Odonaellus expansus, Hu & Cao & Xing, 2025

Odonaellus expansus sp. nov.

Figs 13–16 View Figures 13–16 , 17–20 View Figures 17–20 , 21–28 View Figures 21–28 , 29–34 View Figures 29–34

Description.

Color pattern of anterior dorsum and face as in Figs 13 View Figures 13–16 – 20 View Figures 17–20 . Male pronotum dark brown with irregular fuscous spots (Fig. 15 View Figures 13–16 ); female pronotum yellowish brown, without spot (Fig. 19 View Figures 17–20 ).

Other external features as in generic description.

Male genitalia. Male pygofer with one pair of sharp ventral processes arising caudally and a pair of tiny posteroventral process grown in dorsal inner surface (Figs 21 View Figures 21–28 , 22 View Figures 21–28 ). Valve large (Fig. 23 View Figures 21–28 ). Subgenital plate without macrosetae (Fig. 24 View Figures 21–28 ). Aedeagal shaft auricular and subapical inner margin with a few small dentae; gonopore subapical (Figs 26 View Figures 21–28 , 27 View Figures 21–28 ). Connective with arms shorter than stem (Fig. 25 View Figures 21–28 ). Style curved; apical apophysis stout and subapically concave. (Fig. 28 View Figures 21–28 ).

Female pygofer with ventroposterior margin sharply incurved (Fig. 29 View Figures 29–34 ). Female seventh sternum posterior margin concave, resulting in projection on both sides (Fig. 30 View Figures 29–34 ). First valvula of ovipositor slightly curved, attenuate to apex, with indistinct scale-like sculpture ventrally (Figs 31 View Figures 29–34 , 32 View Figures 29–34 ). Second valvula with small teeth near apex (Figs 33 View Figures 29–34 , 34 View Figures 29–34 ).

Measurement. Length (including tegmen): ♂, 5.4–5.7 mm; ♀, 5.8–6.5 mm.

Type material.

Holotype: • ♂, China: Guangxi Autonomous Region, Longzhou County, Nonggang ; 22°25'21"N, 106°97'27"E; 4 May 2014, coll. Qu Wu ( GUGC) ; paratypes: • 4 ♂♂ 5 ♀♀, Guangxi Autonomous Region, Longzhou County, Nonggang ; 22°49'97"N, 106°97'49"E; 8 May 2012, coll. Zhiwei Fan, Hu Li; • 3 ♂♂, Guangxi Autonomous Region, Longzhou County, Nonggang ; 22°52'66"N, 106°96'94"E; 4 May 2014, coll. Qu Wu ( GUGC ).

Etymology.

The new species name is Latin adjective expansus, “ expanded ”, which is in reference to the broadly expanded base of the aedeagal shaft.

Remarks.

This species agrees more closely with the subtribal diagnosis of Eremophlepsiina ( Zahniser and Dietrich 2013) than does the type species of the genus. Unlike O. serratus , O. expansus has the male valve nearly as long as wide, the pygofer process ventrally arising, and the subgenital plate lacking macrosetae as in other Eremophlepsiina .