Cis lasoni, Królik, Roman, 2016

Królik, Roman, 2016, Two new species and nomenclatural changes in the Cis castaneus species group (Coleoptera, Ciidae), Zootaxa 4114 (4), pp. 492-500 : 495-496

Cis lasoni sp. nov.

( Figs 6–12 )

Differential diagnosis. Cis lasoni sp. nov. is allied to Cis jacquemartii and Cis glabratus , but its mean TL is lower. In shape, the body most closely resembles that of Cis jacquemartii , and the shape of the anterolateral angles of the pronotum is like that in Cis glabratus . The dorsal setation is much more pronounced than in Cis jacquemartii but is not as readily visible as in Cis glabratus . From both of these Cis lasoni sp. nov. is distinguished by the shiny region along the fronto-clypeal suture, devoid of any microstructure; in males by the fronto-clypeal ridge, which is not armed with any projections, the bigger and densely setose, oval patch on the first abdominal sternite, and the morphology of the male genitalia: the apical internal processes of the tegmen is more expanded and more diagonally truncate at the top, the penis tapers distinctly to a sharp point and extends farther to the apex than in either of the other two species.

Description. Holotype. ♂ Measurements in mm: TL 1.68; PL 0.57; PW 0.64; EL 1.11; EW 0.72; GD 0.65. Ratios: PL/PW 0.89; EL/EW 1.54; EL/PL 1.96; GD/EW 0.90; TL/EW 2.32. Body ( Figs 6–7 ) elongate, subcylindrical; dorsal and ventral surface dark brown with slightly paler elytra; antennae, mouthparts, legs, and other ventral sclerites yellowish brown; dorsal and ventral sides of body bearing very short, fine, sparsely distributed hairs that are inconspicuous and hardly visible at medium magnification (starting at x40). Only the middle parts of the sternites have longer hairs. Head extending relatively far from pronotum, weakly convex; fronto-clypeal ridge not produced forwards; surface of head minutely punctate, distinctly shagreened except for a shiny region along the fronto-clypeal suture. Antennae 10-segmented; 3rd segment 1.75 times as long as 4th; 8th to 10th forming a loose club; CL/FL 0.757. Pronotum widest behind the middle; anterior margin broadly rounded; anterior corners obtusely angulate, hind angles broadly rounded in lateral view ( Fig. 8 ); lateral margins slightly reflexed and visible from above in posterior half; sides nearly arcuate; basal margin narrowly ridged; disc irregularly and conspicuously punctate; punctures uniform in size, small, separated by a distance equal to about 2 to 3 times their diameters; interstices between punctures distinctly reticulate. Scutellum subtriangular, with some small punctures. Elytra subparallel, slightly divergent from base to two-thirds, then gradually convergent apically; surface shiny, rather closely and irregularly punctate; punctures of two sizes, the larger ones shallow and umbiliform, distinctly larger than those on pronotum, the smaller ones very small and inconspicuous. Prosternum in front of coxae medio-longitudinally carinate, transversely and somewhat deeply depressed before each coxa; prosternal process rather narrow, subparallel-sided. Each protibia with a toothed outer apical angle. First abdominal ventrite bearing large, oval patch, densely setose, its greatest diameter one-third the length of the ventrite at the middle ( Fig. 7 ).

Male genitalia and pre-genital segment (paratype). 8th abdominal tergite with apical margin widely rounded and armed with relatively long hairs that become ever shorter towards the sides ( Fig. 9 ); 8th abdominal sternite subtrapezoidal, with apical margin weakly emarginate in the middle, armed with relatively long hairs at the lateral corners ( Fig. 10 ). Tegmen rather stout, expanding to the apex, apical internal processes expanded and diagonally truncate at the top, longer than external processes ( Fig. 11 ); penis distinctly extending to three-quarters of its length, then tapering to a sharp point ( Fig. 12 ).

Females. Similar to males, but devoid of the abdominal sex patch.

Type material. Holotype: ♂, Azerbaijan: Talysh Mts., Lerik rayonu, 2 km N of Peştətük, 38o46’N / 48o34’E, 372 m amsl, 2–3.VI.2010, leg. RK (coll. USMB). Paratypes: 1♂ 2♀, the same data as holotype; 1♀, Talysh Mts., Lerik rayonu, 2 km N of Lerik, Xiramo env., 38o48’N / 48o25’E, 940 m amsl, 7–10.V.2014, leg. RK; 1♂ 1♀, Iran: Alborz Mts., Golestān Prov., 11 km SE of Minudasht, 37o10’N / 55o28’E, 447 m amsl, 13–15.VI.2015, leg. RK (coll. RK, RR).

Variation. Males, measurements in mm (n=3 including holotype): TL 1.68–1.70 (1.69 ±0.02); PL 0.57 (±0.01); PW 0.64 (±0.01); EL 1.11–1.12 (1.12 ±0.01); EW 0.72–0.74 (0.73 ±0.01); GD 0.65–0.66 (0.65 ±0.01). Ratios: PL/PW 0.89–0.90 (0.90 ±0.03); EL/EW 1.52–1.53 (1.53 ±0.03); EL/PL 1.93-1.96 (1.94 ±0.05); GD/EW 0.89-0.90 (0.89 ±0.03); TL/EW 2.31–2.33 (2.32 ±0.06).

Females, measurements in mm (n=4): TL 1.55–1.87 (1.67 ±0.02); PL 0.54–0.64 (0.57 ±0.01); PW 0.59–0.65 (0.64 ±0.01); EL 1.01–1.24 (1.10 ±0.01); EW 0.68–0.74 (0.73 ±0.01); GD 0.60–0.69 (0.65 ±0.01). Ratios: PL/PW 0.87–0.91 (0.89 ±0.03); EL/EW 1.46–1.55 (1.51 ±0.03); EL/PL 1.88–2.02 (1.94 ±0.05); GD/EW 0.87–0.93 (0.90 ±0.03); TL/EW 2.22–2.34 (2.30 ±0.06).

Distribution and habitat. This species is known only from deciduous, broadleaved forests on the lower slopes of the Talysh ( Azerbaijan) ( Fig. 21 ) and Alborz Mts. ( Iran) ( Fig. 22 ) with oriental beech Fagus orientalis Lipsky , chestnut-leaved oak Quercus castaneifolia C. A. Mey. , European hornbeam Carpinus betulus L. and Caucasian zelkova Zelkova carpinifolia (Pall.) K. Koch. Host fungi unknown.

Etymology. I dedicate the new species to my friend, Andrzej Lasoń (Białystok, Poland), a specialist in Kateretidae and Nitidulidae (Coleoptera) and my companion in many entomological expeditions.

Figures

FIGURES 6 – 12. Cis lasoni sp. nov. 6, holotype, ♂ (USMB) dorsal aspect, 1.68 mm; 7, the same, ventral aspect; 8, the same, fronto-lateral aspect; 9, paratype, eighth abdominal tergite; 10, the same, eighth abdominal sternite; 11, the same, tegmen; 12, the same, penis. Scale bars = 0.1 mm.

FIGURES 21 – 22. Collecting sites. 21, Azerbaijan, Talysh Mts., Lerik rayonu, 2 km N of Peştətük (locus typicus of Cis lasoni sp. nov. and Cis lugowoji sp. nov.); 22, Iran, Alborz Mts., Golestān Prov., 11 km SE of Minudasht (the locality where Cis lasoni sp. nov. was captured).