Oedura lineata HOSKIN, 2019
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Oedura lineata
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| Higher Taxa | Diplodactylidae, Gekkota, Sauria, Squamata (lizards: geckos) |
| Subspecies | |
| Common Names | E: Arcadia velvet gecko |
| Synonym | Oedura lineata HOSKIN 2019: 263 |
| Distribution | Australia (inland E Queensland) Type locality: Expedition National Park, lonesome section (-25.479° S, 148.843° E; 400 m elevation) |
| Reproduction | |
| Types | Holotype: QM J91392; Paratypes: QM |
| Diagnosis | Diagnosis. Oedura lineata sp. nov. can be distinguished from all congeners by the following combination of traits: relatively small adult size (SVl mean 70.6, max 79.0 mm); relatively long and rounded original and regrown tail (original: Tl/SVl = 0.70–0.79, TW/Tl = 0.16–0.17, TD/TW = 0.79–0.81; regrown: Tl/SVl = 0.53–0.69, TW/Tl = 0.20–0.23, TD/TW = 0.75–0.83); relatively short limbs (Fll/SVl = 0.10–0.12; Hll/SVl = 0.13–0.14); rostral scale only partially divided by medial vertical groove; single cloacal spur on each side; high number of inter- orbital scales (21–23); < 19 pre-cloacal pores in males (mean 14, range 8–18), split medially by 2–6 scales without pores; high number of supralabial scales (11–13); dark iris; V- or Y-shaped broken bar or lines on the nape; dorsal colouration consisting of a complex pattern of linearly-arranged streaks, spots and dark markings on either side of a thin yellowish midline; mid-lateral series of small white spots; typically a broad dark band connecting back of eye to nape marking; original tail with white blotches along dorsal midline. Comparison with other species. See the Comparison for O. monilis, above, for comparison with congeners outside the tryoni group. Within the tryoni group, O. lineata sp. nov. is readily distinguished from O. castelnaui and O. argentea by having a V- or Y-shaped white nape marking enclosed in black (versus full nuchal band in those species) and dorsal pattern of linearly-arranged white streaks and/or spots (versus full transverse body bands in those species) (Fig. 2). Distinguished from O. coggeri by lack of white spots on forelimbs (versus obvious white spots), original tail pattern of paired blotches on dorsal midline (versus blotches arranged as irregular bands), narrower head (HW/SVl 0.17– 0.19 versus 0.19–0.22), regrown tail longer (Tl/SVl 0.53–0.69 versus 0.47–0.59) and rounder (TW/Tl 0.75–0.83 versus 0.64–0.76), and higher interorbital count (21–23 versus 15–18). Distinguished from O. tryoni by V- or Y- shaped white nape marking (versus many spots or few blotches), dorsal pattern of linearly-arranged streaks and/or spots on either side of a thin yellowish midline (versus evenly spotted or blotched), smaller size (SVl max 79.0 mm versus max 103.1 mm), typically, lower number of pre-cloacal pores in males (18 or less versus mean 19), and series of pre-cloacal pores in males generally separated by more scales medially (2–6 versus 0–3) (Tables 1, 2). Differs from O. monilis in typically having a V- or Y-shaped broken nape bar (versus, typically, unbroken nape bar), dorsal pattern of linearly-arranged streaks, spots and black markings on either side of thin, pale midline (versus transverse bars or connected large blotches on the dorsal midline), original tail pattern of paired blotches on dorsal midline (versus irregular bands), usually small white spots on base of hindlimbs (versus no spots on hindlimbs), smaller size (max 79.0 mm versus max 96.6 mm), higher interorbital count (21–23 versus 16–20), generally lower number of supralabials (11–13 versus 9–12), and series of pre-cloacal pores in males generally separated by more scales medially (2–6 versus 0–3) (Tables 1, 2). Differs from O. elegans sp. nov. in having a V- or Y-shaped broken nape bar (versus unbroken bar), dorsal pattern of linearly-arranged series of streaks, spots and black markings on either side of thin, pale midline (versus paired dumbbells along midline), lateral surfaces heavily marked with white spots and black markings (versus finely flecked), a dark band running from the back of the eye and usually to the nape marking (versus a thin black line running from below the back of the eye to below the nape marking), usually small white spots on base of hindlimbs (versus no spots on hindlimbs), smaller size (max 79.0 mm versus max 89.4 mm), relatively more rounded original tail (TD/TW 0.79–0.81 versus 0.63–0.74), higher interorbital count (21–23 versus 17–21), higher number of supra- labials (11–13 versus 9–11), and series of pre-cloacal pores in males generally separated by more scales medially (2–6 versus 1–3) (Tables 1, 2). Differs from O. picta sp. nov. in having a V- or Y-shaped broken bar (versus, typically, unbroken bar), dorsal pattern of linearly-arranged series of lines, spots and black markings on either side of thin, pale midline (versus ir- regularly dispersed large blotches), a dark band running from the back of the eye and usually to the nape marking (versus an obscure, thin black line running from below the back of the eye to usually below the nape marking), usu- ally small white spots on base of hindlimbs (versus, typically, no spots on hindlimbs), original tail pattern of paired blotches on dorsal midline (versus irregular bands), iris dark (versus gold), shorter head (Hl/SVl 0.21–0.24 versus 0.23–0.26), more rounded original tail (TD/TW 0.79–0.81 versus 0.66–0.74), higher interorbital count (21–23 ver- sus 16–20), higher number of supralabials (11–13 versus 9–11), and series of pre-cloacal pores in males generally separated by more scales medially (2–6 versus 1–2) (Tables 1, 2). |
| Comment | Ecology and habitat: Oedura lineata sp. nov. appears to be restricted to thick brigalow (Acacia harpophylla) forest (Figs. 16, 17 in Hoskin 2019). Surveys in mixed woodland and rock outcrops surrounding brigalow habitat in Expedition National Park failed to find the species. Individuals are found at night foraging on brigalow stems and branches, and fallen timber. The typical foraging position is head-down on a brigalow trunk within 1.5 m of the ground (e.g., Fig. 16). When disturbed, the geckos retreat into holes or cracks in the wood or behind bark. Other gecko species found in the bri- galow habitat with O. lineata sp. nov. were Strophurus taenicauda (De Vis), Gehyra catenata low, Gehyra dubia, Heteronotia binoei, and Diplodactylus vittatus. Oedura lineata sp. nov. is not known to co-occur with congeners. Oedura elegans sp. nov. has been found in woodland in the region (but not in the same brigalow habitat) and O. tryoni occurs in nearby rock outcrops. |
| Etymology | The species name lineata is derived from latin and refers to the linearly-arranged white lines, spots and dark markings that characterise this species. |
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