Lordiphosa denticeps
Creators: name: Katoh, Takehiro K.
name: Zhang, Guang
name: Toda, Masanori J.
name: Zhang, Wen-Xia
name: Gao, Jian-Jun
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Drosophilidae
Lordiphosa
Lordiphosa denticeps

description: Lordiphosa denticeps species group
Drosophila (Hirtodrosophila) denticeps species group, Okada, 1967: 3.
Lordiphosa denticeps species group: Zhang, 1993: 144; Fartyal et al., 2017: 51.
Diagnosis (slightly modified from Fartyal et al. 2017). Tarsomeres of male foreleg often with sex-combs (Figs 3– 11A,B, 13–15A,B), except for L. medogensis sp. nov. (Fig. 12A,B). Surstylus with numerous, recurved setae on ventral portion of inner surface, in addition to a row of prensisetae along caudal margin (Figs 3–11F,G, 13G,H, 14F,G, 15F,G), except for L. medogensis sp. nov. (Fig. 12F,G). Ventral margin of cercus tapering or truncated, fringed with a tuft of stout, black spines (Figs 3–11F, 13G, 14F, 15F), except for L. medogensis sp. nov. (Fig. 12F). Gonopods dorsally fused with each other, forming roof-shaped plate surrounding dorsal surface of aedeagus (Figs 3– 6I –K, 7H–J 8–12I –K, 13J–L, 14I –K, 15I –K). Aedeagus membranous at least partially, hirsute apically, dorsally fused to roof-shaped gonopods (Figs 3–6K, 7J, 8–11K, 13L, 14K, 15K), or completely fused to gonopods and ventrally entirely pubescent in L. medogensis sp. nov. (Fig. 12I –K). Oviscapt with numerous lateral ovisensilla scattered on mesal surface (Figs 4N, 5O, 7N, 8O, 9O, 10N, 11N, 12O).
Common characters (♂, ♀). Head (Pls 1–7): Eye red with dense interfacetal setulae. Frontal vitta anteriorly with several inclinate interfrontal setulae. Fronto-orbital plate with several small reclinate setulae slightly shorter than anterior reclinate orbital seta; anterior reclinate orbital seta situated between proclinate and posterior reclinate orbital setae. Ocellar setae inserted inside triangle made by ocelli. Facial carina slightly convex, narrow, short (undeveloped in L. medogensis sp. nov.). Subvibrissa almost indistinguishable from other oral setae. Supracervical setulae tapered, thin, apically more or less curved and sharp. Palpus apically with 1 prominent seta. Cibarium thickened on anterior margin; anterior end not dilated; anterolateral corners distinctly protruded anteriad; dorsal wall pear-shaped, with posterior portion oval; anterior sensilla 4, arranged in square; medial sensilla arranged in a pair of nearly parallel rows; sensilla campaniformia 2 pairs; posterior sensilla arranged in a pair of anteriorly divergent rows. Prementum pale, somewhat grayish, yellow (whitish yellow in L. anthophilia sp. nov.); ventral surface distally more or less swollen. Labellum with 5 (6 in L. medogensis sp. nov.) pseudotracheae per side.
Thorax (Pls 1, 2): Postpronotal lobe with 2 prominent, subequal setae. Dorsocentral setae nearly parallel or slightly convergent. Basal scutellar setae divergent, sometimes sinuate; apical scutellar setae cruciate.
Wing (Pls 1, 2) hyaline, long, slender; veins pale brown to brown; crossveins not clouded. C1 setae 2, subequal. R2+3 nearly straight; R4+5 and M1 nearly parallel. Halter entirely pale yellow, basally slightly grayish.
Legs (Pls 1, 2, Figs 3–15A,B) pale yellow to yellowish brown; distal tarsomeres darker. Apical seta present on fore and mid-tibiae (only mid-tibiae in L. anthophilia sp. nov.); preapical dorsal seta present on tibiae of all legs. Midleg 1 st tarsomere subproximally with 1 short, black spine (except for L. anthophilia sp. nov.). Hind-leg 1 st tarsomere longer than total length of 4 succeeding tarsomeres.
Abdomen (Pls 1, 2): Sternites pale yellow to pale grayish yellow.
Male terminalia (Figs 3C–L, 4C–L, 5C–M, 6C–L, 7C–L, 8C–M, 9C–M, 10C–L, 11C–L, 12C–M, 13C–M, 14C–L, 15C–L): Epandrium thickened in ventral lobe, with several long setae; caudoventral setae longer and thicker than others. Membrane between epandrium and cercus dorsally pubescent. Cercus separated from epandrium. Surstylus oblong, not fused but articulated to epandrium, with stout, black, apically sharp prensisetae. Tenth sternite medially concaved dorsad, forming arch just fitting dorsal shape of gonopods (broadly concaved, forming dome in L. kimurai sp. nov., but flat in L. anthophilia sp. nov.). Hypandrium with no paramedian setae but a pair of processes apically reaching to base of paramere, sometimes pubescent on caudolateral plates broadly fused to gonopods. Paramere long, strongly sclerotized, basally not fused but articulated to hypandrium. Aedeagal basal processes and aedeagal guide absent.
Female terminalia (Figs 4M–O, 5N–P, 7M–O, 8N–P, 9N–P, 10M–O, 11M–O, 12N–P): Membrane between tergite VIII and epiproct/hypoproct pubescent. Epiproct and hypoproct entirely pubescent. Sternite VII pale yellow to pale grayish yellow (dark brown in L. kimurai sp. nov.), deeply notched caudomedially, somewhat U-shaped, nearly entirely pubescent, caudally with several setae. Oviscapt valve orange brown, marginally with peg-like, apically more or less blunt ovisensilla, ventrally with 1 subterminal, inner, short, trichoid-like ovisensillum; inside of oviscapt with strongly sclerotized rod-shaped structure (not rod-shaped in L. medogensis sp. nov.). Spermathecal capsule blackish brown, strongly sclerotized, with introvert of duct.
Included species. The L. denticeps group comprises a total of 24 species (see the subsequent key), including nine new ones described in this paper. However, it does not include Lordiphosa nigrostyla (Okada, 1988) that was originally described as a member of the D. (H.) denticeps group at that time. This species was transferred to the Lordiphosa nigricolor species group, along with five other species that had been assigned to the D. (H.) denticeps group, when Okada (1990) synonymized the D. (H.) denticeps group with the D. (L.) nigricolor group. When Zhang (1993) resurrected the L. denticeps group, this species was not included as its member. Therefore, L. nigrostyla is regarded as still belonging to the L. nigricolor group. It is, however, still uncertain whether this species belongs to the L. nigricolor or the L. denticeps group and even to the genus Lordiphosa. Re-examination of the holotype (the single specimen available for L. nigrostyla) is needed to fix its taxonomical position in the light of current morphological studies on Lordiphosa (e.g., Hu & Toda 2001).
description: Published as part of Katoh, Takehiro K., Zhang, Guang, Toda, Masanori J., Zhang, Wen-Xia & Gao, Jian-Jun, 2018, The Lordiphosa denticeps species group (Diptera: Drosophilidae) in China, with redescriptions of four known species and descriptions of nine new species, pp. 37-75 in Zootaxa 4471 (1) on pages 41-42, DOI: 10.11646/zootaxa.4471.1.2, http://zenodo.org/record/1439521