Falcatidae, Zangerl, 1990
|
publication ID |
https://doi.org/ 10.4202/app.00619.2019 |
|
persistent identifier |
https://treatment.plazi.org/id/DD016347-6071-FFCD-FFC4-5CDAFAD3E4DC |
|
treatment provided by |
Felipe |
|
scientific name |
Falcatidae |
| status |
|
Falcatidae indet. 1
Fig. 3B–H View Fig .
Material.— Eight teeth (MWGUW/Ps/1/221, MWGUW/ Ps/13/3–8, 19) from the Tournaisian, Czatkowice, sample A.
Description.— All the Denaea -like falcatid teeth from the TournaisianofCzatkowiceweredesignatedhereasFalcatidae indet. 1, but we are unsure whether all of them indeed represent the same species, because the diversity is quite high. There occur pentacuspid teeth, with a prominent median cusp which is vertical ( Fig. 3D–F View Fig ) or slightly inclined distally ( Fig. 3C View Fig ), but also seven-cuspid teeth with minute outer lateral cusplets ( Fig. 3B, G View Fig ). There is also one rather unusual, asymmetrical pentacuspid specimen, with outer lateral cusplets present, but devoid of intermediate ones ( Fig. 3H View Fig ). The cusps are covered (where observed) with subparallel cristae, stronger on the labial face. The bases are triangular, narrowing lingually, with an orolingual button ( Fig. 3F View Fig ) or at least a hump. The basolabial thickening can be in a form of a small tubercle ( Fig. 3B View Fig 2 View Fig ) to a wide shelf ( Fig. 3G View Fig ). The mesio-distal dimension of the bases ranges from 0.5 to 1 mm.
Remarks.— The poor preservation of most of the specimens precludes the definite identification and comparison of these teeth. None of them closely resembles typical specimens of Denaea cf. fournieri sensu Ginter et al. (2015) or other falcatids. Pentacuspid specimens of Falcatidae indet. 2 from Czerna (see below; Fig. 4D View Fig ) are somewhat similar to the tooth in Fig. 3F View Fig , with its prominent, lingually placed orolingual button. However, the seven-cuspid teeth of Falcatidae indet. 2 do not have outer lateral accessory cusplets, but two pairs of intermediate cusplets instead. Falcatidae indet. 1 is probably an older, Tournaisian falcatid taxon.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.