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Trioceros serratus (MERTENS, 1922)

IUCN Red List - Trioceros serratus - Vulnerable, VU

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Higher TaxaChamaeleonidae, Sauria, Iguania, Squamata (lizards)
Subspecies 
Common Names 
SynonymChamaeleo serratus MERTENS 1922
Trioceros serratus — BAREJ et al. 2010 
DistributionCameroon

Type locality: “Südkamerun” (= South Cameroon); neotype locality: a palm tree near road border of the road from Anyajua to Belo, close to Belo, Mt. Oku, Cameroon. Coordinates: N 06°10’32’’ E 10°21’09’’ (Lat.: 6.17547°, Lon.: 10.35244), 1339 m (4394 feet) elevation.  
Reproductionoviparous 
TypesNeotype: MNHN-RA 2007.1494, adult male; the type specimen was probably destroyed during the Second World War (H. Wermuth 16.4.1979 in litt., in Klaver & Böhme 1992) 
DiagnosisDiagnosis: Trioceros serratus differs from all other Trioceros except T. wiedersheimi and T. perreti by a crest formed by the canthi rostrales merging above the snout, forming a depression between the tip of the snout and the merged crest. Moreover, it can be distinguished from T. q. eisentrauti by the absence of gular flaps (Fig. 2D), from T. montium, T. oweni, T. q. quadricornis, T. q. gracilior and T. pfefferi by the absence of rostral appendages in male specimens (Figs 2A, 2C, 2E–F, 2H) and from T. camerunensis and T. cristatus by the presence of a gular crest (Figs 2B, 2D). (Barej et al. 2010)


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CommentSynonymy: C. serratus has been synonymized with T. wiedersheimi by Mertens 1940 and subsequent authors but revalidated by BAREJ et al. 2010. 
EtymologyNamed after L.: serra, saw; -atus/a/um, adjectival suffix, denoting the serrate outline of the dorsal crest (Charles Klaver, pers. comm., 11 Jan 2023). 
References
  • Barej, Michael F.; Ivan Ineich, Václav Gvoždík,, Nathaly Lhermitte-Vallarino, Nono Legrand Gonwouo, Matthew LeBreton, Ursula Bott, & Andreas Schmitz 2010. Insights into chameleons of the genus Trioceros (Squamata: Chamaeleonidae) in Cameroon, with the resurrection of Chamaeleon serratus Mertens, 1922. Bonn Zool. Bull. 57 (2): 211–229 - get paper here
  • Glaw, F. 2015. Taxonomic checklist of chameleons (Squamata: Chamaeleonidae). [type catalogue] Vertebrate Zoology 65 (2): 167–246 - get paper here
  • Hughes, DF, Blackburn, DG. 2019. Evolutionary origins of viviparity in Chamaeleonidae. J Zool Syst Evol Res. 58 (1): 284-302 [2020] - get paper here
  • Mertens, R. 1922. Ein neues Chamäleon aus Kamerun. Zool. Anz. 54: 190-192. - get paper here
  • Mertens, R. 1940. Zur Herpetologie Kameruns und Deutsch-Ostafrikas. Zool. Anz. 131: 239-250
  • Trape, J.F.; Trape, S. & Chirio, L. 2012. Lézards, crocodiles et tortues d'Afrique occidentale et du Sahara. IRD Orstom, 503 pp. - get paper here
 
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