Apatenia stysi, Tryzna & Banar, 2013

TRÝZNA, MILOŠ & BAŇAŘ, PETR, 2013, A new species of the genus Apatenia (Coleoptera: Anthribidae) from Madagascar with notes on female genitalia, redescription of the female of Apatenia quadristigma Frieser and list of Madagascan species, Zootaxa 3609 (5), pp. 504-512 : 505-507

Apatenia stysi sp. nov.

( Figs. 1–4 , 8, 10–11, 13–18 )

Type locality. North-west Madagascar, Mahajanga Province, Andranofasika town surroundings, approximately 100 m a.s.l.

Material examined. Holotype female, labelled: ‘N MADAGASCAR, / Mahajanga env., / ANDRANOFASIKA env. / Z. Mráček leg., 2.I. 2003 [p, white label] // HOLOTYPE / Apatenia stysi sp. nov. / M. Trýzna & P. Baňař det.’ [p, red label] ( BSNPC); paratype female, the same locality as holotype, specimen with red label ‘ PARATYPE / Apatenia stysi sp. nov. / M. Trýzna & P. Baňař det.’ ( MMBC). Both specimens are dry mounted on rectangular card, holotype without left fore leg, paratype without right fore leg .

Description. Female holotype; (female paratype). Measurements (in mm): Total body length—6.32 (6.67). Head: total length—1.33 (1.47); length of rostrum—0.91 (0.93); maximum width of rostrum—1.09 (1.11); length of eye—0.42 (0.53); maximum width across eyes—1.38 (1.44); minimum distance between eyes—0.76 (0.78). Antenna: length of segments: II—0.18 (0.22), III—0.36 (0.34), IV—0.26 (0.27), V—0.27 (0.25), VI—0.24 (0.22), VII—0.23 (0.22), VIII—0.16 (0.17), IX—0.29 (0.26), X—0.22 (0.18), XI—0.31 (0.28). Pronotum: maximum length—1.71 (1.82); width at carina—2.24 (2.49); minimum width—1.42 (1.44). Elytra: maximum length—2.92 (3.07); maximum width—2.42 (2.71).

Colouration of the cuticle generally black, meso- and metasternum partially dark brown; anterior-most part of pronotum somewhat paler brownish. Scape dark brown, rest of antennae black. Cuticle semi-lustrous.

Vestiture on head, pronotum and distal third of elytra light brown, setae longer and wider on anterior half of pronotum, giving pale brown colouration to this part ( Figs. 1–2 ). Distal part of elytra similar, with setae forming a pale brown transverse strip. Proximal two thirds of elytra with blackish vestiture, except for four characteristic transverse spots, formed by long, wide, scale-like whitish setae ( Figs. 1, 4 ). Vestiture on antennae short, appressed, blackish. All legs covered with dense black setae, dorsal face of all femora, tibiae and tarsi with narrow, contrasting strips comprised of white setae (these narrow strips occur also on meso- and meta-sternum). Prosternum and venter of abdomen with whitish pubescence.

Structure. Head long and narrow ( Figs. 3 , 8 ), rostrum flat, simple, without longitudinal carina, ratio of rostrum length to maximum width 0.83. Scrobes not visible dorsally, scape partly hidden in scrobe in dorsal view. Eyes small, ocular index 2.45. Ratio of maximum width across eyes to maximum width of rostrum 1.27. Antennae ( Figs. 1 , 10 ) sub-equal in length to head and pronotum together. Funicle and club thin.

Pronotum transverse, ratio of length to width at carina 0.76, gradually narrowed anteriorly, widest at dorsal transverse carina. Dorsal transverse carina bisinuate ( Fig. 13 ), conspicuously convex in the middle, lateral margins in obtuse arch directed anteriorly ( Fig. 2 ).

Elytra broadly oval ( Fig. 1 ), conspicuously narrowed posteriorly from two thirds of their length. Ratio of the maximum length of elytra to maximum width 1.20.

Abdomen shorter than broad ( Fig. 11 ), pygidium ( Fig. 14 ) robust, ratio of maximum width to maximum length 1.21.

Female genitalia. Sternite of segment 8 with long apodeme ( Fig. 16 ), slightly widened apically. Hemisternites wide and robust ( Fig. 15 ), apex of each with robust, strongly sclerotized toothed plate ( Figs. 15, 17 ). Toothed plate without (or with extremely reduced?) stylus, with group of 5–6 strong setae on base. Bursa copulatrix simple ( Fig. 18 ) with small sclerites at insertion of spermathecal duct. Spermatheca strongly sclerotized, sickle-shaped, spermathecal gland spherical ( Fig. 18 ).

Male unknown.

Etymology. Patronym, dedicated to our teacher and friend, Professor Pavel Štys, eminent scholar of many groups of true bugs (Heteroptera).

Distribution. North-west Madagascar ( Fig. 19 ).

Differential diagnosis. Female Apatenia stysi sp. nov. differs from female A. quadristigma Frieser, 1981 by larger body length (more than 6 mm; 4.33 mm in allotype of A. quadristigma ); much smaller eye (ocular index 2.45; 0.59 in A. quadristigma ); shape of dorsal pronotal carina ( Figs. 12–13 ) and different colour patterns of the dorsum of body ( Fig. 1 ). Apatenia stysi sp. nov. differs from all other Madagascan species of the genus Apatenia (with an exception of A. quadristigma ) by its totally different colour pattern composed mainly of four characteristics transverse white spots on the elytra ( Figs. 1, 4 ).

Figures

FIGURE 19. Distribution of Apatenia stysi sp. nov. and A. quadristigma Frieser, 1981 in Madagascar.

FIGURES 1–4. Apatenia stysi sp. nov., female holotype, 1, habitus dorsal view; 2, head and pronotum, lateral view; 3, head, dorsal view; 4, habitus lateral view. Scale bars in mm.

FIGURES 7–14. 7, 9, 12, Apatenia quadristigma Frieser, 1981, female allotype; 8, 10–11, 13–14, Apatenia stysi sp. nov., female holotype; 7–8, head, dorsal view; 9–10, right antenna; 11, abdomen, ventral view; 12–13, dorsal pronotal carina; 14, pygidium, posterior view. Scale bars in mm. Lettering: mcxc—metacoxal cavity; S1–S5—sternites 1 to 5, respectively.

FIGURES 15–18. Apatenia stysi sp. nov., female holotype, genitalia; 15, hemisternites, ventral view; 16, segment 8, ventral view; 17, toothed plate of right hemisternite, ventral view; 18, bursa copulatrix and spermatheca. Scale bars in mm. Lettering: ap—apodeme; bc—bursa copulatrix; dl—dorsal lobe; lr—lateral rod; mo—median oviduct; mr—median rod; S8—sternite 8; sp—spermatheca; spd—spermathecal duct; spg—spermathecal gland; T8—tergite 8; vl—ventral lobe.