Mecynotarsus bidens Kejval & Cz 2013, sp. nov.
Creators: name: Kejval, Zbyněk
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Anthicidae
Mecynotarsus
Mecynotarsus bidens

description: Mecynotarsus bidens sp. nov.
(Figs 27–29, 129, 146, 171)
Type locality. Australia, Northern Territory, Hull River, 33 km ESE of Docker River, 24°58′S 129°23′E.
Type material. HOLOTYPE: ♂, ‘ 24.58S 129.23E Hull River 33 km ESE of Docker River NT 17.xi.1977 T.A. Weir [p] // ANIC specimen [p; green label]’ (ANIC). PARATYPES: 2 ♂♂ 2♀♀, same data as holotype (ANIC); 2♂♂ 1 ♀, ‘ Hull River 33 km ESE of Docker River NT 17 Nov. 1977 J.A. L. Watson [h] // ANIC specimen [p; green label]’ (ANIC); 2 ♂♂, ‘ 24.20S 132.53E NT Finke River at Running Water 15 March 1995 T. Weir, at light [p] // ANIC specimen [p; green label]’ (ANIC); 1 ♂ 8 ♀♀ ‘ 23.01S 134.29E Ongeva Creek 99 km NE of Alice Springs N. T. 13 Oct. 78 M. S. Upton [p] // AUST. NAT. INS. COLL. [p; green label]’ (ANIC, 2 spec. ZKDC); 2 ♂♂ 1 ♀, ‘ Australien Alice Springs, NT 3.10.1972 [p] // Mecynotarsus albellus Pascoe det. G. Uhmann 2004 [p]’ (ZSMC, ZKDC); 1♂, ‘ 23.44S 133.44E Temple Bar Gap 15 km W by S of Alice Springs N. T. 7 Nov. 1979 I. D. Naumann [p] // AUST. NAT. INS. COLL. [p; green label]’ (ANIC); 1 ♀, ‘ AUSTRALIA, N. Territory West MacDonnell Range Nat. Park, SIMPSON GAP 23°40′S 133°43′E, 600 m, 11.01.2009, St. Jakl leg. [p]’ (ZKDC); 1 ♀, ‘ 3 mi. NE. of Gosses Bluff NT. 10 Apr. 1969 23.48S 132.21E H. Pelz [p] // AUST. NAT. INS. COLL. [p; green label]’ (ANIC); 1 ♂ 1 ♀, ‘ AUSTRALIA, NT, Watarka Nat. Park, near Kathleen Springs, sand dunes, 24°18′S 131°34′E, 620 m, 6.- 8.01.2009, St. Jakl leg. [p]’ (ZKDC, NMPC); 1 ♀, ‘ 55 mi. S. of Birdsville, Qld. 24.x.66 light trap J. G. Woods [p] // ANIC specimen [p; green label]’ (ANIC); 1 ♂ 1 ♀, ‘ AUSTRALIA, Queensland,“ Dig Tree ”, U.V. light trap, 22.XI.1998, leg. G. Hangay [p]’ (HNHM); 1 ♂, ‘ Qld. Greenvale 70 Km SW at light 21-31 Oct. 95 A. J. Watts [p] // SAMA Database No. 25- 029026 [p]’ (SAMA); 1 ♀, ‘QLD. 70 km SW GREENVALE. 15-24 FEB 95 A. J. WATTS [p] // SAMA Database No. 25-029018 [p]’ (SAMA); 2 ♀♀, same data, except database number: 25-029041 or 25-029007 (SAMA); 1 ♂, ‘S. Aust.At light. Levi Crk. 8 km NW Big Perry Spring 28°19.2′ 136°16.1′ 7 Dec. 1974. J.A. Herridge. [p] // SAMA Database No. 25-028875 [p]’ (SAMA); 4 ♂♂ 5 ♀♀, same data, except database number: 25-028876, 25-028878 to 25-028885 (SAMA); 1 ♀, ‘S. Aust. Margaret R 10 km SE Coward Springs. At light. 3 Dec. 1974. J. A. Herridge. [p] // SAMA Database No. 25-028886 [p]’ (SAMA); 1 ♂, same data, but database number: 25-0258887 (SAMA); 1 ♀, ‘ 6 mi. S Copley, S. AUSTRALIA XI-29-1951 W. L. Brown Ck. bottom at lt. [p] // Mecynotarsus albellus Pascoe det. DSChandler [p+h]’ (DCDC); 1 ♂, ‘ Broken Hill N.S.W. R. J. Burton’ (SAMA).
