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Tribolonotus annectens ZWEIFEL, 1966

IUCN Red List - Tribolonotus annectens - Data Deficient, DD

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Higher TaxaScincidae, Egerniinae (Tiliquini), Scincoidea, Sauria, Squamata (lizards)
Common NamesE: Zweifel's Helmet Skink 
SynonymTribolonotus annectens ZWEIFEL 1966
Tribolonotus annectens — MYS 1988: 147
Tribolonotus annectens — ADLER, AUSTIN & DUDLEY 1995 
DistributionNew Britain, Bismarck Archipelago

Type locality: Mount Sinewit on Gazelle Peninsula (between 1000 and 1200 m), New Britain  
TypesHolotype: BPBM 1001 (Bernice P. Bishop Museum) 
DiagnosisDiagnosis: This new species is most closely related to the three species found in the Solomon Islands. Tribolonotus blanchardi is readily distinguished from T. annectens in having only one row of enlarged vertebral scales, whereas annectens has two. Tribolonotus schmidti resembles annectens in having two rows of enlarged dorsals, but in schmidti the rows commence on the nape directly posterior to the enlarged shields of the head, whereas in annectens the two juxtaposed rows of enlarged dorsal scales originate well back on the nape, just anterior to the insertions of the forelegs. Tribolonotus ponceleti and T. annectens are similar in the number and dis position of the enlarged vertebral scale rows but differ in other characters of scutellation. Ventral scales number 40 in T. annectens; 44 to 54 (mean 48.6) in 45 specimens of T. ponceleti. In both species there is a prominent row of enlarged scales paralleling the much larger vertebrals, but where at midbody in ponceleti there is one of these smaller scales for each verte bral, annectens has only one for every two vertebrals. There are two primary temporal scales in ponceleti and three in annectens. A sublabial scale in annectens lies between the first infralabial and the gulars and is wholly separated from the margin of the lip. The corresponding scale in ponceleti borders partly on the lip and is, therefore, the second infralabial (Zweifel 1966). 
  • Adler,G.H.; Austin,C.C. & Dudley,R. 1995. Dispersal and speciation of skinks among archipelagos in the tropical Pacific Ocean. Evolutionary Ecology 9: 529-541 - get paper here
  • Austin, Christopher C.; Eric N. Rittmeyer, Stephen J. Richards, George R. Zug 2010. Phylogeny, historical biogeography and body size evolution in Pacific Island Crocodile skinks Tribolonotus (Squamata; Scincidae). Molecular Phylogenetics and Evolution 57 (1): 227-236 - get paper here
  • Mys, Benoit 1988. The zoogeography of the scincid lizards from North Papua New Guinea (Reptilia: Scincidae). I. The distribution of the species. Bull. Inst. Roy. Sci. Nat. Belgique (Biologie) 58: 127-183
  • Zweifel, Richard G. 1966. A New Lizard of the Genus Tribolonotus (Scincidae) from New Britain. American Museum Novitates 2264: 1-12. - get paper here
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