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Stolidotus marco

Bivalvia - Cyrtodontida - Stolidotidae

Taxonomy
Stolidotus marco was named by Kříž (2005). Its type specimen is MGM 3607ab S., a shell (internal mould of the left valve), and it is a 3D body fossil. Its type locality is ‘Stación de Belalcázar’ 7.5 KM southeast of Zarza-Capilla, which is in a Telychian coastal shale in Spain.

Synonymy list
YearName and author
2005Stolidotus marco Kříž pp. 461 – 462 figs. Plate 1, figures 24, 27–28

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
classBivalvia
Eubivalvia
subclassAutobranchia(Groblen 1894)
RankNameAuthor
infraclassPteriomorphia(Beurlen 1944)
OstreomorphiFerussac 1822
ArcioniGray 1854
orderCyrtodontidaScarlato and Starobogatov 1971
suborderPraecardiidina()
Antipleuroidei()
superfamilyDualinoideaConrath 1887
familyStolidotidae
genusStolidotusHede 1915
speciesmarco

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.

Diagnosis
ReferenceDiagnosis
J. Kříž 2005Stolidotus with small prosocline shells having prosogyrate umbones located towards the anterior end of shell. On the left (upper) valve well-preserved dorsoventrally elongated mesoconch (Wrigley 1946) with prominent growth bands and furrows. Outer surface sculpture of the left valve composed of numerous flat radial ribs and flat radial gutters broadening ventrally. Main radial ribs are subdivided into halves by the shallow radial gutter. On the inner surface sculpture the main radial ribs are not subdivided and the ribs are coarser along the ventral margin. On adult valves only one radial furrow or sinus developed starting near posterior ventral part of the mesoconch and widening ventrally. Right (lower) valve more convex than left valve, showing wing-like posterior structure. In both valves the outer and inner surface sculptures composed of flat radial ribs and gutters broadening ventrally. In outer surface sculpture of the right (lower) valve the main radial ribs and gutters are subdivided by 2–3 narrow radial gutters.