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Galeodinopsis semperi

Gastropoda - Rissoidae

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).

Synonyms
  • Rissoa duboisii was named by Nyst (1845) [Rissoa Duboisii]. It is a 3D body fossil. Its type locality is Kleine-Spauwen, which is in a Rupelian carbonate claystone in the Bilzen Formation of Belgium.

    It was recombined as Alvania duboisi by Glibert and Heinzelin (1954); it was replaced with Galeodinopsis semperi by Garilli and Parrinello (2014).
  • Rissoa multicostata was named by Speyer (1864).

    It was recombined as Alvania (Arsenia) multicostata by Tembrock (1964); it was recombined as Alvania (Alvania) multicostata by Muller (2008); it was replaced with Galeodinopsis semperi by Garilli and Parrinello (2014).
Synonymy list
YearName and author
1845Rissoa duboisii Nyst p. 418 figs. n° 358, pl. 37: 19
1864Rissoa multicostata Speyer p. 290 figs. pl. 41: 3–5
1871Alvania semperi Wiechmann p. 58–60
1954Alvania duboisi Glibert and Heinzelin p. 351 figs. pl. 5: 13
1964Alvania (Arsenia) multicostata Tembrock figs. pl. 7: 6, 7
2008Alvania (Alvania) multicostata Muller figs. pl. 4: 10a, b
2014Galeodinopsis semperi Garilli and Parrinello pp. 393 - 396 figs. 12, 13

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Protostomia
—Spiralia
superphylumLophotrochozoa
phylumMollusca
classGastropoda
RankNameAuthor
subclassCaenogastropoda(Cox 1959)
—Sorbeoconcha(Ponder and Lindberg 1997)
—Hypsogastropoda(Ponder and Lindberg 1997)
superfamilyRissooideaGray 1847
familyRissoidaeGray 1847
subfamilyRissoinaeGray 1847
genusGaleodinopsisSacco 1895
speciessemperi(Wiechmann 1871)

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
ReferenceDiagnosis
V. Garilli and D. Parrinello 2014Shell 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.
Measurements
No measurements are available
Composition: aragonitec
Locomotion: actively mobilef
Life habit: epifaunalf
Diet: grazerf
Vision: limitedc
Created: 2009-09-10 07:55:20
Modified: 2009-09-10 09:55:20
Source: f = family, c = class
References: Hendy et al. 2009, Kiessling 2004

Age range: base of the Early/Lower Oligocene to the top of the Chattian or 33.90000 to 23.03000 Ma

Collections (16 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Oligocene33.9 - 28.4France (Essonne) Alvania duboisi (9072 9073 9075 9076 9077 9078 9079 9098 9114 9135 9169 9180 9181)
Rupelian33.9 - 28.1Belgium Rissoa duboisii (178068)
Chattian28.1 - 23.03Denmark Alvania semperi (234515)
Chattian28.1 - 23.03Denmark (Jylland) Alvania semperi (9170)