Gymnobela agassizi (A.E.Verrill & S.Smith, 1880)

Criscione, Francesco & Hallan, Anders, 2024, Integrative taxonomy of Gymnobela and Pontiothauma (Conoidea: Raphitomidae) from Australian waters provides more evidence of transoceanic distribution in deep-sea gastropods, Journal of Natural History 58 (37 - 40), pp. 1429-1459 : 1449

publication ID

https://doi.org/ 10.1080/00222933.2024.2383786

publication LSID

lsid:zoobank.org:pub:6C859E86-240D-4DB2-BD64-1F22AD48AF0C

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

 

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.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Neogastropoda

SuperFamily

Conoidea

Family

Raphitomidae

Genus

Gymnobela

Loc

Gymnobela agassizi

Criscione, Francesco & Hallan, Anders 2024
2024
Loc

Pleurotomella vitrea

Verrill AE 1885: 414
1885
Loc

Pleurotoma (Pleurotomella) brychia

Watson RB 1886: 335
Watson RB 1881: 451
1881
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