Gurneya rothi, Leonid N. Anisyutkin, 2016

Leonid N. Anisyutkin, 2016, New and little known Epilamprinae (Dictyoptera: Blaberidae) from the collections of the Muséum d’histoire naturelle de Genève and the Zoological Institute RAS, Saint Petersburg. Part 2, Revue suisse de Zoologie 123 (1), pp. 139-152 : 148

Gurneya rothi sp. nov.

Figs 59-70

Etymology: The species is named in honor of Dr. Louis Roth, famous specialist in cockroach taxonomy.

Material examined: Holotype; ZIN; male; Brazil, “Bahia”, “ Pinaconota bifasciata Sauss. ”, “R. Shelford det.”, genital complex in prep. 120815 /01.

Description of male (holotype): General colour dirty yellowish; epicranium and two proximal antennal segments brownish; eyes grey; antennae, with exception of two proximal segments, grey, yellowish toward apex; maxillary and labial palps, tegmina in about distal half, wings and abdomen yellow; pronotum with 2 black stripes ( Fig. 60 ). Surfaces smooth and lustrous, distal parts of antennae (approximately from 7-8th segments) dull; head ( Fig. 59 ), pronotum and tegmina in about proximal third with deep punctuation. Head about as long as wide ( Fig. 59 ); ocellar spots absent; facial part globular, with weak semicircular plate between eyes; distance between eyes 0.8 times eye length; distance between antennal sockets about 1.7 times scape length (0.9 mm); approximate length ratio of 3rd-5th segments of maxillary palps 1.5: 1.0: 1.3. Pronotum widely rounded anteriorly with weakly angulate caudal margin ( Fig. 60 ). Tegmina and wings completely developed, surpassing abdominal apex. Tegmina with rounded apex; venation subobsolete in proximal fourth, distinct in distal half; costal field long and narrow with obsolete venation; Sc thickened (well visible on ventral side of tegmen); R, M and CuA stems not separated basally; CuP distinct. Wings membranous, Sc in length as half as wing; RA with 5-6 not incrassated anterior veins; RS with 6 veins; M long and simple; CuA pectinate with 3 complete (reaching to wing margin) veins; behind CuA a long and simple vein, probably corresponding to 1st plical vein sensu Rehn (1951) or CuP [probably CuP + A1 sensu Bey-Bienko (1950)]; next long and simple vein probably corresponds to 3rd plical vein sensu Rehn (1951); between 1st and 3rd plical veins located shorter vein not reaching wing margin, probably corresponds to 2nd plical vein sensu Rehn (1951); anal fan consisting of 11 veins reaching margin of wing; 2 possibly jugal veins situated behind anal fan. Fore tibiae not thickened distally. Anterior margin of fore femora of armed type A, with 25-27 bimarginally serrated spines and 1 not bimarginally serrated apical one. Tibial spines well developed. Structure of hind tarsi: metatarsus shorter than other tarsal segments combined, with euplantula more than one half segment length; euplantulae of 2nd-4th segments large; tarsal spines completely absent, replaced with irregularly placed bristles; claws symmetrical and simple; arolium longer than half of claw length. Abdomen without visible glandular specializations. Anal plate (tergite X) trapezoidal in shape, caudal margin rounded, without medial incision ( Figs 61, 62 ). Cerci with distinct segments. Paraprocts of blaberid-type ( Fig. 62 , par.). Hypandrium asymmetrical and transverse, caudally rounded; left stylus cylindrical, right stylus broken off ( Fig. 63 ).

Genitalia ( Figs 64-70 ): Right phallomere (R+N): sclerite R1T with caudal part wide ( Figs 64, 65 , c.p.R1T); bristles absent; R2 long and sinuate; R3 crescentic, closely associated with R1T; R4 absent; R5 replaced with unsclerotized lobe. Cranial and above right phallomere situated small rounded sclerite of unclear homology ( Fig. 64 , r.scl.). Sclerite L2D (L1) not divided into basal and apical parts ( Fig. 66 ), slightly bent cranially, with “bent outgrowth” at caudal end ( Figs 67, 68 , b.o.); “apical sclerite” absent, membranous lobe surrounding caudal part of L2D without discernible bristles or sclerites ( Figs 67, 68 ). Sclerite L3 (L2d) with distinct basal subsclerite ( Figs 69, 70 , b.L3), “folded structure” and bristles ( Figs 69, 70 , f.s.); groove hge present. Sclerite L4U (L3d) weakly sclerotized, triangular in shape.

Females: unknown.

Measurements (in mm): Head length 2.9, head width 2.9; pronotum length 3.8, pronotum width 5.5; tegmen length 15.5, tegmen width 5.0.

Comparison: Gurneya rothi sp. nov. shares the peculiar structure of armament of the anterior margin of the fore femora (i.e., bimarginally serrated spines) with G. obliqua ( Walker, 1869) , the type and only known species of the genus, and Alphelixia sicca ( Walker, 1869) . The presence of bimarginally serrated spines readily differentiates these species from all other known epilamprines. The new species differs from G. obliqua in less expressed dark stripes on the pronotum (compare Fig. 60 and figs 33, 35 in Roth, 1974), the presence of apical spine on the anterior margin of fore femora and the truncated caudal margin of anal plate (compare Fig. 61 and fig. 38 in Roth, 1974). Gurneya rothi

Figures

Figs 59 - 70. Gurneya rothi sp. nov., male, holotype. (59) Facial part of head. (60) Pronotum, dorsal view. (61) Abdominal apex, dorsal view. (62) The same, ventral view. (63) Hypandrium, ventral view. (64) Right phallomere, dorsal view. (65) The same, ventral view. (66) Sclerite L 2 D, dorsal view. (67) Caudal part of sclerite L 2 D, seen from outside. (68) The same, dorsal view. (69, 70) Apex of sclerite L 3. Dotted areas show dark colour (60) or membranous parts (62 - 70). Abbreviations: b. L 3, b. o., c. p. R 1 T, f. s., par., r. scl., R 2, R 3, R 5 - see chapter “ abbreviation used in figures ”, for details see text. Scale bars 1 mm: a = 59, b = 60, c = 61, d = 62, e = 63, f = 64, 65, g = 66, h = 67, 68, i = 69, 70.