Gymnobela agassizi (A.E.Verrill & S.Smith, 1880)
publication ID |
https://doi.org/ 10.1080/00222933.2024.2383786 |
DOI |
https://doi.org/10.5281/zenodo.13772969 |
persistent identifier |
https://treatment.plazi.org/id/1945CB04-FFF4-FFCF-DF2A-FF694C6511D6 |
treatment provided by |
Plazi |
scientific name |
Gymnobela agassizi |
status |
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Gymnobela agassizi View in CoL (Verrill and Smith, 1880) (PSH G1)
( Figures 3 View Figure 3 A-B, 6A)
Pleurotoma (Pleurotomella) agassizi Verrill and Smith, 1880 – Verrill 1880: 394; Verrilll 1882: 454, pl. 57, Fig. 3–3a View Figure 3
Pleurotoma (Pleurotomella) brychia Watson, 1881 View in CoL – Watson 1881: 451; 1886: 335, pl. 19, fig. 4
Pleurotomella vitrea Verrill, 1885 View in CoL – Verrill 1885: 414, pl. 44, fig. 6
Pleurotomella agassizi var. permagna Dall, 1890 View in CoL – Dall 1890: 308
Material examined
Australia, New South Wales, Jervis CMR (− 35.333°S, 151.258°E), IN2017_ V03 _056, 2650– 2636 m, AMS C GoogleMaps .519355.
Distribution
North Atlantic and Jervis CMR off the coast of NSW.
Remarks
This species was previously known from its shell only and some minor details of the external anatomy of the animal ( Bouchet and Warén 1980, p. 50).
We provide below some further anatomical details. Animal white. Penis large, coiling clockwise, cylindrical to slightly tapering distally. Cephalic tentacles short, somewhat cylindrical, tip blunt; eyes minute. Venom apparatus: proboscis extremely long, coiled; venom gland convoluted, long; muscular bulb elongated, pearlescent. Radula of hypodermic teeth, relatively straight, tightly rolled; approximately 150 µm in length; barbs absent; adapical opening long; ventral side forming blade approximately 1/6 of length of tooth; base wide, angular, with lateral process; texture rugose; basal opening large, subcircular. Ligament long, rather broad.
Apart from its slightly more rounded whorl profile and its weaker ribs, the shell of this species is very similar to that of G. engonia and G. verecunda – from which, however, it can be easily distinguished by its dark orange-stained columella.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
Kingdom |
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Class |
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Genus |
Gymnobela agassizi
Criscione, Francesco & Hallan, Anders 2024 |
Pleurotomella vitrea
Verrill AE 1885: 414 |
Pleurotoma (Pleurotomella) brychia
Watson RB 1886: 335 |
Watson RB 1881: 451 |