Acritoscincus duperreyi (GRAY, 1839)
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Acritoscincus duperreyi
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| Higher Taxa | Scincidae, Eugongylinae (Eugongylini), Scincoidea, Sauria, Squamata (lizards) |
| Subspecies | |
| Common Names | E: Bold-striped Cool-skink, Three-lined Skink |
| Synonym | Tiliqua duperreyi GRAY 1839: 292 Lygosoma duperreyii — DUMÉRIL & BIBRON 1839: 715 (part.) Eulepis duperreyi — FITZINGER 1843 (fide SMITH 1937: 223) Leiolopisma duperreyi — GREER 1982 Leiolopisma trilineatum — GREER 1982 Leiolopisma trilineatum — COGGER 1983 Acritoscincus duperreyi — WELLS & WELLINGTON 1984 Acritoscincus duperreyi — WELLS & WELLINGTON 1985: 23 Acritoscincus buddeni WELLS & WELLINGTON 1985: 22 Bassiana duperreyi — HUTCHINSON et al. 1990 Pseudemoia duperreyi — FRANK & RAMUS 1995 Leiolopisma eulepis — FRANK & RAMUS 1995: 188 (nom. nud.) Bassiana duperreyi — COGGER 2000: 561 Bassiana duperreyi — FLATT et al. 2001 Bassiana duperreyi — DUBEY & SHINE 2010 Acritoscincus duperreyi — WILSON & SWAN 2010: 144 Acritoscincus duperreyi — COGGER 2014: 412 Bassiana duperreyi — DISSANAYAKE et al. 2021 Bassiana duperreyi — DISSANAYAKE et al. 2022 |
| Distribution | Australia (New South Wales, South Australia, Tasmania, Victoria) Type locality: Van Diemen's Land (= Tasmania); original description cites Kangaroo Is., S. A. |
| Reproduction | oviparous. Bassiana duperreyi has been studied because of its extraembryonic membrane development which seems to be significant for the evolution of placentation. There seems to be both temperature-dependent (TSD) and genetic sex determination (GSD) in this species (SHINE et al. 2002). Radder et al. (2009) show that sex in this species also depends on egg size. In fact, if (and only if) eggs are incubated at low temperatures, removing yolk from a newly laid egg turns the offspring into a male. Adding yolk from a larger (but not smaller) egg turns the recipient egg's offspring into a female. Remarkably, then, offspring sex in this species is the end result of an interaction between three mechanisms: sex chromosomes, nest temperatures, and yolk allocation. Dissanayake et al. (2021) show that nests have become deeper over 20 years, possibly in relation to climate change. Increasing elevation and decreasing nest temperature increases sex reversal in genotypical XX females to males. |
| Types | Lectotype: MNHN-RA 7102 (total length 131.5 mm), from Tasmania designated by Rawlinson (cited as “in prep.” by COGGER 1983). |
| Diagnosis | |
| Comment | Phylogenetics. Dissanayake et al. 2021, 2022 found five well-supported diagnosable operational taxonomic units (OTUs) within B. duperreyi. The genetic distances between the mitochondrial lineages of B. duperreyi varied from 2.3% (Tasmania cf southern Victoria) to 5.3% (western South Australia cf Tasmania). Synonymy: partly after SHEA & SADLIER 1999. Type species: Tiliqua duperreyi is the type species of the genus Acritoscincus Wells & Wellington 1985: 22. Acritoscincus is a nomen novum pro Eulepis Fitzinger 1843 which is pre-occupied by Eulepis Dalmann, MS. in Billberg, 1820 (Lepidoptera). This species is also the type species of the genus Bassiana HUTCHINSON et al. 1990. Probably listed in error by FRANK & RAMUS 1995. |
| Etymology | Named after Captain Louis-Isadore Duperrey (1786-1865), a French naval officer. |
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