Pseudotetracha timberensis: a new species from the Northern Territory, Australia (Coleoptera: Carabidae, Cicindelinae, Megacephalini) and considerations on the taxonomy of Pseudotetracha Author Häckel, Martin Author Anichtchenko, Alexandr text Zootaxa 2015 4057 1 143 150 journal article 39302 10.11646/zootaxa.4057.1.10 a9c2ada1-02a9-4f30-b82b-211faa62748e 1175-5326 238911 BCC393E4-ACA9-40FD-99EA-774604D0EBC9 Key to species groups and subgroups of the genus Pseudotetracha Fleutiaux, 1894 (modified from Sumlin 1997 ) 1 Elytra unicolorous or with a testaceous apex only (subg. Pseudotetracha s. str. ).................................... 2 - Elytra with a testaceous margin extending from shoulder to apex (subg. Australicapitona Sumlin, 1992 )............... 11 2 Abdominal segments 3–6 with numerous small, clear setae; unicolorous or with a very thin apical testaceous area (“ black- burni” group)........................................................................ “ pulchra ” subgroup - Abdominal segments without very small, clear setae.......................................................... 3 3 Elytra unicolorous, without a testaceous apex.............................................................. 7 - Elytra with a testaceous apex (“ australis ” group)............................................................ 4 4 Testaceous apex large, nearly covering apical third of elytra; lateral carina of pronotum present to at least posterior half.................................................................................. P. australis (Chaudoir, 1865) - Testaceous apex not covering apical third of elytra........................................................... 5 5 Lateral carina of pronotum reaching nearly to the posterior dorsal sulcus; elytra moderately ovate and punctate in basal half................................................................................. P. whelani ( Sumlin, 1992 ) - Lateral carina of pronotum present on anterior fourth to anterior two thirds, not reaching nearly to the posterior dorsal sulcus.................................................................................................... 6 6 Elytral ground color purple, violet or bluish-purple, elytra nearly parallel-sided elytral length to width ratio> 1.5. Some speci- mens of P. kimberleyensis (Mjöberg, 1916) may have dark green elytra........................... “ spenceri ” subgroup - Elytral ground color green, blue, blue-green or cupreous, elytra more ovoid........................ “ helmsi ” subgroup 7 Antennomeres 1–4 and femora with at least terminal ends brown or black; elytra elongate oval with humeri rounded, punctate, with deep subsutural foveae in basal third................................................. “ marginicollis ” group - Antennomeres and femora unicolorous, yellow without darkish terminal ends; elytra not very ovate, more-or-less parallel- sided, with distinct humeri............................................................................. 8 8 Elytra rectangular, apices truncated, squared. Elytra purple or purplish blue. Lateral carina of pronotum extending to midlength................................................................................ P. greyana ( Sloane, 1906 ) - Elytra not rectangular.................................................................................. 9 9 Lateral carina of pronotum extending past midlength (“ blackburni ” group)...................................... 10 - Lateral carina absent or present only in anterior fourth......................................... “ cylindrica ” group 10 Elytra punctate to apex. Lateral carina of pronotum extending at least to posterior dorsal sulcus.................................................................................................... P. blackburni (Fleutiaux, 1895) - Elytra not punctate to apex. Lateral carina of pronotum reaching near posterior dorsal sulcus....... “ murchisona ” subgroup 11 Elytral margins microserrate at least near apex.............................................. “ australasiae ” group - Elytral margins smooth.................................................................. “ crucigera ” group