Lacertidae

Lacertidae View in CoL View at ENA ( Fig. 1F–M View Figure 1 )

In lacertids, the nasal is subrectangular in shape, with a convex posterior margin. The anteromedial process is very long, whereas the anterolateral one is short or very short. The dorsal surface of the bone is almost completely covered by a well-developed dermal ornamentation ( Fig. 1H, J View Figure 1 ), at least in adults. The ornamentation is less marked in Acanthodactylus erythrurus (Schinz, 1833) ( Fig. 1F View Figure 1 ), Dalmatolacerta oxycephala (Schlegel, 1839) , Iberolacerta bonnali (Lantz, 1927) and I. horvathi (Méhely, 1904) , almost absent in Ophisops elegans Ménétries, 1832 ( Fig. 1L View Figure 1 ), and restricted to the posterior-half in Algyroides ( Fig. 1H View Figure 1 ) and Psammodromus hispanicus . In the largest specimens of Algyroides nigropunctatus Duméril & Bibron, 1839 (e.g. MDHC 243) the ornamentation can also reach the anterior margin on the lateral side of the bone. Barahona (1996) reported that the dermal cover can overstep the anterior margin of the bone in adults of Iberolacerta monticola (Boulenger, 1905) , Lacerta schreiberi Bedriaga, 1878 , Lacerta viridis (Laurenti, 1768) (= Lacerta bilineata Daudin, 1802 ), Podarcis muralis (Laurenti, 1768) and Timon lepidus (Daudin, 1802) , also hiding the anteromedial process in the largest species. This holds true also for other medium- or large-sized species, such as Lacerta trilineata Bedriaga, 1886 and Podarcis tiliguerta (Gmelin, 1789) . A sulcus separating the areas covered by prefrontal and internasal scales is visible in the middle of the surface, with the exception of Ac. erythrurus , Da. oxycephala , Dinarolacerta mosorensis (Kolombatovic, 1886) , I. bonnali [according to Barahona (1996), but UAM.R.Lm28A has it], I. cyreni (Müller & Hellmich, 1937) , I. horvathi , I. monticola cantabrica (Mertens, 1929) , Ophisops elegans , Podarcis bocagei (Lopez-Seoane, 1885) , Po. carbonelli and Po. hispanicus (Steindachner, 1870) .