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. 2021 May 16;21:86. doi: 10.1186/s12862-021-01821-w

Fig. 21.

Fig. 21

Isolated ectopterygoid and scleral ring. Left ectopterygoid of A T. brevipes; B T. gracilis; C S. alberti; D A. occidentalis; in dorsal, ventral, and lateral views from left to right. Left scleral ring of E T. brevipes; F T. gracilis; G S. alberti; H A. occidentalis; in lateral (left) and medial (right) views. ect-pt, pterygoid facet of the ectopterygoid; ectdp, dorsal process of the ectopterygoid; ectmp, maxillary process of the ectopterygoid; ectvp, ventral process of the ectopterygoid; Scale bars = 1 mm