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Ptychoceratodus cuyanus
Taxonomy
Ptychoceratodus cuyanus was named by Agnolin et al. (2017) [Medium-sized lungfish diagnosable on the following combination of characters (asterisk indicates possible autapomorphies): occlusal pits absent; upper tooth plates in wide contact along the mesiobuccal margin; upper tooth plates having five ridges; first ridge of upper tooth plates nearly straight (feebly *Corresponding author. curved); robust, and notably elongate, being slightly longer than the lingual margin*; and mesiointernal angle located at level of the third ridge*.]. Its type specimen is IANIGLA-PV 415,, a partial skull (right incomplete pterygopalatine bone bearing a complete tooth plate (Fig. 2). It is identified as an upper element because of the well-developed pterygopalatin), and it is a 3D body fossil. Its type locality is Agua de las Avispas, Cerro Cachueta, which is in a Carnian fluvial shale in the Potrerillos Formation of Argentina.
Synonymy list
| Year | Name and author |
|---|---|
| 2017 | Ptychoceratodus cuyanus Agnolin et al. |
| 2023 | Ptychoceratodus cuyanus Panzeri p. 167 |
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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.
†Ptychoceratodus cuyanus Agnolin et al. 2017
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Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| K. M. Panzeri 2023 | Placas dentarias de mediano tamaño (2,89 cm de borde medial y 1,99 cm de borde lingual). Placas pterigopalatinas con cinco denticulaciones de ápices redondeados. Bisectriz del ángulo interno localizada a nivel de la segunda hendidura en placas dentarias pterigopalatinas. Las hendiduras son profundas y decrecen en profundidad antero-caudalmente. Borde medial curvo y lingual levemente cóncavo en placas pterigopalatinas; las puntuaciones se distribuyen sin un patrón determinado; primer denticulación de las placas pterigopalatinas se dirige anterolabialmente, es de base angosta, mantiene este grosor hacia el extremo donde se adelgaza y curva levemente hacia la parte posterior, no posee faceta anterior; segunda y tercera denticulaciones de bases más anchas y largas que las posteriores; cuarta y quinta denticulaciones de similar longitud y anchura; quinta denticulación se curva levemente hacia la parte posterior; el proceso ascendente está presente a la altura de la segunda denticulación. Borde lingual de la placa dentaria pterigopalatina formando un ángulo obtuso con el plano sagital; hueso pterigopalatino sin prominencia medial y con sínfisis lineal y heterogenea |
Measurements
No measurements are available
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| Source: c = class, subp = subphylum | |||||
| References: Hendy et al. 2009, Carroll 1988 | |||||