

scientific name

HAINOTINAE FASSIO, BOUCHET, SCHIAPARELLI & OLIVERIO
status

subfam. nov.

HAINOTINAE FASSIO, BOUCHET, SCHIAPARELLI & OLIVERIO SUBFAM. NOV.

( FIGS 2 View Figure 2 , 3 View Figure 3 , 4G View Figure 4 , 6B View Figure 6 )

Zoobank registration: urn: lsid: zoobank. org:act: A356DC93-B469-4DC0-B075-ED51CAEBDAA4

Type genus: Hainotis F. Riedel, 2000 View in CoL .

Included genera: Hainotis F. Riedel, 2000 , Mysticoncha J. K. Allan, 1936 .

Description: Body of small to medium size, 0.5– 5.0 cm total length. Shell thin to very thin, weakly calcified, ear shaped, high spire, with expanded aperture, smooth, with or without growth lines, completely enclosed by the mantle. Periostracum thin to moderately developed and hairy.

Protoconch of 1.7–2.1 whorls; protoconch I of 0.6 whorls, smooth or with weak growth striations, nucleus diameter 86 µm; protoconch–teleoconch boundary not always distinct.

Mantle dome shaped, outline rounded or polygonal (low ridges dividing the mantle into six areas, from a raised hexagonal area at the centre of the dorsum); thin to thick; with anterior elongated siphonal fold; colour highly variable, almost transparent to white, grey, beige, yellow, orange, red, violet, brown or black, frequently patterned with dots and/or polygonal shape lines.

Penis and vas deferens unknown.

Radula taenioglossate, formula 2:1:1:1:2; rachidian tooth elongated, with rectangular base; rachidian cusp with two external denticles on each side; lateral teeth elongated, with a pointed external cusp, with one denticle on the internal side and two on the external side; marginals narrow, with one small denticle on the internal side.

Jaws elongated, with masticatory denticles.

Distribution: North-eastern Pacific (from Oregon to northern Mexico), South Australia, New Zealand; 0–45 m deep.

Remarks: This subfamily is represented in the phylogenetic tree only by specimens of Hainotis sharonae described from the coast of California (type locality: Anaheim Bay, Orange County, CA, USA; Willett, 1939). This lineage is diagnosed by its shell with a higher spire, a radular formula of 2:1:1:1:2 with elongated central and lateral teeth, and an elongated anterior siphonal fold.

Pending further molecular analysis, we suggest also including the genus Mysticoncha in this subfamily because its radular formula and shape, shell shape, siphon shape and temperate distribution (South Australia, Victoria and New Zealand) are consistent with those of the type genus, Hainotis .

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