Cassisodus cf. margaritae Ginter and Sun, 2007
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publication ID |
https://doi.org/ 10.4202/app.00619.2019 |
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persistent identifier |
https://treatment.plazi.org/id/DD016347-6073-FFC0-FC8E-5C25FE97E051 |
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treatment provided by |
Felipe |
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scientific name |
Cassisodus cf. margaritae Ginter and Sun, 2007 |
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Cassisodus cf. margaritae Ginter and Sun, 2007
Fig. 5E, F View Fig .
Material.— Three teeth (ZPAL P. IV/232, 309, 334) from the upper Viséan, Czerna, sample Cz-1.
Description.— The teeth are composed of a low, crushing crown and a typical euselachian base sensu Ginter et al. (2010). The crown is asymmetrical and consists of a main, pyramidal cusp, not in the median position. On the shorter side of the crown there are two lateral cusps and on the longer one there are three cusps in smaller specimens ( Fig. 5E View Fig ), but in the larger specimen the respective numbers are three and four ( Fig. 5F View Fig ). The bases of the cusps are fused. There are tubercles on both labial and lingual sides of the cusps. In the larger tooth (4 mm mesio-distally) the main part of the crown is strongly elevated, but in the smaller teeth (about 2 mm wide) the size difference between the main and the lateral cusps is almost negligible.
Remarks.— The type material of Cassisodus margaritae Ginter and Sun, 2007 , was described from the middle Tournaisian of Muhua, southern China. Although the tooth designated as the holotype is compact and symmetrical ( Ginter and Sun 2007: fig. 5A), the other teeth ( Ginter and Sun 2007: fig. 5B–D) are very similar to those from Czerna. They are elongated mesio-distally, with smooth, fused cusps and characteristic tubercles on the lingual and labial faces. It was proposed ( Ginter and Sun 2007: 714) that the holotype was an anterior tooth whereas the rest represent the lateral tooth families. The latter most probably also concerns the teeth from Czerna.
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