. Bulletin of the British Museum (Natural History). . Fig. 6. Variation in hemipenis structure. Diagrams represent transverse sections of single retracted lobes just apical to the hemipenial bifurcation, (i) Small-lipped type (most Lacerta spp.). (2) Large-lipped type {Podarcis, etc.). o = outer lip. i = inner lip. 4. Presence of plicae on the lobes In Algyroides, Psammodromus and nearly all species of Lacerta, the lobe surfaces have regular phcae running radially to their apicobasal axes, the only exceptions being L. fraasii and L. parva. These have the lobe surfaces irregularly folded with a
. Bulletin of the British Museum (Natural History). . Fig. 6. Variation in hemipenis structure. Diagrams represent transverse sections of single retracted lobes just apical to the hemipenial bifurcation, (i) Small-lipped type (most Lacerta spp.). (2) Large-lipped type {Podarcis, etc.). o = outer lip. i = inner lip. 4. Presence of plicae on the lobes In Algyroides, Psammodromus and nearly all species of Lacerta, the lobe surfaces have regular phcae running radially to their apicobasal axes, the only exceptions being L. fraasii and L. parva. These have the lobe surfaces irregularly folded with a series of longitudinal flaps on them. 5. Apical papillae (Fig. 5) The apical region of each lobe is usually irregularly pUcate, although in some members of Podarcis there may be a short series of small, blunt tubercles. The three species of Gallotia differ from the rest of Lacerta in having a terminal lobar area of large, pointed papillae, each of which is conical and somewhat flattened. Relatively large, pointed apical papillae also occur in Psammodromus blanci, P. hispanicus and P. microdactylus. 6. Micro-ornamentation of the lobe surface Klemmer (1957) pointed out that the minute projections on the lobe phcae differed in shape between various Lacerta species and were potentially useful as taxonomic characters. Klemmer based his studies on fresh material (which is inevitably in rather limited supply), but it is possible to examine the pattern of micro-ornamentation in hemipenes extracted from alcohol-preserved specimens, even those over a century old provided they were killed during the mating season, which means that this character can be fairly readily surveyed. Variation in the hemipenial micro-ornamentation of lacertids has recently been studied in some. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original
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