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IUCN Red List - Trioceros nyirit - Least Concern, LC

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Higher TaxaChamaeleonidae, Sauria, Iguania, Squamata (lizards)
Common NamesE: Mt Mtelo Stump-nosed Chameleon, Pokot Chameleon 
Trioceros nyirit — SPAWLS et al. 2018: 301 
DistributionKenya (Cherangani Hills [elevation 2900-3150m], Mtelo massif [elevation 2276-3121m])

Type locality: Gatau Pass (2500m), Mtelo massif, northwest Kenya  
Reproductionviviparous (phylogenetic imputation, fide Zimin et al. 2022) 
TypesHolotype: NMK-L3166/1, adult male, collected by Jan Stipala and Joash Nyamache on 21st July 2006. Paratypes. 4 males and 4 females. NMK-L3166/2, male, NMK-L3166/ 3-4, females, southern slopes of Mtelo massif (2200-3100m); NMK-L2990/1 & 5, males, NMK-L2990/ 2-3, females, Gatau Pass, Mtelo massif (2200- 2500m). 
DiagnosisDiagnosis: A medium sized chameleon (largest male 191mm TL, largest female 180.5 mm TL) with heterogeneous body scalation; short, forward-pointing rostral process covered in enlarged scales; straight to weakly curved parietal crest, rising gradually posteriorly to meet the lateral crests to form a prominent, moderately steep triangular casque; This combination of characters differentiates T. nyirit sp. nov. from other species in the bitaeniatus-group. 
EtymologyNamed after the Pokot word for chameleon, nyirit. The distribution of T. nyirit sp. nov. occurs mainly within the Pokot tribal area. 
  • Glaw, F. 2015. Taxonomic checklist of chameleons (Squamata: Chamaeleonidae). [type catalogue] Vertebrate Zoology 65 (2): 167–246 - get paper here
  • Spawls, Steve; Kim Howell, Harald Hinkel, Michele Menegon 2018. Field Guide to East African Reptiles. Bloomsbury, 624 pp. - get paper here
  • Stipala, J. 2014. Mountain Dragons - In search of chameleon diversity in the highlands of Kenya. Jan Stipala, 124 pp., ISBN: 978-0-9928176-0-2 - get paper here
  • STIPALA, JAN; NICOLA LUTZMÁNN, PATRICK K. MALONZA, LUCA BORGH-ESIO, PAUL WILKINSON, BRENDAN GODLEY, MATTHEW R. EVANS 2011. A new species of chameleon (Sauria: Chamaeleonidae) from the highlands of northwest Kenya. Zootaxa 3002: 1–16 - get paper here
  • STIPALA, JAN; NICOLA LUTZMANN, PATRICK K. MALONZA, PAUL WILKINSON, BRENDAN GODLEY, JOASH NYAMACHE & MATTHEW R. EVANS 2012. A new species of chameleon (Squamata: Chamaeleonidae) from the Aberdare Mountains in the central highlands of Kenya. Zootaxa 3391: 1–22 - get paper here
  • Zimin, A., Zimin, S. V., Shine, R., Avila, L., Bauer, A., Böhm, M., Brown, R., Barki, G., de Oliveira Caetano, G. H., Castro Herrera, F., Chapple, D. G., Chirio, L., Colli, G. R., Doan, T. M., Glaw, F., Grismer, L. L., Itescu, Y., Kraus, F., LeBreton 2022. A global analysis of viviparity in squamates highlights its prevalence in cold climates. Global Ecology and Biogeography, 00, 1–16 - get paper here
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