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The skull structure in vertebrates is closely related to feeding mode. This study examines the relationship between the cranial joint morphology variation among different lizard species [Eumesces schneideri (Daudin, 1802), Anguis colchica (Nordmann, 1840), and Eremias suphani (Başoğlu & Hellmich 1968)] and their feeding habit. This study investigates the cranial anatomical correlates of distinct cranial kinesis models. Different cranial joints permitting intracranial mobility have been observed among these species using histological section and whole-mount techniques. The cranial joints are similar among species that generally exhibit cranial kinesis. The stomach contents of the species were analyzed, and E. schneideri has the highest prey diversity among the examined species, followed by E. suphani and A. colchica in that order. The study indicated that the prey preferences differ among three lizard species. While no plant material was detected in the stomach contents of E. suphani and E. schneideri, it was detected in A. colchica. The diet of the three lizards consisted of various species of small arthropods such as Arachnida, Lepidoptera, Coleoptera, Formicidae, and Gastropoda. Additionally, no significant differences were detected in SVL, head, and jaw size measurements between adult males and females of each species. [ABSTRACT FROM AUTHOR]

Although embryological studies of squamates have a long history, most groups in this large clade remain poorly studied. One such group is the family Scincidae, which consists of morphologically and ecologically diverse lizards. In this study, we describe several stages of embryonic development based on cleared and stained specimens of Heremites auratus and Heremites vittatus. Our analysis indicates that the pterygoid and frontal are the first bones to be ossified at stage 34 in the skull of H. auratus. At stage 37, which was examined in both studied species, the ossified bones include the nasal, maxilla, parietal, prefrontal, premaxilla, postorbital, postfrontal, jugal, squamosal, quadrate, vomer, palatine and all mandible bones. In both species, the skull roof is relatively poorly ossified at stage 37. However, in H. auratus, the frontal and parietal bones ossify at their lateral edges at stage 37, while in H. vittatus, the frontal bones begin to ossify towards the midline. This suggests that ossification occurs later in H. auratus compared to H. vittatus, indicating a heterochronic pattern in ossification between these species. Additionally, pigmentation on the dorsal side of the body and scaling, which covered the entire body by stage 37 in H. vittatus, occur earlier compared to H. auratus. Compared to other scincid species, ossification in these lizards begins at a later stage but is completed earlier. [ABSTRACT FROM AUTHOR]