. Bonner zoologische Monographien. Zoology. 58 underlying blood sinus (Russell 1975). In these instances a separate branch of the sinus supplies each of the scansor rows (Delht 1934; Russell 1976). In many specimens of typically single-scansored geckos, proximal scansors may be somewhat irregular and divided. A unique, regular division of the scansors, however, is seen only in Rhacodac- tylus trachyrhynchus (Fig. 13g). The functional significance of these median divisions of the scansors is unknown. Terminal scansors are present in the East Tasman genera of the Carphodactyhni (Fig. 14). These
. Bonner zoologische Monographien. Zoology. 58 underlying blood sinus (Russell 1975). In these instances a separate branch of the sinus supplies each of the scansor rows (Delht 1934; Russell 1976). In many specimens of typically single-scansored geckos, proximal scansors may be somewhat irregular and divided. A unique, regular division of the scansors, however, is seen only in Rhacodac- tylus trachyrhynchus (Fig. 13g). The functional significance of these median divisions of the scansors is unknown. Terminal scansors are present in the East Tasman genera of the Carphodactyhni (Fig. 14). These structures do not resemble the apical plates of the Diplodactylini and are not considered strictly homologous to them. These are typically restricted to digit I of the manus and pes, and are absent in Rhacodactylus (Pseudothecadactylus), which has lost the claw on these digits (see below). Hoplodactylus rakiurae, however, lacks this terminal scansor and H. kahutarae possesses scansors around the claws of all digits. The terminal plates are variously developed in the constituent taxa with the narrow- padded Hoplodactylus and Naultinus bearing smaller plates than the new Caledonian genera. Eurydactylodes may be distinguished from all other genera by its autapomor- phic possession of two terminal plates, completely divided, on either side of the claw (Fig. 14a). All other species show either a single, medial scansorial plate or a single cleft plate, assymmetrical, with a large medial portion (character 75). The former condition is seen in all Rhacodactylus and in Bavayia sauvagii and B. ornata (Fig. 14b), the latter in B. cyclura, B. crassicollis, B. montana, B. septuiclavis, B. validiclavis and in the New Zealand species (Fig. 14c). The polarity of these character states could not be assessed and were entered into the analysis as missing for the ancestor. Character 76: Claws present on all digits (0), or digit I clawless (1). Character 77: Claws deep at base, moderately to strong
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