Conjunctus decussatus Yao, Yu & Yang, sp. nov., is here designated.

The new genus is similar to Ishiharella Dworakowska, 1970, and Mahmoodia Dworakowska, 1970, in having the subgenital plates fused basally. The new genus is closely related to Ishiharella but can be distinguished by the following characters: (1) base of aedeagus slightly curved, lacking paired protuberances at the base of shaft (Fig. 2D, E, G); (2) aedeagal shaft with vertical tubular gonoduct, with gonopore opening positioned distinctly above inflated part of shaft (Fig. 2D, E, G) (vs. opening within inflated part of shaft in Ishiharella). The new genus differs from Mahmoodia in having very thick parameres and a penis lacking a large pre-atrium with appendages (Fig. 2D, F). The new genus is similar to Wolvletta Dworakowska, 1995, Theasca Dworakowska, 1972, and Radicafurcus Qin & Zhang, 2010, in having forewings with RP and MP′ connate basally and hindwings with an unbranched CuA vein (Fig. 1E, F). However, the new genus differs from Wolvletta by the presence of a laminar enlargement on the subterminal portion of the aedeagal shaft in lateral view and a distinctly unforked shaft apex (Fig. 2G). The new genus differs from Theasca by its very short, slender abdominal apodemes (Fig. 2A) and penis-bearing tuberculous subterminal appendages (Fig. 2D, E). Finally, the new genus can be distinguished from Radicafurcus by the aedeagus, which bears a ventral apodeme and remains unbranched in its ventral third (Fig. 2D, G).

Head. Crown with anterior margin obtusely rounded, posterior margin distinctly concave, nearly parallel in dorsal aspect. Vertex with median depression widening posteriorly (Fig. 1A, D). Crown about 0.4 times interocular width, distinctly shorter than median length of pronotum; maximum crown width narrower than pronotum width (Fig. 1A, D). Ocelli on vertex, far from compound eyes (Fig. 1B, C). Coronal suture absent. Face broad, length about twice that of crown; frontoclypeal area distinctly elevated (Fig. 1B, C).

Thorax. Pronotum with anterior margin broadly arcuate, posterior margin concave, lateral margins with lambda-shaped depressions (Fig. 1A, D). Forewing with RP and MP′ connate basally, forming a triangular third apical cell; three apical veins arising from m cell; m cell slightly longer, about 4 times wider than r cell (Fig. 1E). Hindwing with CuA vein unbranched (Fig. 1F).

Abdomen. Ventral abdominal apodemes weakly developed (Fig. 2A). Pygofer well-developed, with posterior margin folded ventrally, apex with minute setae, bearing ventral pygofer appendage (Fig. 2B, C). Subgenital plates united basally to valve; macrosetae present, marginal setae lateral to macrosetae (Fig. 2I). Paramere thick, short; apex with rolled folds, sub-terminal part with setae (Fig. 2D, F). Aedeagus shaft slightly curved at base in lateral view; subterminal portion with protrusion and laminar enlargement (Fig. 2G). Aedeagus shaft sclerotised, with vertical tubular gonoduct in dorsal view; gonopore opening distinctly above protrusion and inflated part of shaft (Fig. 2D, E, G). Anal tube process developed (Fig. 2J). Connective broad at base, narrowed distally (Fig. 2D, E, G).

The single known species of the genus occurs in Oriental parts of China.

The generic name refers to the fusion of the subgenital plates at their basal articulation, a diagnostic character for the genus. Gender: masculine.

Holotype: ♂, China: Chongqing, Chengkou, 5 July 2008, leg. Yang Zaihua. Paratype: 1 ♂, same data as holotype.

Description of male. Body length (n = 2): 4.6–4.9 mm.

Head. Crown orange-red, with a large, black pentagonal spot at posterior margin and vertex (Fig. 1A, D). Eyes black, ocelli brown, on vertex (Fig. 1B, C). Face light yellowish-brown (Fig. 1B, C).

Thorax. Pronotum with trapezoidal transverse depression; median and posterior portions reddish-brown, elevated (Fig. 1A, D). Scutellum light brown, intershield grooves brown, not reaching lateral margins (Fig. 1A, D). Forewings light brown; hindwings hyaline, veins brown (Fig. 1E, F). Abdomen dark brown. Legs light yellow; claws and tibiae of fore-legs brown (Fig. 1B).

Abdomen. Tergites dark brown. Ventral abdominal apodemes short, fine, extending to third abdominal segment (Fig. 2A). Pygofer broad basally in dorsal view, apex with fine setae; dorsal bridge exceeding one third of pygofer length. Posterior margin of lateral valve of pygofer involute (Fig. 2B, C). Ventral appendage crossed, narrowed distally (Fig. 2H). Subgenital plates exceeding pygofer, fused basally, with a single row of macrosetae sub-basally to tip; numerous macrosetae with marginal setae laterally (Fig. 2I). Paramere broad, with subterminally fine setae, apex tipped with rolled folds. (Fig. 2D, F). Aedeagal shaft enlarged distally in lateral view, with tuberculate dorsal protuberance and tubular gonoduct; the gonopore positioned above aedeagal shaft and dorsal protuberance (Fig. 2D, E, G). Anal styli elongated, straight, tapering to sharp apex, with short basal prickle (Fig. 2J). Connective triangular, broad basally, narrow distally, fused to base of aedeagal shaft below curvature (Fig. 2D, E).

