Hemutilla Lelej, Tu et Chen

Tu, Bin-Bin, Lelej, Arkady S. & Chen, Xue-Xin, 2014, Review of the genus Cystomutilla André, 1896 (Hymenoptera: Mutillidae: Sphaeropthalminae: Sphaeropthalmini), with description of the new genus Hemutilla gen. nov. and four new species from China, Zootaxa 3889 (1), pp. 71-91 : 76-78

Hemutilla Lelej, Tu et Chen , gen. nov.

( Figs 4–13 )

Type species: Hemutilla granulata Tu, Lelej et Chen , sp. nov.

Diagnosis. MALE. Clypeus deeply concave, anterior border with median projection (weak to almost quadrangular), basally with median carina. Mesosternum midway to anterior margin mesally with paired high, apically acuminate lamellae. Mid and hind femora with setae more than 2 × maximum width of femur. First metasomal tergum 1.6–2.0 × as long as broad. Length of volsella 0.65 × or more of length of gonostylus. FEMALE. Clypeus posteriorly with strong V-shaped or thin transverse carina; anterior border without tubercles. Scutellar scale absent. Mesopleuron, metapleuron and propodeum laterally densely punctate. Metasternal posterior median process bifurcate. Metasomal sternum 1 with bifurcate carina.

Description. MALE. Eye subcircular, inner margin roughly convex, long axis vertical. Mandible apically with two (in H. tuberculata ) or three teeth, apically not expanded (in H. tuberculata ) or expanded; ventral basal tooth present, small (in H. tuberculata ) or enlarged and lamellate; dorsal carina slightly (in H. tuberculata ) or strongly curved. Clypeus deeply concave, anterior border with weak (in H. tuberculata ) to almost quadrangular median projection; basally with median carina. Flagellomere 1 distinctly shorter than flagellomere 2. Prementum with strong long narrow median or paired longitudinal carinae. Notaulus present but incomplete, longer than parapsidal furrow. Parapsidal furrow obvious posteriorly only, absent or scar anteriorly. Tegula small, scale-like, convex, smooth and shiny. Axillar posterolateral dorsal margin flangelike, apex strongly dentate. Scutellum medially evenly sculptured, without smooth line. Mesosternum anteromesal to mid coxa smoothly rounded; midway to anterior margin mesally with paired high apically acuminate lamellae. Metasternum posterior median process shorter than coxal height, tridentate, with median tooth incised. Propodeum dorsally with median longitudinal cell, carinate laterad. Fore wing with two submarginal and one discoidal cells. Crossvein cu-a of fore wing interstitial or postfurcal (in H. granulata ). Pterostigma elongate, broader than base or as narrow as base (in H. tuberculata ). Hind coxa mesally simple, weakly swollen anteriorly (in H. granulata ) or strongly dentate (in H. tuberculata ). Mid and hind femora with setae more than 2 × maximum width of femur. Some pubescence of metasomal tergum 1 and propodeum brachyplumose. Metasomal segment 1 petiolate, first tergum 1.6–2.0 × as long as broad. Metasomal tergum 2 basally constricted. Felt line on metasomal tergum 2 present laterally, well developed; on sternum 2 present laterally, distinct, minute or well developed (in H. tuberculata absent or dispersed). Hypopygium convex to flat or longitudinally concave, evenly sculptured, punctate to smooth. Volsella with tubercle-like paracuspis. Length of volsella 0.65 × or more length of gonostylus.

FEMALE. Head strongly developed behind eye, distance between posterior margin of eye and that of head almost twice eye diameter. Eye subcircular, inner margin roughly convex, long axis vertical. Clypeus posteriorly with strong V-shaped or thin transverse carina; anterior border without tubercles. Flagellomere 1 approximately equal in length to flagellomere 2. Scutellar scale absent. Mesopleuron, metapleuron and propodeum laterally densely punctate. Metasternal posterior median process longer than coxal height. Mid and hind tibiae with two rows of spines. Metasomal tergum 1 not constricted posteriorly, sessile and merging evenly with tergum 2; sternum 1 with bifurcate carina. Pygidial area elongate, narrow, carinate laterally, glabrous, shiny.

Distribution. Palaearctic and Oriental China (Henan, Hunan, Jiangxi, Shaanxi, Zhejiang, Fujian, Taiwan).

