Foenobethylus xinglongensis Wang & Chen, 2022

Li, Yang, Wang, Zheng, Chen, Hua-Yan & Luo, Shi-Xiao, 2022, Integrated taxonomy unveils three new species of Foenobethylus (Hymenoptera, Bethylidae) from China, Journal of Hymenoptera Research 89, pp. 89-108 : 89

Foenobethylus xinglongensis Wang & Chen sp. nov.

Figures 4 , 5

Diagnosis.

Male. Head rectangular and elongate (Fig. 4B ). Clypeus with median lobe obtuse rounded, median carina complete, reaching anterior clypeal margin, high, straight in lateral profile. Eye glabrous (Fig. 4B ). Frons almost polished (Fig. 4B ). Notaulus converging posteriorly, incomplete and shallow (Fig. 4C ). Metapostnotal median carina incomplete, posterior third absent. Declivity of propodeum transversely rugulose (Fig. 4D ). Metatrochanter without spine (Fig. 5F ). Metafemur with only one proximal acute spine in ventral midline, 0.19 × as long as metafemoral width, touching apical margin of metatrochanter (Fig. 5F ). Posterior hypopygeal margin strongly incurved, lateral lobe with conical protuberance (Fig. 5B ). Basivolsella large, 0.6 × as long as gonostipe, basal half about as wide as apical half, basal margin incurved (Fig. 5C, D ).

Description.

Male holotype. Body length 2.32 mm. Forewing length 1.67 mm. Colors. Head, mesosoma (but pronotum and propleura castaneous), metasoma castaneous; base of scape, flagellomeres, apex of mandible, all coxae, all trochanter, all femora, basal half of all tibiae and claws pale castaneous; apex of scape, pedicel, base of mandible, palpi, protibia, apical half of all tibiae and tarsi yellow; wings subhyaline.

Head. Head (Figs 4B , 5A ) rectangular and elongate, 1.2 × as long as wide. Mandible with five apical sharpened teeth, posterior tooth largest, middle three teeth smaller, anterior tooth smallest. Clypeus with median lobe obtuse rounded, median carina complete, reaching anterior clypeal margin, high, straight in lateral profile. Eye glabrous, almost touching mandible base at anterior corner. Malar space reduced. Frons very weakly coriaceous, almost polished, punctures very sparse and small. WH 0.86 × LH. WF 0.62 × WH. WF 1.35 × HE. OOL 1.19 × WOT. Frontal angle of ocellar triangle obtuse. Anterior ocellus far posterior to supra-ocular line. Temple divergent anterad, corner rounded. Vertex badly outcurved. First four antennomeres in ratio of about 35:15:14:13 (Fig. 4E ). All flagellomeres distinctly longer than wide, pubescence erect, about 0.63 × as long as flagellomeral width. Maxillary palpus with five palpomeres (Fig. 5A ). Labial palpus with two palpomeres (Fig. 5A ). Occipital carina complete. Medioccipito-genal carina complete. Hypostomal carina thick, almost straight, angled medially.

Mesosoma (Figs 4C, D , 5A ). Mostly polished and weakly coriaceous. Pronotal flange short, exposing propleuron dorsally. Dorsal pronotal area short, without anterior carina strongly progressively narrowing anterad, lateral surface concave. Notaulus converging posteriorly, incomplete, shallow, faint, but progressively more evident posteriorly. Parapsidal signum almost straight, absent anteriorly, but wide and deep posteriorly. Mesoscutellum slightly shorter than anteromesoscutum. Mesoscutum-mesoscutellar sulcus deep, arched, sides wider than middle. Metanotum conspicuous, metascutellum wide and short, metanotal trough trabeculate, metanotal fovea outlined. Metapectal-propodeal disc polished, metapostnotal median carina incomplete, absent posteriorly, lateral and transverse posterior carinae complete; propodeal spiracle circular, located on lateral surface of propodeum, ventral to lateral carina. Propodeal declivity transversely rugulose, without median carina. Mesopleuron with mesopleural pit large and well defined. Pleurosternum small, triangular, with vertex directed posterad. Prepectus with epicnemial medial projection complete, posterior prepectal flange thick. Wings (Fig. 4F ). Forewing with three closed cells (Costal, Radial and First Cubital); pterostigma about 0.24 × as wide as long, anterior board outcurved; 2r-rs&Rs sector vein long; Rs&M reaching Sc+R far from pterostigma. Hind wing with one straight hamulus, and four distal hamuli equally distant, and strongly curved. Legs. Profemur swollen, 2.4 × as long as wide, apical half of ventral margin serrulate. Metatrochanter (Fig. 5F ) without spine. Metafemur (Fig. 5F ) with only one proximal acute spine in ventral midline, 0.19 × as long as metafemoral width, touching apical margin of metatrochanter.

Metasoma. Weakly longer than mesosoma. Seventh sternite (Fig. 5E ) with posterior margin incurved at middle two fifths. Hypopygium (Fig. 5B ) with spiculum about as long as median length of hypopygium, and 1.5 × longer than anteromedial apodeme, latter slightly curved mesad apically; posterior margin strongly incurved, lateral lobe with conical protuberance. Genitalia (Fig. 5C, D ). Harpe shorter than gonostipe; aedeagus wide, 2.26 × as long as wide, apex aedeagus posterior to posterior margin of gonostipe, 0.6 × as long as gonostipe; basivolsella large, 0.6 × as long as gonostipe, basal half about as wide as apical half, basal margin incurved.

Variation.

Notauli are more well impressed; metapostnotal median carina slightly longer.

Etymology.

The specific epithet refers to the locality (Xinglong Tropical Botanical Garden) where the type specimens were collected.

Material examined.

Holotype, male, China: Hainan, Wangning, Xinglong Tropical Botanical Garden , 18°44'24"N, 110°11'38"E, 30.i-30.ii.2021, MT, Zheng Wang, SCAU 3042798 (deposited in SCBG) . Paratypes: 2 males. 1 male, China: Hainan, Wangning, Xinglong Tropical Botanical Garden , 18°43'52"N, 110°11'30"E, 18.vii-25.viii.2020, MT, Zheng Wang, SCAU 3042638 (SCBG); same data as holotype, but 9.vi-18.vii.2020, SCAU 3042656 (SCBG) .

Distribution.

Oriental region, China, Hainan Province.

Remarks.

This new species is very similar to F. sharkeyi Savergnini & Azevedo [Thailand], but can be separated from the latter by the following characters: frons almost polished (coriaceous in F. sharkeyi ); metapostnotal median carina incomplete, posterior third absent (complete in F. sharkeyi ); declivity of propodeum transversely rugulose (areolate-rugose in F. sharkeyi ); profemur 2.4 × as long as wide (1.2-1.3 × in F. sharkeyi ).

Figures

Figure 4. Foenobethylus xinglongensis Wang & Chen, sp. nov., male, holotype (SCAU 3042798) A lateral habitus B head, dorsal view C mesosoma, dorsal view D mesosoma, lateral view E antenna F wings.

Figure 5. Foenobethylus xinglongensis Wang & Chen, sp. nov., male, A, F holotype (SCAU 3042798), B-E paratype (SCAU 3042638). A head and mesosoma, ventral view B subgenital plate C genitalia, dorsal view D genitalia, ventral view E 7 th sternite F metaleg, lateral view.