Female. Unknown.

China, Chongqing.

The name of the new species is the Latin adjective decussatus, -a, -um, meaning “decussated, crossed”, referring to the crossed ventral pygofer appendages of the male.

Inflatopina intonsa Lu, Dietrich & Qin, 2017.

The genus currently comprises 10 species (including the one described in this paper), distributed in the Oriental and Palaearctic Regions. The included species are listed and keyed below.

Holotype: ♂, China: Guizhou, Kuankuoshui, 11 August 2010, leg. Dai Renhuai. Paratypes: 5 ♂♂, same data as holotype; 4 ♂♂, as holotype, but leg. Li Yujian; 6 ♂♂, Guizhou, Kuankuoshui, 14 August 2010, leg. Yu Xiaofei; 1 ♂, Sichuan, Lamahe, 26 July 2012, leg. Fan Zhihua.

The new species is similar to I. chiasmatica (Yu & Yang, 2014), I. paravictor Xu, Lu, Dietrich & Qin, 2019 and I. longistria Xu, Lu, Dietrich & Qin, 2019 in having a well-developed aedeagal pre-atrium, with atrium bearing paired protuberances and aedeagus lacking dorsal apodeme with tubular shaft (Fig. 4E–G). The new species differs from I. chiasmatica (Yu & Yang, 2014) in the following characters: male abdominal apodemes reaching the sixth abdominal segment (Fig. 4A), ventral pygofer appendage not exceeding pygofer (Fig. 4B, C) and enlarged portion of aedeagus spanning approximately half its total length (Fig. 4E–G). It differs from I. paravictor Xu, Lu, Dietrich & Qin, 2019, in having dorsal bridge of the pygofer occupying almost one-fourth the length of the lobe (Fig. 4B, C), aedeagal atrium bearing pair of processes with equal length shorter than shaft (Fig. 4F), and connective trapezoidal (Fig. 4E). Finally, it differs from I. longistria Xu, Lu, Dietrich & Qin, 2019, by the following characters: frontoclypeus brown laterally, with an irregular longitudinal yellow median stripe (Fig. 3C); subgenital plate with 49 marginal setae (Fig. 4J); and aedeagus lacking four small teeth along ventral margin (Fig. 4F).

Body length (n = 17): 5.0–5.2 mm. Body stout (Fig. 3A–F).

Head. Length of crown subequal to interocular width, shorter than median length of pronotum (Fig. 3A, D). Vertex smoky yellow (Fig. 3A, D). Ocelli yellow on anterior margin of vertex; eyes black (Fig. 3A, D). Coronal suture brown, reaching near anterior crown margin (Fig. 3A, D). Face broad; anteclypeus elevated medially; frontoclypeus and anteclypeus brown, with median yellow longitudinal oblong marking, remainder yellow (Fig. 3B, C).

Thorax. Pronotum broad, anterior margin arcuate, anterior portion with irregular spots, posterior margin with light brown horns on both sides (Fig. 3A, D). Mesoscutellum yellow, intershield grooves brown, posterior angle black (Fig. 3A, D). Forewing outer margin with light brown markings; RP and MP′ veins fused basally, both originating from r cell; r cell longer than m cell, m cell wider than r cell and c cell (Fig. 3E). Hindwing with CuA branched, branching point beyond intersection of CuA and MP′′ (Fig. 3F). Prothoracic tibiae and claws brown, remainder of legs yellow (Fig. 3B).

Abdomen. Abdominal apodemes broad, parallel, extending to sixth abdominal segment (Fig. 4A). Pygofer with peltate posterior margin bearing fine setae; dorsal bridge about one-fourth lobe length. Ventral appendage not exceeding pygofer, with numerous fine bristles to subterminal part (Fig. 4B, C). Subgenital plates with 4–6 basal setae, 49–51 marginal setae, 32–34 macrosetae and 38–40 long, fine setae, terminal half dorsally curved (Fig. 4J). Paramere elongate, curved, terminal half with irregular margins, proximal portion with setae, terminally with few teeth (Fig. 4E, H). Aedeagus without dorsal apodeme, pre-atrium well developed; atrium with a single pair of processes not exceeding shaft apex (Fig. 4E, G). Anal styli thick, apex irregular with small, fine projections (Fig. 4I). Connective nearly trapezoidal, with distinct median depression dorsally (Fig. 4E).

Female. Unknown.

China (Guizhou, Sichuan).

The name of the new species is the Latin adjective “pilosus, -a, -um”, meaning “hairy, pilose”, referring to the fine bristles on the ventral projection of the caudal segment.

The new species runs to I. longistria (in couplet 3) in the identification key provided by Xu et al. (2019), owing to the presence of paired ventrobasal processes on the aedeagus that are branched at their bases and a glabrous (not pubescent) ventral pygofer appendage. The following modification of the key enables separation of the two species: