Strongylophthalmyia elongata, Zhou & Evenhuis & Yang, 2024

Zhou, Jiale, Evenhuis, Neal L. & Yang, Ding, 2024, Taxonomic review of the Strongylophthalmyia ustulata group (Diptera: Brachycera: Strongylophthalmyiidae) from China, with the descriptions of three new species, Zootaxa 5403 (5), pp. 530-548 : 532-536

publication ID	https://doi.org/ 10.11646/zootaxa.5403.5.2
publication LSID	lsid:zoobank.org:pub:6BC79A0E-45A6-4685-AAD0-5B3133F098B4
DOI	https://doi.org/10.5281/zenodo.10562317
persistent identifier	https://treatment.plazi.org/id/266487E3-FFAE-4A0C-FF2A-18BDFA8AB720
treatment provided by	Plazi
scientific name	Strongylophthalmyia elongata
status	sp. nov.

Treatment

Strongylophthalmyia elongata sp. nov.

( Figs 3–8 View FIGURES 3–4 View FIGURES 5–8 , 26 View FIGURES 26–29 , 30 View FIGURES 30–33 )

Type material. Holotype. CHINA: ♂, Yunnan, Yulong, Mingyin, Jiazi , 2818 m, 17 Jun. 2020, Zhuo Chen leg. ( CAU) . Paratypes. CHINA: 1♂ 2♀♀, Yunnan, Yulong, Baisha, Wenhai , 3099 m, 16 Jun. 2020, Zhuo Chen leg. ( CAU) . 1♂, Yunnan, Yulong, Baisha, Geleba , 3005 m, 16 Jun. 2020, Weidong Huang leg. ( CAU) . 1♂ 1♀, Yunnan, Shangri-la, Hongshan Forest Farm, 3279 m, 11 Jun. 2012, Yuyu Wang leg. ( CAU) .

Diagnosis. Generally shining blackish brown ( Figs 3, 4 View FIGURES 3–4 ); face yellowish brown, parafacial yellow; antennal arista blackish brown ( Fig. 26 View FIGURES 26–29 ); wing slightly infumate, with large dark patch at apex and broad median transverse band, both much darkened in cell r 2+3 ( Fig. 30 View FIGURES 30–33 ); legs mostly yellow, with mid and hind femora dark brown apically, basal third of mid and hind tibiae dark brown; phallapodeme curved inwardly in apical half ( Fig. 8 View FIGURES 5–8 ); distiphallus about 1.73 times as long as phallapodeme, with hook-like sclerotized apical “glans” ( Figs 7, 8 View FIGURES 5–8 ).

Description. Male ( Fig. 3 View FIGURES 3–4 ) and female ( Fig. 4 View FIGURES 3–4 ). Body length 4.5–5.6 mm, wing length 4.1–4.6 mm.

Generally shining blackish brown ( Figs 3, 4 View FIGURES 3–4 ). Face yellowish brown; parafacial yellow. Antenna yellow with arista blackish brown ( Fig. 26 View FIGURES 26–29 ). Clypeus whitish in male, dark brown in female; proboscis and palpus blackish brown. Basisternum dark brown. Wing slightly infumate, with large dark patch at apex and broad median transverse band at level of dm-m, both much darkened in cell r 2+3 ( Fig. 30 View FIGURES 30–33 ); wing veins brown to dark brown. Halter white. Legs mostly yellow; mid and hind femora dark brown apically (indistinct on fore femur); basal third of mid and hind tibiae dark brown; tarsomeres 1–3 dark yellow, tarsomeres 4 and 5 dark brown ( Figs 3, 4 View FIGURES 3–4 ).

Head with frons slightly inflated; parafacial with dense silvery tomentose stripe; gena with silvery tomentose stripe along eye margin; postgena bulging, with several long black setulae. Head chaetotaxy: 1 inner vertical seta, 1 outer vertical seta, 2 fronto-orbital setae, 1 ocellar seta, 1 postocellar seta. Clypeus band-like in male, thick and anteriorly protruding in female; palpus elongate, with dense, short and long, dark setulae. Antennal scape with scattered marginal setae and 1 dominant dorsal seta; pedicel with single strong seta dorsally; first flagellomere ovate, wider than long, densely covered with short white setulae ( Fig. 26 View FIGURES 26–29 ).

Thorax elongate; mesonotum covered with scattered short golden setulae, in dorsal view with distinct transverse suture. Anepisternum with short setulae on posterior half. Scutellum subtriangular, slightly inflated. Thoracic chaetotaxy: 1 postpronotal seta, 1 anepisternal seta, 1 notopleural seta, 1 dorsocentral seta, 1 posterior supra-alar seta, 1 scutellar seta. Wing ( Fig. 30 View FIGURES 30–33 ) with R 4+5 and M 1+2 almost parallel apically; apical section of M 1+2 slightly arched; M 4 and CuA+CuP not reaching but closely approaching wing margin; r-m located about basal 0.41 of cell dm; apical section of M 4 much shorter than dm-m; alula small; anal lobe slightly narrowed. Legs with dense dark setulae; fore coxa with several short and long setulae anterodorsally.

Abdomen covered with dense long setae. Tergite 1 weakly sclerotized. Pregenital sclerites relatively weakly sclerotized.

Male genitalia: Epandrium ( Figs 5, 6 View FIGURES 5–8 ) relatively long and narrow, with dense long setae. Surstylus ( Figs 5, 6 View FIGURES 5–8 ) broadly expanded apically, with dense short stout setae on inner distal surface. Cerci ( Figs 5, 6 View FIGURES 5–8 ) narrow basally, rounded apically, with one long seta and several short setae in apical half. Hypandrium ( Figs 7, 8 View FIGURES 5–8 ) narrow, with one pair of bifid anterior lobes. Phallapodeme ( Fig. 8 View FIGURES 5–8 ) long, curved inwardly in apical half. Pregonite ( Figs 7, 8 View FIGURES 5–8 ) long, narrow, band-like, basally fused to inner surface of hypandrium. Phallic plate ( Figs 7, 8 View FIGURES 5–8 ) thickened, divided into two articulating sclerites. Distiphallus ( Figs 7, 8 View FIGURES 5–8 ) extremely long, about 1.73 times as long as phallapodeme, with sclerotized hook-like apical “glans”, membrane microtrichose. Ejaculatory apodeme long, thickened in basal half and slender in apical half.

Etymology. The specific epithet is derived from Latin elongata , referring to the relatively elongate body shape of this new species.

Distribution. China (Yunnan).

Comparative notes. Strongylophthalmyia elongata sp. nov. is similar to S. angusticollis Frey, 1956 ( Myanmar, Vietnam) in the elongate body shape. The syntypes of the latter species deposited in MZH, including a male and two females, were examined during the present study. The new species can be distinguished from S. angusticollis by the following character states: frons uniformly blackish brown (yellow in anterior quarter or third in S. angusticollis ); antennal arista blackish brown (yellowish brown in S. angusticollis ); basisternum dark brown (vs. yellow or with paired yellow spots in S. angusticollis ); apical spot and median transverse band on wing much darkened in cell r 2+3 (such patterns uniform in color in S. angusticollis ). The male genitalia of S. angusticollis have not been studied in detail. The difference in male genital characters between these two species needs to be checked in the future.