Trachyphloeosoma honza, Ren & Borovec & Zhang, 2020

Ren, Li, Borovec, Roman & Zhang, Runzhi, 2020, On Chinese Trachyphloeini with description of four new species (Coleoptera, Curculionidae, Entiminae), ZooKeys 974, pp. 93-119 : 93

Trachyphloeosoma honza sp. nov. Figs 19 , 20 , 36 , 40 , 42 , 44 , 48 , 54

Trachyphloeosoma advena : Borovec 2009: 78 (check-list); Borovec 2014: 12 (note); Alonso-Zarazaga et al. 2017: 406 (catalogue). non Zimmermann, 1956.

Type locality.

China, Yunnan, Lunan.

Material examined.

Holotype. China - Yunnan Prov. • 1 ♂; Lunan - env., Stone Forest; 29 Jul. 1995; Z. Jindra leg.; NMPC. Paratypes. CHINA - Yunnan Prov. • 10 ♀♀; 14 km SE Tengchong, Renjiafen env.; 24°56.43'N, 98°35.52'E; 2145 m a.s.l.; (CH06) 23 Jun. 2016; J. Hájek & J. Růžička leg.; sift ♯05, border of old orchard, wet debris under trees; NMPC; • 2 ♀♀; same data as for preceding; RBSC; • 1 ♀; same data as for preceding; IZCAS; • 2 ♀♀; Tengchong city, Laifeng Shan Forest Park; 25°01.24'N, 98°28.94'E; 1800 m a.s.l.; (CH05) 22 Jun. 2016; J. Hájek & J. Růžička leg.; sift ♯04, dense mixed forest above tombs near track, wet debris in terrain depressions; NMPC.

Description.

Body length: 1.87-2.39 mm, holotype 2.13 mm.

Body (Figs 19 , 20 ) unicoloured piceous brown, antennae and legs slightly paler, reddish brown. The entire body except for frons, antennal funicles with clubs and tarsi covered with a brownish earth-like incrustation which conceals most of the surface; rounded appressed scales, covering the whole body, very hardly visible through this incrustation. Elytra with one conspicuous, dense row of erect, subspatulate setae on each interval, starting just from the base; setae approximately as long as half width of one interval, slightly enlarged apicad, distance between two setae slightly longer than length of one seta. Pronotum and head with rostrum with similar setae, less than half as long as elytral ones, densely irregularly scattered, anteriorly directed. Antennal scapes, femora and tibiae with long, erect, very slender setae, distinctly prominent from outline of scapes and legs.

Rostrum (Figs 19 , 20 , 36 ) 1.25-1.31 × wider than long, at base 1.18-1.23 × wider than at apex, evenly tapered anteriad with almost straight sides, at short basal part with shallowly concave sides; in profile short and wide, convex. Epifrons distinctly tapered anteriad with straight sides, at level of antennal insertion narrow, 0.65-0.68 × as wide as corresponding width of rostrum, with ill-defined, shallow, longitudinal furrow. Frons conspicuous, glabrous, smooth and shiny, posteriorly continuous with epifrons. Epistome indistinct. Antennal scrobes in dorsal view fully visible as furrows, reaching eyes; in lateral view with dorsal margin directed towards middle of eye and ventral margin deeply below ventral margin of eye. Eyes small, in dorsal view protruding from outline of head; in lateral view placed in dorsal third, distance from dorsal margin of head longer than diameter of eye.

Antennae moderately long, scapes slightly exceeding anterior margin of pronotum and longer than funicle, weakly regularly curved, in apical half slightly gradually thickened to apex, at apex 0.7-0.8 × as wide as club. Funicle segment 1 bead-shaped, 1.5-1.6 × longer than wide and 1.3-1.4 × longer than segment 2, which is 1.5-1.6 × longer than wide; segments 3-7 successively wider, segment 3 and 4 1.3-1.4 ×, segment 5-6 1.6-1.7 ×, segment 7 1.9-2.0 × wider than long. Clubs ovoid, large, 1.4-1.5 × longer than wide.

Pronotum (Figs 19 , 20 ) 1.17-1.22 × wider than long, widest at midlength, with distinctly rounded sides; anterior margin distinctly narrower than posterior one; disc flatly and irregularly granulate; in lateral view pronotum slightly convex, anterior margin strongly obliquely directed back beneath towards coxae.

Elytra (Figs 19 , 20 ) oval, 1.23-1.29 × longer than wide, widest at midlength, with regularly rounded sides. Striae coarsely punctate, wider than intervals, striae only slightly impressed between punctures; separation of punctures much shorter than their diameters. Intervals very narrow, somewhat convex, smooth.

