Calumma nasutum (DUMÉRIL & BIBRON, 1836)
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Calumma nasutum
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| Higher Taxa | Chamaeleonidae, Sauria, Iguania, Squamata (lizards) |
| Subspecies | |
| Common Names | |
| Synonym | Camaeleon nasutus DUMÉRIL & BIBRON 1836: 216 Crassonota nasuta — GRAY 1865: 353 Chamaeleo radamanus MERTENS 1933 Chamaeleo nasutus — MERTENS 1966 Calumma nasuta — KLAVER & BÖHME 1986 Calumma nasuta — GLAW & VENCES 1994: 248 Calumma nasuta — NECAS 1999: 245 Calumma nasutum — LUTZMANN & LUTZMANN 2004 Calumma sp aff. nasutum —GEHRING et al. 2010 |
| Distribution | E Madagascar (between Anosibe An’ala (19.3244°S, 48.2199°E) and Andasibe in the central east to Sorata), elevation 880 – 1400 m Type locality: Madagascar |
| Reproduction | oviparous |
| Types | Lectotype: MNHN-RA 1994.0610 (was MNHN-RA 6643C), male, female, paralectotypes: MNHN-RA 1994.0608 (was MNHN-RA 6643A) female, MNHN-RA 1994.0609 (was MNHN-RA 6643B), male; MNHN-RA 0.6643 originally comprised nine specimens among which only four specimens were syntypes: MNHN-RA 6643, MNHN-RA 6643A, MNHN-RA 6643B and MNHN-RA 6643C Holotype: SMF 22132 [radamanus] |
| Diagnosis | Diagnosis (based on the type series, the three males MNHN 6643C, MNHN 6643B, and ZSM 924/2003, and two females MNHN 6643 and ZSM 1699/2012): Calumma nasutum is characterised by (1) a medium size (male SVL 43.7–49.0 mm, female SVL 43.0 – 49.4 mm; male TL 89.0 – 100.8 mm, female 80.7 – 95.1 mm), (2) a medium sized (2.2 – 2.6 mm in males, 1.2 – 1.5 mm in females) and distally rounded rostral appendage, (3) rostral scale not integrated into the rostral appendage, (4–7) rostral, lateral, temporal (consisting of one tubercle), and cranial crests present, (8) parietal crest indistinct or present, (9) a distinctly raised casque in males with a height of 1.5 – 2.0 mm, (10) dorsal crest can be present in males, (11) 12–15 supralabial scales, (12) axillary pits generally present, (13) diameter of the largest scale in the temporal region of the head 0.8 – 1.6 mm, (14) no frontoparietal fenestra, (15) parietal and squamosal in contact, (16) parietal bone width at midpoint 9.8 – 17.9% of skull length; colour in life based on clade K: (17) a generally green to brown body colouration, (18) a typically olive green to brown nose in non-stressed colouration, (19) a green cheek colouration, (20) three to four diffuse dorsoventral blotches of variable colour on the body and a light lateral stripe, and (21) a brown stripe crossing the eye can occur. Calumma nasutum can easily be distinguished from C. vatosoa by presence of a rostral appendage (vs absence); from C. vohibola by the rostral appendage length (1.2–2.6 mm vs 0.0–0.8 mm) and a high casque (0.7– 2.0 mm vs 0.6 mm – re-measured, differing from GehrinG et al., 2011); for diagnosis against C. fallax, see below. For diagnosis against the species described and revalidated herein, see their respective (re-)descriptions below (Prötzel et al. 2020: 39). |
| Comment | Photo in Elaphe 18 (4): 22 [2010]. Key: see Prötzel et al. 2020 for a key to the members of the C. nasutum group. |
| Etymology | Named after the Latin adjective nasutum meaning ‘big-nosed,’ in the neuter nominative singular; obviously in reference to the characteristic rostral appendage. |
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