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Catantostoma clathratum
Discussion
Sandberger 1842 Plate 8 Figures 7a-d; one of the five syntypes on a plaque in the Naturwissenschaftliche Sammlung in the Nassauisches Landesmuseum at Wiesbaden
Taxonomy
Catantostoma clathratum was named by Sandberger (1842) [Catantostoma clathratum Sandberger 1842]. Its type specimen is Sandberger 1842 Plate 8 Figures 7a-d; one of the five syntypes on a plaque in the Naturwissenschaftliche Sammlung in the Nassauisches Landesmuseum at Wiesbaden, a shell, and it is a 3D body fossil. Its type locality is Villmar, near Limburg (Lahn), which is in a Givetian marine limestone/reef rocks in the Cürten Formation of Germany. It is the type species of Catantostoma.
Synonymy list
| Year | Name and author |
|---|---|
| 1842 | Catantostoma clathratum Sandberger |
| 1844 | Catantostoma clathratum Goldfuss p. 78 figs. pl. 188 f. 2a-c |
| 1855 | Catantostoma clathratum Sandberger and Sandberger p. 206 figs. pl. 24 f. 20, 20a-c |
| 1922 | Catantostoma clathratum Paeckelmann p. 35 |
| 1941 | Catantostoma clathratum Knight pp. 68 - 69 figs. pl. 38 f. 3a-d |
| 1994 | Catantostoma clathratum Kaufhold p. 60 figs. pl. 11 f. 5-7 |
| 2001 | Catantostoma clathratum Heidelberger pp. 74 - 75 figs. pl. 5 f. 10-11 |
| 2023 | Catantostoma clathratum Wagner p. 3184 |
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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.
†Catantostoma clathratum Sandberger 1842
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. B. Knight 1941 | Small, trochiform gastropods with a selenizone bearing a trema, and with a twisted final whorl and restricted aperture at gerontic stages; whorl profile well arched between sutures; sutures moderately deep; nucleus not well known but seemingly normal and dextral; base anomphalous, rounded; columellar lip at younger stages unknown, at gerontic stages taking part in the deformation of the aperture the lower part being bent sharply on itself in such a way as to leave a round, collared opening passing through the shell in an antero-dorsal position; parietal inductura wanting at gerontic stages; outer lip at earlier stages with a shallow sinus culminating at about the middle of the final whorl (just above the lower suture in earlier whorls) in what appears to be a shallow notch which gives rise to a selenizone, the margin of the lip passing from the upper suture to the selenizone with rather strong backward obliquity and moderate forward convexity, below the selenizone passing downward at first with a slight forward obliquity for a very short distance then a gentle backward obliquity with slight forward concavity, at gerontic stages the lip turns in on itself greatly restricting the width of the aperture, and an opening, or trema, appears on the selenizone about one-third the whorl circumference from the rounded margin o f the aperture; the selenizone bordered by strong lirae and with moderately strong lunulae; ornamentation rather strong, widely spaced revolving and transverse lirae forming a network; shell structure unknown. Specimens are commonly about the same size with a height of about 11 mm. and a width of about 8 mm., with a pleural angle of about 80 degrees. |