Calumma guibei (HILLENIUS, 1959)
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|Higher Taxa||Chamaeleonidae, Sauria, Iguania, Squamata (lizards)|
|Synonym||Chamaeleo guibei HILLENIUS 1959: 25|
Calumma guibei — KLAVER & BÖHME 1986
Calumma guibei — GLAW & VENCES 1994: 248
Calumma guibei — NECAS 1999: 278
Calumma guibei — PRÖTZEL et al. 2017
|Distribution||Madagascar (Mt. Tsaratanana, 1590–2250 m elevation)|
Type locality: Mt. Tsaratanana (1800 m alt.), N.E. Madagascar
|Types||Holotype: MNHN-RA 1950.0354|
|Diagnosis||Diagnosis. Calumma guibei is a member of the phenetic C. nasutum group (PröTzel et al., 2016), because of the presence of a soft, dermal, unpaired rostral appendage, absence of gular or ventral crest and heterogeneous scalation at the lower arm, consisting mostly of enlarged tubercles with a diameter of 0.3 – 0.7 mm. Within the genus it is a small sized, beige to greenish chameleon (SVL 48.1–53.7 mm, TL 93.6–115.8 mm) that is characterized by a long rostral appendage in males (4.0 – 4.5 mm) and a short rostral appendage in females (1.7–2.0 mm), occipital lobes that are clearly notched in V-form and completely separated, absence of axillary pits, absence of a dorsal crest in both sexes, and a unique skull morphology including a large frontoparietal fenestra (with a width of 5.0 – 8.5% of SVL).|
Calumma guibei differs from C. fallax, C. gallus, C. nasutum, C. peyrierasi, C. vatosoa and C. vohibola of the C. nasutum group by the presence of occipital lobes; from C. boettgeri and C. linotum by the completely separated occipital lobes (vs. not or slightly notched, PröTzel et al., 2015), hemipenis with three pairs of rotulae (vs. two pairs) and strongly developed cornucula gemina (vs. smaller cornucula gemina, PröTzel et al., 2015), presence of a large frontoparietal fenestra with a width of 5.0 – 8.5% of SVL (vs. completely closed brain case), fused prefrontal fontanelle and naris in males (vs. separated); additionally from C. boettgeri by larger, juxtaposed tubercle scales on the extremities (diameter 0.5 – 0.9 mm vs. small, 0.2 – 0.5 mm, and isolated from each other). For the differentiation Calumma gehringi sp. nov., see Diagnosis of that species.
|Etymology||Named after Jean M. R. Guibé, French herpetologist (1910-1999).|
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