Protibiae (Fig. 40 ) short and robust, 4.8-5.2 × longer than wide at midlength, at apical quarter indistinctly curved inwards with mesal edge slightly bisinuate, apically bluntly truncate, with dense fringe of fine but long yellowish setae, shorter in mesal than in lateral part and with long and slender yellowish mucro. Tarsi short, tarsomere 2 1.4-1.5 × wider than long; tarsomere 3 1.2-1.3 × wider than long and 1.3-1.4 × wider than tarsomere 2; onychium (tarsomere 5) 1.1 × as long as tarsomere 3, widened apicad with very long, strongly divaricate claws, almost as long as exceeding part of onychium.

Abdominal ventrites 1.09-1.12 × longer than wide, sparsely roughly punctate; ventrite 2 slightly longer than ventrite 1 and distinctly longer than ventrites 3 and 4 combined; suture between ventrites 1 and 2 sinuous, the others straight. Metaventral process as wide as transverse diameter of metacoxa.

Penis (Fig. 42 ) short, 1.57 × as long as wide, subparallel-sided, slightly evenly enlarged apicad, in apical part shortly subtriangular, tip rounded, sides of tip shallowly concave; in lateral view moderately wide, ventral side almost straight, dorsal side irregularly rounded, tip pointed and curved upwards.

Female genitalia. Spermatheca with short and moderately wide cornu; corpus large, elongated; ramus and collum developed, identically sized, short and wide (Fig. 44 ). Sternite VIII with plate 1.5-1.6 × longer than wide, rhombic, without any fenestra (Fig. 48 ). Gonocoxites of ovipositor very slender and long, basally enlarged, in apical part rod-shaped, bearing slender and long, cylindrical stylus with apical setae.

Bionomics.

The majority of the material was collected by sifting wet debris under trees along the border of an old orchard.

Etymology.

The new species is dedicated to one of the collectors and a very good friend of the second author, Dr. Jan Růžička (University of Life Science, Prague). The Czech name Jan has its nickname “Honza”. The specific name is a noun in apposition.

Distribution.

China, Yunnan (Fig. 54 ).

Differential diagnosis.

Trachyphloeosoma honza sp. nov. shares with T. martin sp. nov. short and robust protibiae, short and wide rostrum and subspatulate setae. It is easily distinguished from T. martin sp. nov. by elytral setae on all elytral intervals, dorsal margin of antennal scrobes directed towards middle of eye and female sternite VIII lacking fenestra, while T. martin sp. nov. has elytral setae only on odd intervals, dorsal margin of scrobes directed above dorsal margin of eye and female sternite VIII with longitudinal fenestra. In comparison with non-Chinese species, T. honza sp. nov. is similar to T. advena Zimmerman, 1956, known from Japan, Korea and introduced to U.S.A. and T. ryukyuensis Morimoto, 2015, known from Japan, in the funicle being 7-segmented and body covered by appressed setae and elytra with raised setae on all intervals. It is possible to distinguish T. honza sp. nov. from both by short subspatulate setae, distinctly shorter than width of an elytral interval (long piliform setae on elytra, approximately as long as width of interval in T. advena and T. ryukyuensis ), elytral setae distinctly bent backwards in lateral view (perpendicularly erect in T. advena and T. ryukyuensis ) and plate of sternite VIII in females without fenestra (with fenestra in T. advena and T. ryukyuensis ).

Figures

Figure 54. Geographical distribution of new species of Trachyphloeosoma in China.

Figures 17 - 24. Habitus of species of Rhinodontus and Trachyphloeosoma: 17, 18 Rhinodontus sawadai, female, dorsal and lateral view 19, 20 Trachyphloeosoma honza sp. nov., paratype, female, dorsal and lateral view 21, 22 T. jirka sp. nov., paratype, female, dorsal and lateral view 23, 24 T. martin sp. nov., paratype, female, dorsal and lateral view. Scale bars: 1 mm.

Figures 36 - 41. Head with rostrum in dorsal and lateral view of Trachyphloeosoma species: 36 T. honza sp. nov. 37 T. jirka sp. nov. 38 T. martin sp. nov. 39 T. roelofsi; Protibiae of Trachyphloeosoma species: 40 T. honza sp. nov. 41 T. jirka sp. nov. Scale bars: 0.50 mm (36 - 41).

Figures 42 - 51. Terminalia of Trachyphloeosoma species: 42 Penis of T. honza sp. nov., dorsal and lateral view 43 Penis of T. martin sp. nov., dorsal and lateral view 44 Spermatheca of T. honza sp. nov. 45 Spermatheca of T. jirka sp. nov. 46 Spermatheca of T. martin sp. nov. 47 Spermatheca of T. roelofsi 48 Sternite VIII of T. honza sp. nov. 49 Sternite VIII of T. jirka sp. nov. 50 Sternite VIII of T. martin sp. nov. 51 Sternite VIII of T. roelofsi. Scale bars: 0.25 mm (42 - 47); 0.5 mm (48 - 51).