Mecynotarsus bidentatus, Kejval & Cz, 2013

Kejval, Zbyněk, 2013, Taxonomic revision of the Australian Notoxinae (Coleoptera: Anthicidae), Acta Entomologica Musei Nationalis Pragae (suppl.) 53, pp. 1-98 : 27-28

publication ID	https://doi.org/ 10.5281/zenodo.4272709
publication LSID	lsid:zoobank.org:pub:37E0BCFC-F84A-4B2E-B554-0DC4AE42AD15
DOI	https://doi.org/10.5281/zenodo.4338848
persistent identifier	https://treatment.plazi.org/id/03E1270F-FFDE-FF8C-FE42-D7632775FA8F
treatment provided by	Felipe
scientific name	Mecynotarsus bidentatus
status	sp. nov.

Treatment

Mecynotarsus bidentatus sp. nov.

( Figs 30–32 View Figs 23–32. 23–25 )

Type locality. Australia, Western Australia, 13 km EN of Newman, 23°15′S 119°52′E.

Type material. HOLOTYPE: ♂, ‘(23.15S 119.52E) 13 km. E. by N. of Newman, WA. 12.xi.70, E. B. Britton [p] // ANIC specimen [p; green label]’ ( ANIC). GoogleMaps

Description (holotype, male). Body length 2.4 mm. Body reddish, elytra nearly unicolorous; legs and antennae reddish.

Antero-lateral margins of frons projecting into small, posteriorly pointed process ( Fig. 30 View Figs 23–32. 23–25 ). Gular rugules of different sizes, anteriorly larger, ordered and fused as in Fig. 139 View Figs 133–140. 133 . Clypeal granules indistinct. Setation of head vertex comparatively long medially and with some raised longer setae at base, distinctly shorter and coarser to scaly along eyes, especially ventro-laterally. Antennae rather short; antennomeres III–V about 1.6 times, X nearly as long as wide; setation mostly fine, hairy, distinctly coarser on basal antennomeres, especially antennomere I with distinct scales and several long bristly setae.

Pronotum globose to moderately transverse, 1.4 times as long as wide, its lateral margins rather strongly and nearly evenly convex in dorsal view; posterior collar very narrow and inconspicuous. Pronotal horn robust, moderately wide, subtriangular, its posterior angles distinct in dorsal view; horn margins armed with 4 and 5 lobules laterally, apical lobule asymmetrical (nearly fused with lateral lobule); horn crest distinct, moderately wide, with coarse rugules on margins; submarginal rugules distinct, rather unevenly spaced; 7 median rugules, mostly rather large and asymmetrical, smaller to minute posteriorly. Setation greyish to pale reddish, scaly and appressed; pronotal horn dorsally nearly asetose; scales on pronotal disc rather uniformly large, round shaped, contiguous, entirely covering surface (possibly some smaller scales present), rather opaque; antebasal paired setae absent medially and difficult to distinguish laterally, owing to presence of another tactile setae (about 7 on each side).

Elytra nearly 1.8 times as long as wide; omoplates and postbasal impression absent. Setation very similar to that on pronotal disc, scaly, pale reddish and brownish, forming very vague marking; scales distinctly smaller than those on pronotum, appressed, uniformly rounded, very dense, entirely covering surface as in Fig. 171 View Figs 168–176 ; scattered tactile setae absent, but some stiff, more raised setae present on humeri (margins sloping towards base).

Male characters. Sternum VII moderately produced and rounded medially. Tergum VIII and aedeagus as in Figs 31, 32 View Figs 23–32. 23–25 .

Differential diagnosis. Mecynotarsus bidentatus sp. nov. is undoubtedly very close to the preceding M. bidens sp. nov. It differs from the latter species by the indistinct clypeal granules, the somewhat asymmetrical metatarsomere II, which is rather strongly enlarged in the apical half, and by the different shapes of the frontal processes and the parameres.

Etymology. The species name is a Latin adjective bidentatus , -a, -um, composed from the words bis (twice) and dentatus (toothed); named in reference to the presence of the paired, tooth-like processes of the frontal margins.

Distribution. Australia: Western Australia.