Description (holotype, male). Body length 3.4 mm. Body reddish, elytra unicolorous; legs and antennae reddish.
Antero-lateral margins of frons projecting as small, tooth-like, apically pointed processes (Figs 27, 129). Gular rugules of different sizes, anteriorly larger, ordered and fused as in Fig. 139. Clypeal granules conspicuous, protruding and somewhat pointed (Fig. 129, marked by arrow). Setation of head vertex comparatively long, mostly appressed to subdecumbent, with numerous very long setae in median line and basally, distinctly shorter and coarser, nearly scaly ventro-laterally along eyes. Antennae moderately long; antennomere I rather robust and wide apically, somewhat curved (asymmetrical), antennomeres III–V about twice, X 1.2 times as long as wide; setation mostly fine, inconspicuous, distinctly coarser in basal half, especially antennomere I very densely, coarsely setose, including several long bristly setae.
Pronotum globose to moderately transverse, 1.3 times as long as wide, its lateral margins rather strongly, evenly convex in dorsal view; posterior collar very narrow and inconspicuous. Pronotal horn robust and wide, triangular, its posterior angles distinctly protruding in dorsal view (Fig. 146); horn margins armed with 4 wide lobules on each side, apical lobule widely rounded; horn crest distinct, moderately wide, with coarse rugules on margins; submarginal rugules distinct, rather unevenly spaced, at places contiguous to fused; median rugules mostly fused and forming conspicuous irregular sculpture, connected with rugules of crest margins, several minute, well spaced granules posteriorly. Setation pale reddish, scaly and quite appressed; scales on pronotal disc rather uniformly large, round and contiguous, entirely covering surface (possibly some smaller scales present), rather opaque; antebasal paired setae present laterally and absent medially, several tactile setae present antero-laterally.
Elytra 1.7 times as long as wide; omoplates and postbasal impression absent. Setation very similar to that on pronotal disc, scales pale reddish, appressed, extremely dense, uniform, entirely covering surface (Fig. 171); scattered tactile setae absent, but some longer, raised setae present on humeri (margins sloping towards base).
Male characters. Sternum VII with moderately produced, rounded apex. Tergum VII rather widely rounded and moderately emarginate posteriorly (Fig. 28). Aedeagus as in Fig. 29.
Variation. Body length (♂ ♀) 2.9–3.4 mm; fused median rugules sometimes narrowly connected with rugules of crest margins.
Differential diagnosis. Mecynotarsus bidens sp. nov. is undoubtedly very close to M. bidentatus sp. nov., as suggested by their nearly identical external appearances (body form, setation, paired frontal process), and similarity of male characters. It differs from the latter species by the conspicuous clypeal granules, rather symmetrical metatarsomere II, which is evenly, moderately widening towards the apex, and by the shape of the frontal process and parameres.
Etymology. Composed from Latin words bis (twice) and dens (tooth); named in reference to the presence of the paired, tooth-like processes of the frontal margins; noun in apposition.
Distribution. Australia: New South Wales, Northern Territory, Queensland, South Australia.
description: Published as part of Kejval, Zbyněk, 2013, Taxonomic revision of the Australian Notoxinae (Coleoptera: Anthicidae), pp. 1-98 in Acta Entomologica Musei Nationalis Pragae (suppl.) (suppl.) 53 on pages 26-27, DOI: 10.5281/zenodo.4272709