Neostylopyga yemenica ( Bey-Bienko, 1969 ) Anisyutkin & Telnov, 2018

Anisyutkin, Leonid N. & Telnov, Dmitry, 2018, New data on the cockroaches previously attributed to the genus Duchailluia Rehn, 1933 (Dictyoptera: Blattidae: Blattinae), Zootaxa 4532 (4), pp. 523-538 : 533-536

Neostylopyga yemenica ( Bey-Bienko, 1969) comb. nov.

( Figs. 3 I–L, 6A–E, 7A–E)

Material: Holotype. male, YEMEN, Sana'a city, spring 1960, leg. K. Suvorova ( ZIN).

Redescription of male (holotype). The original description ( Bey-Bienko 1969) to be supplemented with the following details:

General color light reddish brown, ocellar spots and anteclypeus yellow. Head wide and rounded, slightly longer than wide ( Fig. 6A ); epicranial sutures absent; eyes small; ocellar spots small, but distinct; distance between eyes 1.2 times eye length; distance between antennal sockets 2.1 times of the scape length (about 0.5 mm); approximate length ratio of 3rd–5th maxillary palpomeres 1.1: 1.0: 1.2. Pronotum campaniform, with caudal margin slightly angulate ( Fig. 6B ). Tegmina reduced to lateral flaps, with traces of venation, marginated laterally and rounded apically ( Fig. 6B ). Wings absent. Mesonotum and metanotum transverse, with weak medial impressions and caudal margins slightly angulate ( Fig. 6B ). Thoracal tergites and abdominal tergites II–VI marginated laterally ( Fig. 6B ). Anterior margin of fore femur armed as in the type A, with 14–15 spines, including 2 apical ones. Fore tibiae not thickened distally. Tibial spines well developed. Tarsi of mid and hind legs broken off. Fore tarsi: Basal tarsomere of fore tarsi (metatarsus) shorter than other segments combined, with 2 more or less equal rows of spines along lower margin; all euplantulae absent or vestigial; claws symmetrical, simple; arolium vestigial. Abdomen without visible glandular specializations; posterolateral angles of tergites attenuate caudally; tergite VI with caudal margin sinusoidally curved ( Fig. 6B ); tergite VII roundly projected caudally, with small median incision ( Fig. 6C ). Anal plate (tergite X) caudally protruded, with distinct median incision on caudal margin ( Fig. 6D ). Cerci broken off. Hypandrium weakly asymmetrical, wide, antero-lateral parts (lateral sternal apodemes or apophyses) elongated; caudal margin angulate between styli ( Fig. 6E ); styli broken off.

Male genitalia ( Figs. 3 I–L, 7A–E): left phallomere ( Fig. 3 I–L) with sclerite L4C (L2D) long and narrow, caudally terminating in bulky process ( Fig. 3J, K, b.p .); elongated field densely covered with teeth situated along L4C ( Fig. 3I, K, t.f .); sclerite L3 (L3d) robust, curved in apical part, with directed downward tooth; sclerite L4E, plate-like and curved; sclerite L4F weakly sclerotized, caudally fused with caudal process of sclerite L2; sclerite L4D (L 3v) large ( Fig. 3I, J ); sclerite L2 (L 2v) large, widened cranially ( Fig. 3K, L ), terminating in apically curved partly membranous caudal process ( Fig. 3K, L, a.p .); 2 partly sclerotized lobes situated above L2: ventral lobe ( Fig. 3K, v.l .) with short toothed outgrowth at caudo-ventral angle and dorsal lobe ( Fig. 3K, d.l .), dorsally with setal brush; sclerite L1 small. Ventral phallomere L4G (VP) large, as in Fig. 7D, E . Right phallomere complex in shape, as in Fig. 7 A–C; basal sclerite (R2) large; sclerite R1H plate-like, with 2 medially directed spines and narrow cranial outgrowth ( Fig. 7A, c .out.); sclerite R1G large, with single curved apical tooth ( Fig. 7 A–C, a.t.); sclerite R3 large, plate-like.

Measurements (mm). Head length: 4.8, width 4.5, pronotum length 6.5, width 8.9, mesonotum length 3.0, tegmina length 4.8, width 3.2, metanotum length 2.4, width 9.8.

