Kayentachelys bajazidi, NOPCSA, 1923
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publication ID |
https://doi.org/10.1093/zoolinnean/zlx037 |
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persistent identifier |
https://treatment.plazi.org/id/C0758785-FFA1-FFCB-DEF8-B55A4429F97F |
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treatment provided by |
Plazi |
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scientific name |
Kayentachelys bajazidi |
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KALLOKIBOTION BAJAZIDI NOPCSA, 1923 A
( FIGS 2–5 View Figure 2 View Figure 3 View Figure 4 View Figure 5 )
Kallokibotium bajazidi Nopcsa, 1923b
Kallokibotium manificum Nopcsa, 1923b
New material: A selection composed of the most informative specimens belonging to the UBB collection. UBB ToK-2, a relatively complete skeleton, in which are preserved the skull ( UBB ToK-2/1; Fig. 2A–F View Figure 2 ) and the lower jaws ( UBB ToK-2/2 and UBB ToK-2/3; Fig. 2G–L View Figure 2 ); most elements of the carapace ( UBB ToK-2/5 and UBB ToK- 2/6; Fig. 3A, B View Figure 3 ); the almost complete plastron ( UBB ToK- 2/4; Fig. 3C, D View Figure 3 ); several cervical and dorsal vertebrae ( UBB ToK-2/8, UBB ToK-2/7, UBB ToK-2/9; Fig. 4A–P View Figure 4 ); the left humerus ( UBB ToK-2/13; Fig. 4Q–V View Figure 4 ); the left scapula ( UBB ToK-2/5 + UBB ToK-2/7; Fig. 4W View Figure 4 ); an ungual phalanx (ToK-2/17; Fig. 4X View Figure 4 –AA); the right ulna (ToK-2/18; Fig. 4A B View Figure 4 – AF); the right radius (ToK-2/19; Fig. 4A G View Figure 4 –AK); the proximal region of the left tibia (ToK-2/20; Fig. 4A L View Figure 4 –AO); and other elements of the axial and appendicular skeletons including, among others, the almost complete right scapular girdle and the left femur, preserved in contact with the ventral region of the plastron ( Fig. 3D View Figure 3 ). UBB ToK-1, a partial skeleton including the skull roof ( UBB ToK-1/14; Fig. 2M–N View Figure 2 ); the right humerus ( UBB ToK-1/5; Fig. 4A P View Figure 4 – AS); the right scapula ( UBB ToK-1/3; Fig. 4A T View Figure 4 –AU); the left humerus ( UBB ToK-1/6; Fig. 4A V View Figure 4 – AY); the left scapula ( UBB ToK-1/4; Fig. 4A Z View Figure 4 –BA); and other elements of both the cranial skeleton and the shell. UBB NVK-7, a partial anterior region of a carapace of a juvenile specimen ( Fig. 5A, B View Figure 5 ). UBB NVK-31, and almost complete shell, lacking the most posterior regions of both the carapace and the plastron ( Fig. 5C–H View Figure 5 ).
Locality and horizon: The new specimens presented here come from two outcrops, ToteȘti (the specimens whose collection number includes ToK) and Nălaţ- Vad (the specimens whose collection number includes NVK), geographically located very close to Sânpetru, the locality where the classic material of Kallokibotium was found ( Fig. 1 View Figure 1 ). All these sites are located in the Haţeg Basin, a basin bounded by the Poiana Ruscă, Retezat, Țarcu and Șureanu mountains, in Râul Mare, Hunedoara County, Transylvania, Romania. The Sânpetru Formation is a Maastrichtian continental formation, of fluvial origin, exposed in the southern sector of the Haţeg Basin ( Codrea et al., 2002; Smith et al., 2002; Therrien et al., 2002; Van Itterbeeck et al., 2004; Therrien, 2005; Van Itterbeeck, Markevich & Codrea, 2005).
Emended diagnosis: A Testudinata belonging to the stem group of Testudines, with the following autapomorphies: nuchal plate composed of two elements, the most anterior being smaller and rectangular, and the other hexagonal and wider than long. It differs from the other stem Testudines by the following character combination: skull as wide as long; internarial process present, mainly formed by the premaxillae; interorbital space very wide, wider than the length of each orbit; orbits as high as long, laterally located; prefrontals in contact with the apertura narium externae; parietalsquamosal contact; absence of quadratojugal-squamosal contact; absence of supraoccipital exposure on the skull roof; processus trochlearis oticum present; in the ventral skull margin, larger exposure of the quadratojugal than that of the jugal; small cheek emargination, as high as long; very narrow triturating surfaces; presence of labial, lingual and accessory ridges on the maxillary; pterygoid-basioccipital contact present; foramen caroticum basisphenoidale entirely formed by the basisphenoid; canalis caroticus lateralis ventrally open at a foramen formed by the basisphenoid and pterygoids; well-developed cranial scutes, three pairs and a posterior odd scute being located on the sagittal plane; dentary reaching the articular, preventing the surangular-angular contact; high coronoid process; absence of retroarticular process; outer surface of the shell with an ornament pattern composed of tiny and low vermiculations and tubercles; absence of shell fontanelles; absence of a nuchal notch; eight neurals, the first one hexagonal with short latero-posterior margins, the second rectangular, and the others hexagonal with short latero-anterior margins or with subequal latero-anterior and latero-posterior margins; eight pairs of costals; 2 suprapygals; 11 pairs of peripherals; no cervical scute; sulcus between the third and fourth vertebrals on the fifth neural; no supramarginals; 12 pairs of marginals; marginals not reaching the costal series; osseous carapace-plastron connection; absence of cleithrum; axillary buttresses contacting the peripheral series and the first costal; inguinal buttresses contacting the eighth peripherals and the costal series; short and rounded anterior plastral lobe; a single pair of mesoplastra; posterior plastral lobe longer than the anterior, with substraight lateral margins; distinct anal notch; a pair of intergulars, overlapping the anterior region of the entoplastron; complete inframarginal series, composed by four scutes; amphicoelous cervical and caudal vertebrae; narrow cervical vertebrae; centrum of the seventh cervical longer than that of the eighth; high cervical postzygapophyses; low cervical ventral keel; first thoracic vertebra facing anteriorly directed; caudal vertebrae with tightly fitting zygapophyses concave anteriorly; triradiate pectoral girdle; well-developed and rod-shaped scapular and acromial processes, with a reduced lamina between them.
NEW INFORMATION ON THE ANATOMY OF KALLOKIBOTION
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University of Newcastle |
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.
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Genus |
Kayentachelys bajazidi
| Pérez-García, Adán & Codrea, Vlad 2018 |
Kallokibotium bajazidi
| Nopcsa 1923 |
Kallokibotium manificum
| Nopcsa 1923 |