Species included. Six species: Hemutilla granulata Tu, Lelej et Chen , sp. nov., H. ferrugineipes Tu, Lelej et Chen , sp. nov., H. hoozana ( Zavattari, 1913) , comb. nov., H. tuberculata Tu, Lelej et Chen , sp. nov., H. bifurcat a ( Chen, 1957), comb. nov., and H. cheni Tu et Lelej , sp. nov.

Hosts. Unknown.

Remarks. In spite that all species of Hemutilla are currently known only from one sex (type species is known from male) we think that H. bifurcat a ( Chen, 1957) and H. cheni sp. nov. which are known from females belong to this genus by following: a) the genus Hemutilla is a single representative of the tribe Sphaeropthalmini in Oriental China (south of 30°N); b) both species of females are distributed in Oriental China where H. granulata sp. nov., H. ferrugineipes sp. nov., and H. hoozana ( Zavattari, 1913) which are known from males are also distributed ( Fig. 13 ); c) quite possible that H. bifurcat a ( Chen, 1957) and H. hoozana ( Zavattari, 1913) are the opposite sexes of the same species.

Etymology. The generic name is dedicated to Prof. He Junhua (Zhejiang University, Hangzhou, China), for his valuable contribution to the study of Hymenoptera in China; the second part - mutilla is derived from the generic name Mutilla .

Figures

FIGURE 4. Hemutilla granulata sp. nov., ♂, holotype. A. Hhabitus, lateral view, B. Head, dorsal view, C. Head, frontal view, D. Head, lateral view, E. Mesosoma, dorsal view. F. Fore and hind wings, G. Mesosoma, lateral view, H. Metasoma, dorsal view. Scale line = 0.5 mm.

FIGURE 5. Hemutilla ferrugineipes sp. nov., ♂, holotype. A. Habitus, lateral view, B. Head, dorsal view, C. Head, frontal view, D. Head, lateral view, E. Mesosoma, lateral view, F. Fore wing, G. Mesosoma, dorsal view, H. Metasoma, dorsal view. Scale line = 0.5 mm.

FIGURE 6. Hemutilla tuberculata sp. nov., ♂, holotype. A. Habitus, lateral view, B. Head, dorsal view, C. Head, frontal view, D. Head, lateral view, E. Mesosoma, dorsal view, F. Metasoma, dorsal view, G. Mesosoma, lateral view, H. Fore and hind wings. Scale line = 0.5 mm.

FIGURE 7. Mandible of males. A. Hemutilla ferrugineipes sp. nov., holotype. B. H. granulata sp. nov., holotype. C. H. tuberculata sp. nov., holotype. D. H. hoozana (Zavattari), China, Zhejiang. Scale line = 0.5 mm.

FIGURE 8. Clypeus of males. A. Hemutilla ferrugineipes sp. nov., holotype. B. H. granulata sp. nov., holotype. C. H. tuberculata sp. nov., holotype. D. H. hoozana (Zavattari), China, Zhejiang. Scale line = 0.5 mm.

FIGURE 9. Genitalia of males. A, B. Hemutilla granulata sp. nov., paratype. A. Dorsal view, B. Ventral view. C, D. H. ferrugineipes sp. nov., holotype. C. Dorsal view, D. Ventral view. Scale line = 0.5 mm.

FIGURE 10. Genitalia of males. A, B. Hemutilla. hoozana (Zavattari), China, Zhejiang. A. Dorsal view, B. Ventral view, C, D. H. tuberculata sp. nov., holotype. С. Dorsal view, В. Ventral view. Scale line = 0.5 mm.

FIGURE 11. Hemutilla cheni sp. nov., ♀, holotype. A. Habitus, lateral view, B. Mesosoma, dorsal view, C. Pygidium, D. Metasoma, lateral view, E. Head, dorsal view, F. Head, frontal view, G. Head, lateral view, H. Metasoma, dorsal view. Scale line = 0.5 mm.

FIGURE 12. Brachyplumose setae on propodeum posteriorly and metasomal tergum 1 basally. A. Hemutilla cheni sp. nov., ♀, holotype. B. H. bifurcata (Chen), ♀. C. H. tuberculata sp. nov., ♂, holotype. D. H. ferrugineipes sp. nov., ♂, holotype. Scale line = 0.5 mm.

FIGURE 13. Distribution map of six species of Hemutilla.