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Galeodinopsis biangulata
Taxonomy
Rissoa biangulata was named by Deshayes (1864).
It was recombined as Galeodinopsis biangulata by Garilli and Parrinello (2014).
It was recombined as Galeodinopsis biangulata by Garilli and Parrinello (2014).
Synonymy list
| Year | Name and author |
|---|---|
| 1864 | Rissoa biangulata Deshayes p. 407–408 figs. pl. 24: 29–30 |
| 2014 | Galeodinopsis biangulata Garilli and Parrinello pp. 388 - 391 figs. 9, 10 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Galeodinopsis biangulata Deshayes 1864
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. Garilli and D. Parrinello 2014 | Shell small, conical-ovate to conical-turrited, reaching 4.95 mm in height and 3.15 mm in width; Ht/W quite variable, also depending on occurrence and position of varices on last whorl, from 1.4 to 2 in shells over 3 mm in height, average value 1.62. Protoconch multispiral, conical with 2.2 to 2.3 rounded whorls and a rather immersed nucleus. Protoconch 1 of about 0.7 whorls with netted sculpture consisting of 6–7 very thin spiral lirae and numerous, irregular, short, very narrow axial segments occurring in interspaces between lirae. Protoconch 2 sculptured with microscopic dots roughly forming one adapical and two abapical discontinuous fine spiral threads, particularly next to protoconch/teleoconch boundary. Protoconch/teleoconch boundary well-marked by thin, sinuous lip. Teleoconch with up to 4.5 convex whorls. Whorls sculptured with axial and spiral elements forming more-or-less strong clathrate, almost bicarinate pattern and acute knobs at their intersections. Axial ribs slightly curved, opisthocline to almost straight, most more prominent than spirals; 13–16 (rarely 17–18) on the penultimate whorl; lacking on shell base. Main spiral sculpture of cords overriding axial ribs; 2 on early and penultimate whorls; 6–8 and 3–6 on last whorl and on shell base, respectively. A very weak to obsolete subsutural cord occurs next to suture in some specimens. Teleoconch microsculpture on spiral cords of fine, rather flat, closely spaced spiral threads, joined by very low, short axial elements in a few specimens. Last whorl well expanded, making up 0.6 to 0.75 of total shell height, some shells bearing one varix at angles of 65° to 340°. Aperture wide, ovate, very rounded anteriorly, with acute angle posteriorly, making up about 0.4–0.55 and about 0.6–0.75 of total shell and of last whorl height, respectively. Outer lip sinuous, weakly opisthocline, double-rimmed; internally smooth, with thin rim on its edge; externally with very marked varicose swelling. Inner lip curved, weakly expanded in columellar part, forming very narrow to obsolete umbilical chink. |
Measurements
No measurements are available
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| Source: f = family, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||