Scincidae
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publication ID |
https://doi.org/10.1093/zoolinnean/zlz035 |
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persistent identifier |
https://treatment.plazi.org/id/9C298799-D262-5A1A-FF2D-FF3F2399A922 |
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treatment provided by |
Plazi |
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scientific name |
Scincidae |
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Scincidae View in CoL and Anguidae ( Fig. 20I–N View Figure 20 )
The squamosal of scincids and anguids is similar to that of gekkotans and lacertids in shape, but it is larger and its anterior process is long. In scincids ( Fig. 20I, J View Figure 20 ), the anterior end is pointed, whereas in anguids it is a flattened lamina ( Fig. 20K–N View Figure 20 ). Anguis gr. An. fragilis has a rounded and subhorizontal end ( Fig. 20K, L View Figure 20 ), whereas in Pseudopus apodus the end is pointed and more dorsally concave ( Fig. 20M, N View Figure 20 ).
QUADRATE
The main body of the paired quadrate ( Figs 21 View Figure 21 , 22 View Figure 22 ) is a posteriorly curved pillar structure. From this pillar, an osseous lamina develops laterally forming a large and deep conch, which usually is strongly posteriorly concave. The lateral margin of the conch is defined by the slightly expanded tympanic crest. Another similar but much smaller lamina can be present on the medial side of the pillar, developing in the anteromedial direction. The pillar bears the dorsally flattened cephalic condyle dorsally and the mandibular condyle ventrally. The mandibular condyle is composed of two portions, which are separated by a concavity. Laterally to the cephalic condyle, a foramen for the chorda tympani nerve can be visible in dorsal view. In many cases this portion of the lateral lamina is poorly ossified and presents a more or less developed squamosal notch. One or two quadrate foramina may pierce the lateral lamina, dorsally to the mandibular condyle. However, the quadrate foramen can sometimes be absent.
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