Tropidonophis parkeri MALNATE & UNDERWOOD, 1988

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Higher Taxa	Colubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes)
Subspecies
Common Names	E: Highland keelback
Synonym	Tropidonophis parkeri MALNATE & UNDERWOOD 1988: 161 Tropidonophis parkeri — WALLACH et al. 2014: 751 Tropidonophis parkeri — ROBERTS et al. 2024
Distribution	Papua New Guinea (Eastern Highlands Province, Waghi River) 1067-2134 m elevation. Type locality: Waghi River, Eastern Highlands Province, Papua New Guinea
Reproduction	oviparous
Types	Holotype: CAS 139588, male
Diagnosis	Diagnosis: Tropidonophis parkeri is distinguished from all New Guinea Tropidonophis, except elongatus, montanus and statisticus, by a high ventral count (mean >155). The species is differentiated from elongatus by having 2+2 temporals (2+3 in elongatus) and greater subcaudal pit development (mean ‹31% of the subcaudals in elongatus, >85% in parkeri). From both montanus and statisticus the species is distinguished by a longer tail (mean 28% of the total length in parkeri, 25% or less in montanus and statisticus); a greater number of subcaudals (means: parkeri 91.7 male, 88.6 female; montanus 83.6 male, 80.6 female; statisticus 80.0 male, 76.6 female); notably higher values for the sc/v+sc (means: parkeri 0.366 male, 0.360 female; montanus 0.338 male, 0.329 female; statisticus 0.328 male, 0.324 female); a longer length of two scale rows on the tail (mean length >10 sc on parkeri, <8 sc on montanus and statisticus). Tropidonophis parkeri is further distinguished from montanus by having nine infralabials (usually eight in montanus), and a low level of contact between the upper postocular and anterior temporals (10.7% vs 73.8% of the counts on montanus). The species is further distinguished from statisticus by having greater subcaudal pit development (mean >85% in parkeri, <36% in statisticus), and in having two anterior temporals (usually one on statisticus). Differences between parkeri and enigmaticus are noted under that species. (Malnate & Underwood 1988) Unfortunately we had to temporarily remove additional information as this was scraped by multiple AI companies who sell that data to their customers. These details, e.g. detailed descriptions or comparisons (about 8105 characters) are available for collaborators and contributors. Please contact us for details.
Comment	Distribution: see map in MALNATE & UNDERWOOD 1988: 163 (Fig. 29).
References	Beolens, Bo; Michael Watkins, and Michael Grayson 2011. The Eponym Dictionary of Reptiles. Johns Hopkins University Press, Baltimore, USA - get paper here Malnate E V; Underwood G 1988. Australasian natricine snakes of the genus Tropidonophis. PROCEEDINGS OF THE ACADEMY OF NATURAL SCIENCES OF PHILADELPHIA 140 (1) : 59-201 - get paper here O’Shea,M. 1996. A Guide to the Snakes of Papua New Guinea. Independent Publishing, Port Moresby, xii + 239 pp. - get paper here Roberts, J. R., Kraus, F., Allison, A., Richards, S. J., Iova, B., Tjaturadi, B., ... & Austin, C. C. 2024. Systematics and biogeo graphy of a Sunda-Papuan snake lineage (Natricidae: Tropidonophis Jan 1863). Zoological Journal of the Linnean Society, zlae039 - get paper here Wallach, Van; Kenneth L. Williams , Jeff Boundy 2014. Snakes of the World: A Catalogue of Living and Extinct Species. [type catalogue] Taylor and Francis, CRC Press, 1237 pp.
External links	IUCN Red List Google images

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