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Galeodinopsis semperi
Taxonomy
Alvania semperi was named by Wiechmann (1871) [Alvania Semperi nov. sp.; Schwartz v. Mohrenstern (in litt.) Wiechmann 1871: 58–60.].
It was recombined as Galeodinopsis semperi by Garilli and Parrinello (2014).
It was recombined as Galeodinopsis semperi by Garilli and Parrinello (2014).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1845 | Rissoa duboisii Nyst p. 418 figs. n° 358, pl. 37: 19 |
| 1864 | Rissoa multicostata Speyer p. 290 figs. pl. 41: 3–5 |
| 1871 | Alvania semperi Wiechmann p. 58–60 |
| 1954 | Alvania duboisi Glibert and Heinzelin p. 351 figs. pl. 5: 13 |
| 1964 | Alvania (Arsenia) multicostata Tembrock figs. pl. 7: 6, 7 |
| 2008 | Alvania (Alvania) multicostata Muller figs. pl. 4: 10a, b |
| 2014 | Galeodinopsis semperi Garilli and Parrinello pp. 393 - 396 figs. 12, 13 |
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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 semperi Wiechmann 1871
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Invalid names: Galeodinopsis duboisi Nyst 1845 [replaced], Galeodinopsis multicostata Speyer 1864 [replaced]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| V. Garilli and D. Parrinello 2014 | Shell small, conical-turrited, reaching about 4.1 mm in height and 2.6 mm in width (about 2.55 1.6 in type specimen of Rissoa duboisii); Ht/W variable, mainly depending on occurrence and position of varices on last whorl, from 1.4 to about 1.7. Protoconch multispiral, conical, with 2.3 to 2.7 rounded whorls and rather immersed nucleus. Protoconch 1 of about 0.7 whorls with netted sculpture consisting of at least 6 very thin spiral lirae and numerous, irregular, short, very narrow axial segments occurring in interspaces between lirae. Intersection of spiral and axial forming rough hexagons or squares. Protoconch 2 sculptured with very few microscopic dots roughly forming one or two discontinuous fine spiral threads in suprasutural position. Protoconch/teleoconch boundary marked by weakly sinuous, very thin lip. Teleoconch with up to at least 3.5 convex whorls. Whorls sculptured with equal axial and spiral elements forming clathrate pattern of acute nodules at their intersections. Axial ribs slightly curved, opisthocline to almost straight; 18–24 on penultimate whorl; lacking on shell base. Main spiral sculpture of cords overriding axial ribs. Cords 3–4 on early teleoconch and on penultimate whorl; 7–10 and 3–7 (depending on shell height) on last whorl and shell base, respectively. A further, much weaker, almost flat subsutural cord occurs on some specimens. Teleoconch microsculpture on spiral cords of fine, raised, closely spaced spiral threads simulating a sort of pseudopitted pattern on a few specimens. Threads more raised on subsutural cord, where they do not show any trace of pitted microsculpture. Last whorl well expanded to strongly inflated, making up about 0.7 total shell height; some shells with one varix at angles of 90° to about 200°. Aperture wide, ovate, very rounded anteriorly, with acute angle posteriorly, making up about 0.5 and about 0.6–0.7 of total shell and of last whorl height, respectively. Outer lip weakly sinuous to almost straight, double-rimmed due to a thin rim on its edge; internally smooth; externally with very marked varicose swelling covered by spiral cords. Inner lip weakly curved, with very thin expansion in columellar area, forming very narrow to obsolete umbilical chink. |