Notes. This species was described from the basis of two damaged specimens (male holotype and female paratype) and provisionally ascribed to the genus Duchailluia (see Bey-Bienko 1969). The structure of the male genitalia were not studied.

The structure of the male genitalia of N. yemenica is dissimilar to those of the genera Duchailluia and Distylopyga (see above). On the contrary, the structure of the male genitalia of N. yemenica generally resembles N. rhombifolia , the type species of the genus Neostylopyga . There are mutual characters in N. yemenica and N. rhombifolia : left phallomere with sclerite L4C long and narrow, sclerites L4E and L4F separated, sclerite L2 widened cranially, terminating in caudal process, 2 partly sclerotized lobes situated on inner side of phallomere (compare Fig. 3 I–L and Fig. 5 –8 in Anisyutkin 2010); right phallomere with sclerite R1H plate-like, with 2 spines and narrow cranial outgrowth (compare Fig. 7 A–C and Fig. 4 in Anisyutkin 2010).

Taking into consideration the aforesaid, we herewith transfer N. yemenica to the genus Neostylopyga .

The sclerites R1H and R1G of Neostylopyga are similar to those of Deropeltis erytrocephala ( Fabricius, 1781) , the type species of the genus Deropeltis Burmeister, 1838 , and Afrostylopyga angolensis Anisyutkin, 2014 , the type species of the genus Afrostylopyga Anisyutkin, 2014 , ( Anisyutkin 2014).

Figures

FIGURE 3. Left phallomere of the male genitalia (holotypes): from above (A, E, I), outside (B, F, J), inside (C, G, K) and below (D, H); L—left phallomere from below, partly. A–D—Duchailluia ivindo sp. nov.; E–H—Distylopyga beccalonii sp. nov.; I–L—Neostylopyga yemenica (Bey-Bienko, 1969). Dotted areas shows membranous parts. Abbreviations: a.c.p., a.e.s., a.p., b.p., d.c.p., d.l., f.c.p., L2, L3, L4C, L4D, L4F, m.l., r.m.l., s.l., t.f., v.l.—see text. Scale bar 1 mm: a = A–D; b = E–H; c = I– L.

FIGURE 4. Distylopyga beccalonii Anisyutkin, sp. nov., male, holotype (A–K) and female, paratype (L–N). A, L—facial part of head; B—head, thorax and six abdominal tergites from above; C—left tegmen from side; D—left hind tarsus from outside; E—1st–4th segments of left hind tarsus from below; F—arolium and claws of left hind tarsus; G—abdominal apex from above, only bases of cerci are shown; H—right cercus from inside; I—hypandrium from below; J, K—caudal margin of hypandrium from above (J) and caudal (K); M—general view from above; N—genital plate from below. Dotted areas shows membranous parts. Dotted line in Fig. 4A, L delimits areas of ocellar spots. Abbreviations: I–X—1st–10th abdominal tergites respectively, a.s., par., pv.– see text. Scale bar 1 mm: a = A, L; b = B; c = C; d = D; e = E; f = F; g = G, H; i = J, K; j = M; k = N.

FIGURE 5. Distylopyga beccalonii Anisyutkin, sp. nov., male genitalia, holotype. A–C—right phallomere from above (A), below (B) and outside (C); D, E—ventral phallomere from below (D) and side (E). Dotted areas shows membranous parts. Abbreviations: a.p., a.t., R1G, R1Hi., R1Hout., R2, R3—see text. Scale bar 1 mm.

FIGURE 6. Neostylopyga yemenica (Bey-Bienko, 1969), male, holotype. A—facial part of head; B—head, thorax and 1–6th abdominal tergites from above; C—7th abdominal tergite from above; D—abdominal apex from above, cerci broken off; Ehypandrium from below, styli broken off. Dotted areas shows membranous parts. Abbreviations: I–VIII, X—1st–10th abdominal tergites respectively—see text. Scale bar 1 mm: a = A; b = B; c = C, D; d = E.

FIGURE 7. Neostylopyga yemenica (Bey-Bienko, 1969), male genitalia, holotype. A–C—right phallomere from above (A), below (B) and outside (C); D, E—ventral phallomere from below (D) and side (E). Dotted areas shows membranous parts. Abbreviations: a.t., c.out., R1G, R1H, R2, R3—see text. Scale bar 1 mm: a = A–C; b = D, E.