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Brookesia bekolosy RAXWORTHY & NUSSBAUM, 1995

IUCN Red List - Brookesia bekolosy - Endangered, EN

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Higher TaxaChamaeleonidae (Brookesiinae), Sauria, Iguania, Squamata (lizards)
Common Names 
SynonymBrookesia bekolosy RAXWORTHY & NUSSBAUM 1995: 540
Brookesia bekolosy — NECAS 1999: 276 
DistributionMadagascar (only known from the type locality)

Type locality: Bekolosy, Manongarivo Special Reserve, 1200 m elevation  
TypesHolotype: UMMZ 200078 
DiagnosisDiagnosis: A Brookesia with a straight dorsal ridge (keel) on the body; an incomplete series of six, dorsolateral pointed tubercles on the anterior region of the body; no pelvic shield; and no pointed tubercles on the chin. Only two other species, Brookesia superciliaris and B. therezieni have a straight dorsal ridge on the body. Brookesia superciliaris and therezieni have a complete series of 10-11 dorsolateral pointed tubercles on the body and pointed tubercles on the chin. (Raxworthy & Nussbaum 1995)

Description of holotype: Adult male in excellent state of preservation. The liver is missing (removed prior to preservation, and frozen in liquid nitrogen). Hemipenes everted. Testes are white and enlarged; left testis 2 mm long and 1•5 mm wide. Snout-vent length 34 mm; tail 28 mm; maximum head depth 5 mm, width 5 mm; axilla-groin distance 16mm; maximum body depth 9 mm, width 4 mm. Head with lateral and orbital crests, but no posterior crest; head dorsally with enlarged, rounded tubercles forming longitudinal parasagittal crests which start above the eyes and begin to converge before terminating at the posterior region of head; between parasagittal crests, a median line of rounded tubercles form a crest from snout to posterior region of head; lateral and orbital crest almost straight-edged when viewed laterally; orbital crest slightly denticulated; supraocular-cone pointed and does not project beyond nostril; no supranasal cone; elongated snout with horizontal distance between snout tip and anterior border of eye 1'5-times eye diameter; head longer than wide; two longitudinal lines of rounded tubercles start behind the eye and terminate at neck at an enlarged pointed tubercle on the neck; chin smooth. Body with dorsal ridge (keel) marked by two vertebral rows of slightly enlarged rounded tubercles; six dorsolateral pointed tubercles form an incomplete longitudinal line on body, starting at neck. the tubercles decreasing in size posteriorly until at midbody replaced by a continuous row of slightly enlarged rounded tubercles which continue to tail tip; dorso lateral pointed tubercles without enlarged tubercles at their base dorsally; an enlarged rounded tubercle above insertion point of hindlimbs. just below dorsolateral longitudinal row of tubercles: no pelvic shield; body laterally with regular longitudinal rows of slightly enlarged, rounded tubercles; venter with longitudinal rows of slightly enlarged rounded tubercles in sacral area; no pointed tubercles on limbs; no pointed tubercles around cloaça; no pointed tubercles on tail; rows of slightly enlarged rounded tubercles form longitudinal lines on ventral surface of tail. The hemipenis (Fig. 2) is clavate and symmetrical, bearing an apex that is cup-shaped with 3 shallow sunken centre. The thin and delicate symmetrical rim on the lateral and sulcal surface of the apex suggest to us that the central depression is not an artefact of incomplete hemipenis eversion. Within the central depression there is a small pair of smooth lobes. The apex rim is much lower on the sulcal side, with a small pair of round lobes on either side of the median line. The truncus and apex lack other lateral structures. (Raxworthy & Nussbaum 1995)

Coloration in life: head, body, limbs and tail brown with a darker brown spot at base of head anterior to dorsal ridge; tail tip orange. Ventrally head, body and tail pale brown with a faint dark brown median line from throat nearly to tail tip. (Raxworthy & Nussbaum 1995)

Coloration in preservative: After three months in formalin and three months in alcohol, the only change is a darkening of the pale brown pigments of the head, body and tail. (Raxworthy & Nussbaum 1995) 
CommentAbundance: only known from the type specimen (Meiri et al. 2017). 
EtymologyNamed after the type locality. 
  • Glaw, F. 2015. Taxonomic checklist of chameleons (Squamata: Chamaeleonidae). [type catalogue] Vertebrate Zoology 65 (2): 167–246 - get paper here
  • Meiri, Shai; Aaron M. Bauer, Allen Allison, Fernando Castro-Herrera, Laurent Chirio, Guarino Colli, Indraneil Das, Tiffany M. Doan, Frank Glaw, Lee L. Grismer, Marinus Hoogmoed, Fred Kraus, Matthew LeBreton, Danny Meirte, Zoltán T. Nagy, Cristiano d 2017. Extinct, obscure or imaginary: the lizard species with the smallest ranges. Diversity and Distributions - get paper here
  • Necas, P. & Schmidt, W. 2004. Stump-tailed Chameleons. Miniature Dragons of the Rainforest. Edition Chimaira, Frankfurt, 256 pp. [review in Elaphe 14 (1): 24]
  • Necas, Petr 1999. Chameleons - Nature's Hidden Jewels. Edition Chimaira, Frankfurt; 348 pp.; ISBN 3-930612-04-6 (Europe) ISBN 1-57524-137-4 (USA, Canada)
  • Raxworthy, C. J. & R. A. Nussbaum 1995. Systematics, speciation and biogeography of the dwarf chameleons (Brookesia; Reptilia, Squamata, Chamaeleontidae) of northern Madagascar. Journal of Zoology 235: 525-558. - get paper here
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