Mecynotarsus exophthalmus, Kejval & Cz, 2013

Kejval, Zbyněk, 2013, Taxonomic revision of the Australian Notoxinae (Coleoptera: Anthicidae), Acta Entomologica Musei Nationalis Pragae (suppl.) 53, pp. 1-98 : 38-40

Mecynotarsus exophthalmus sp. nov.

( Figs 47, 48 , 131 )

Type locality. Australia, Western Australia, 13 km E by N 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).

Description (holotype, male). Body length 2.5 mm. Body, legs, and antennae reddish brown.

Antero-lateral margins of frons simple. Gular rugules of different sizes, anteriorly larger, ordered and fused as in Fig. 139 . Clypeal granules distinct. Head vertex distinctly impressed along median margins of eyes ( Fig. 131 ). Setation of head rather fine, hairy, appressed to subdecumbent on vertex, with some longer, more erect setae near base, and distinctly coarser ventro-laterally. Antennae rather moderately long; antennomeres III–V at most 1.8 times as long as wide, X nearly as long as wide; setation generally rather hairy, mostly fine, coarser and longer in basal antennomeres, especially antennomere I with numerous longer, stiff setae.

Pronotum globose to moderately transverse, 1.4 times as long as wide, its lateral margins rather strongly, nearly evenly convex in dorsal view; posterior collar very narrow and inconspicuous. Pronotal horn robust, subtriangular, wide basally, posterior angles distinct; horn margins armed with 4 wide lobules on each side, apical lobule distinctly bilobed; horn crest conspicuous, strongly raised, situated rather posteriorly, with coarse rugules on margins; submarginal rugules numerous, rather coarse and distinctly spaced; median rugules largely fused and forming irregular sculpture, which is narrowly connected even with rugules of crest margins, some minute granules scattered posteriorly. Setation whitish, scaly and appressed, indistinct on pronotal horn dorsally; scales on pronotal disc of two sizes, generally rather short and widely rounded apically, somewhat glossy; antebasal paired setae absent medially and present laterally, but difficult to distinguish from additional tactile setae (several on each side).

Elytra 1.8 times as long as wide; omoplates and postbasal impression absent. Setation whitish to pale reddish, uniformly scaly, appressed and evenly ordered; scales shortly oval, rounded to subtruncate apically, densely but distinctly spaced; humeri and basal margin with numerous bristly setae, scattered tactile setae absent.

Male characters. Sternum VII slightly sinuous posteriorly. Tergum VIII and aedeagus as in Figs 47, 48 .

Differential diagnosis. Mecynotarsus exophthalmus sp. nov. may resemble M. pilbarensis sp. nov. by the body form and setal characters, but differs by the shorter, more compact and posteriorly situated horn crest, the more robust antennae, the head vertex distinctly narrowly impressed along the median margins of the eyes, and by the shape of the parameres (cf. Fig. 48 versus 103).

Etymology. The species epithet is Latinized adjective exophthalmus , -a, -um, composed of the Greek words exo (= outer) and ophthalmos (= eye); named in reference to the bulging eyes of this species.

Distribution. Australia: Western Australia.

Figures

Figs 47–52. 47–48 – Mecynotarsus exophthalmus sp. nov.: 47 – tergum VIII, 48 – aedeagus in dorsal view. 49–50 – M. fallax sp. nov.: 49 – tergum VIII, 50 – aedeagus in dorsal view. 51–52 – M. festivus sp. nov.: 51 – tergum VIII, 52 – aedeagus in dorsal view. Scale (0.1 mm): A – Fig. 50; (0.5 mm): B – Fig. 51; C – Figs 47–49, 52.

Figs 126–132. 126–127 – body in lateral view: 126 – Leptoprion angulatus Krekich-Strassoldo, 1914, 127 – Mecynotarsus apicipennis Lea, 1895 (syntype). 128–133 – head: 128 – M. bicornis sp. nov., 129 – M. bidens sp. nov. (paratype, Onheva Creek), 130 – M. excavatus sp. nov. (paratype,Aoue-Enga), 131 – M. exophthalmus sp. nov., 132 – M. kingii MacLeay, 1872 (Shoalhaven River Gorge).

Figs 133–140. 133 – Mecynotarsus setulosus sp. nov., head in lateral view (paratype, Fowlers Gap), 134 – M. excavatus sp. nov., apex of elytra in female (paratype, Aoue-Enga), 135 – M. grandior sp. nov., apex of elytron in male (paratype, Kimberley Research Station), 136 – M. obesus sp. nov., metatibia with tarsus (paratype, Hull River), 137 – M. excavatus sp. nov., male protibia (paratype, Aoue-Enga). 138–140 – head in ventral view: 138 – M. auripilosus sp. nov. (paratype, Kambah Pool), 139 – M. bullatus sp. nov. (paratype, Regans Ford), 140 – M. ziczac King, 1869 (Swain Reefs).