Marshiella yifangia Li, 2021

Li, Jun, Achterberg, Cornelis Van, Zheng, Min-Lin & Chen, Jia-Hua, 2021, Note on the heart-shaped modified basal antenna in the genus Marshiella Shaw (Hymenoptera: Braconidae: Euphorinae), with description of a new species, Zootaxa 4938 (4), pp. 497-500 : 497-498

Marshiella yifangia Li , sp. nov.

Figs 1–11

Type material. Holotype, ♀, C China, Hubei Province, Chaoriwan, Shennongjia, 27.vii.1988, Jianquan Yang . Paratype: 1♀, same label data as holotype except 28.vii.1988 .

Description. Holotype, ♀, length of fore wing 1.9 mm, and of body 2.4 mm.

Head. Antenna with 20 antennomeres and 0.7 × as long as fore wing, 0.6 × as long as body, first to fourth flagellomeres flatted, heart-shaped in dorsal view ( Fig. 3 ), densely setose ( Fig. 2 ), first flagellomere 1.5 × as long as second flagellomere, first, second and penultimate flagellomere 3.5, 2.1 and 1.3× as long as wide, respectively ( Fig. 2 ), fifth flagellomere 1.2× as long as fourth flagellomere ( Fig. 2 ); eye 2.4 × as long as temple in dorsal view; temples roundly narrowed behind eyes ( Fig. 4 ); ocelli small, OOL:OD:POL = 5:1:3 ( Fig. 4 ); frons broadly raised medio-longitudinally, vertex and frons largely rugulose ( Fig. 4 ); occipital carina complete ( Fig. 4 ); face nearly 1.6 × wider than high, granulate, nearly smooth ( Fig. 5 ); clypeus smooth, narrower than face, strongly convex medially, 1.2× as wide as high ( Fig. 5 ); dorsal margin of clypeus above level of ventral margin of eye anterior ( Fig.5 ); tentorial pits small ( Fig. 5 ); malar suture short, length of malar space 0.7 × basal width of mandible ( Fig. 5 ); mandibles stout ( Fig. 5 ). Mesosoma. Length of mesosoma 1.4× its high ( Fig. 7 ); side of pronotum crenulated anteriorly and medially, largely smooth ( Fig. 7 ); propleuron slightly striate ( Fig.7 ); mesopleuron ventrally largely smooth ( Fig. 7 ); prepectal carina largely present, absent medio-ventrally ( Fig. 7 ); episternal scrobe short and wide ( Fig. 7 ); precoxal sulcus long, irregularly rugose and crenulate ( Fig. 7 ); mesonotum moderately sparsely setose, flat, punctate anteriorly and largely smooth ( Fig. 6 ); notauli wide, finely crenulated, mesoscutum sparsely setose, flattened ( Fig. 6 ); scutellar sulcus slightly crenulate with one distinct crenula ( Fig. 6 ); scutellum flat, smooth ( Fig. 6 ); metapleuron rugose punctate or smooth ( Fig. 7 ); propodeum irregularly carinate with rugae in between, basally rugae weaker, posterior face vertical to dorsal face, medially slightly longitudinally concave ( Fig. 9 ). Wings. Fore wing ( Fig. 8 ): 1-SR+M absent; 1-R1 0.4 × as long as pterostigma; SR1+3-SR strongly curved; r:2-SR = 1:6; vein r issued from middle of pterostigma; vein m-cu slightly postfurcal; vein cu-a postfurcal; basal and subbasal cells of fore wing similarly setose as other cells. Legs. Fore leg: tibia 4.4× as long as coxa, 1.6× as long as femur; middle leg: tibia 6.2× as long as coxa, 1.2× as long as femur; hind leg: tibia 3.2× as long as coxa, 1.2× as long as femur; hind coxa smooth, 1.5× as long as wide ( Fig. 10 ). Metasoma. First tergite 2.4× longer than its maximum width, apical width 2.8× as long as its minimum width, with small spiracular tubercles in front of middle, without dorsope and laterope ( Fig. 10 ); first tergite rugose in front of spiracular tubercles, remainder of first tergite longitudinally striate ( Fig. 10 ); remaining segments smooth, compressed and shiny; ovipositor longer than half of metasoma, apically strongly curved ( Fig. 1 ). Colour. Yellowish-brown to dark brown; palpi yellow; scutellum, metanotum, propodeum yellowish-brown; wing membrane hyaline, pterostigma brown, veins brownish to pale brown; antenna dark brown, but its basal six segments yellow; legs brownish yellow; metasoma dark brown.

Paratype. Length of fore wing 1.8 mm; antenna with 21 antennomeres.

Remarks. This new species can be distinguished from related species by its unique bicoloured antenna. It is similar to M. binaries Chen and van Achterberg from South China, but differs from it as follows:1. scutellar sulcus with one crenula (scutellar sulcus with three crenulae); 2. antenna with 20–21 antennomeres, first flagellomere 1.5 × as long as second flagellomere, fifth flagellomere longer than fourth flagellomere (antenna with 19 antennomeres, first flagellomere 1.1 × as long as second flagellomere, fifth flagellomere shorter than fourth flagellomere); 3. pterostigma of fore wing wider, 1-R1 0.4 × as long as pterostigma, vein r issued from middle of pterostigma (pterostigma of fore wing slenderer, 1-R1 0.3 × as long as pterostigma, vein r issued from behind middle of pterostigma); 4. clypeus 1.2× as wide as high (clypeus 2.1× as wide as high); 5. notauli wide (notauli narrow).

Biology. Unknown.

Distribution. China (Palaearctic).

Etymology. Named in honour of Yifang Huang, the wife of first author, for her support.

Figures

FIGURES 1–8. Marshiella yifangis sp. nov., ♀, holotype. 1. Habitus, lateral aspect; 2. Antenna; 3. Basal flagellomeres; 4. Head, dorsal aspect; 5. Head, anterior aspect; 6. Mesosoma, dorsal aspect; 7. Mesosoma, lateral aspect; 8. Fore wing;

FIGURES 9–11. Marshiella yifangis sp. nov., ♀, holotype (but 11 of paratype). 9. Propodeum, dorsal aspect; 10. First metasomal tergite, dorsal aspect; 11. Habitus, lateral aspect.