Oxyscelio nullicarina Mo & Chen, 2020

Mo, Wen-Hui, Chen, Hua-Yan, Johnson, Norman F., Pang, Hong, Ma, Li & Liu, Jing-Xian, 2020, Revision of the genus Oxyscelio Kieffer (Hymenoptera, Scelionidae) from China, Zootaxa 4816 (3), pp. 251-310 : 298-301

Oxyscelio nullicarina Mo & Chen , sp. n.

http://zoobank.org/ 51A8DF2B-B68D-4EFD-AEFB-60D9F2A2AA8C

Figures 3 , 8 , 219–228

Description. Female. Body length 3.01–3.30 mm (n=6).

Radicle color: same color as scape. Scape color: yellowish. A4: broader than long. A5: broader than long. Antennal club in female: formed, segments compact.

Interantennal process: not elongate. Median longitudinal elevation in frontal depression: absent. Frontal depression: concave. Frontal depression sculpture: without transverse or oblique carinae below submedian carina. Submedian carina: strong, formed by a sharp raised carina. Submedian carina medially: without peak. Concavity across dorsal part of frontal depression: absent. Depression extending ventrally from median ocellus: absent. Upper frons: hood-like. Malar area near antennal foramen: without carina or expansion. Malar area at mouth corner: with radiating striae. Smooth strip along posterior side of malar sulcus: absent or not consistently broad. Middle genal carina: absent. Major sculpture of gena anteriorly: rugose; umbilicate-punctate. Major sculpture of gena posteriorly: absent; umbilicate-punctate. Microsculpture of gena anteroventrally: absent. Microsculpture of gena posteroventrally: absent. Median carina extending posteriorly from hyperoccipital carina: present. Hyperoccipital carina: complete, continuous with anterior genal carina. Lateral connection between hyperoccipital and occipital carinae: absent. Area between vertex and occipital carina: irregularly rugose. Occipital carina medially: uniformly rounded. Lateral corners of occipital carina: not protruding.

Lateral pronotal area: without bulge projecting towards anterior pit. Epomial corner: weak. Netrion surface anteriorly: not inflected. Mesoscutum anteriorly: steep. Mesoscutal median carina: present and complete. Longitudinal carina between median carina and notauli: absent. Major sculpture of medial mesoscutum anteriorly: umbilicate-punctate; rugose. Major sculpture of medial mesoscutum posteriorly: umbilicate-punctate; transversely rugose. Microsculpture of medial mesoscutum anteriorly: granulate. Microsculpture of medial mesoscutum posteriorly: absent. Major sculpture of mesoscutellum: umbilicate-foveate; longitudinally rugose. Microsculpture of mesoscutellum medially: absent. Microsculpture of mesoscutellum laterally: absent. Mesoscutellar apex: convex or straight. Setae along anterior limit of femoral depression: arising from rows of foveae. Number of carinae crossing speculum above femoral depression: 3. Number of carinae crossing femoral depression: more than 5. Mesepimeral sulcus pits: more than 5. Metascutellum dorsally: concave. Metascutellar sculpture dorsally: with scattered rugae. Median carina of metascutellum: absent. Metascutellar setae: with many dorsal setae. Metascutellar apex: weakly emarginate. Metapleuron above ventral metapleural area: crossed by carinae. Metasomal depression setae: absent. Lateral propodeal carinae anteromedially: strongly diverging. Anterior areoles of metasomal depression: absent. Anterior longitudinal carinae in metasomal depression: absent. Lateral propodeal areas: separated medially. Postmarginal vein: present. Fore wing apex: reaching beyond T6.

T1 midlobe: with 4 longitudinal carinae. T1: without anterior bulge. T2: with straight longitudinal striae or rugae. T6: broader than long. Apical flange of T6: exposed apically. Metasomal apex: rounded. Major sculpture of T6: umbilicate-punctate. Microsculpture of T6: absent.

Male. Body length 3.20–3.43 mm (n=3). A5 tyloid: carina-like, not expanded. A11: longer than broad. Median tooth of frontal depression: absent. Median lobe of T1: with 4 longitudinal carinae. Metasomal apex: with tiny rounded tubercles.

Diagnosis. Both sexes: Frons without elevation between antennal foramen and eye. Hyperoccipital carina present, continuous with anterior genal carina. Medial mesoscutum transversely rugose posteriorly. Metascutellum with dorsal setae. Female: A4, A5 broader than long. T1 with 4 longitudinal carinae. Male: A5 carina-like, not expanded. Frontal depression without tooth-like median protrusion dorsally. T1 midlobe with 4 longitudinal carinae. Apex of T7 with tiny rounded tubercles. Oxyscelio nullicarina is similar to O. convergens but can be distinguished by the setose metascutellum, and the broad A4 and A5 of female.

Etymology. The name nullicarina refers to the absence of middle genal carina of this species. The epithet is used as a noun in apposition.

Material Examined. Holotype, female: CHINA: Zhejiang, Mt. Gutianshan, 29°15’20”N 118°9’18”E, 18.VIII.2003, Zaifu Xu , SCAU 3015454 (deposited in SCAU) . Paratypes: (6 females, 3 males) CHINA : 1 female, Zhejiang, Mt. Gutianshan , 29°15’20”N 118°9’18’’E, 18.VIII.2003, Zaifu Xu, SCAU 3018700 ( SCAU) ; 2 females, Guangdong, Mt. Chebaling , 24°43’N 114°14’E, 21–23.VIII.2003, Jingxian Liu, SCAU 3015455 , 3018699 ( SCAU) ; 2 males, Hainan, Mt. Jianfengling , 18°41’N 108°49’E, 12–14.VII.2006, Jingxian Liu, SCAU 3015456 , 3018708 ( SCAU) ; 1 female, 1 male, Guangdong, Nanling National Nature Reserve , 9–18.VII.2004, Juanjuan Ma, SCAU 20095891 , 200905875 ( SCAU) ; 1 female, Zhejiang, Hangzhou, West Lake , 25.VIII.2003, Qiong Wu, SCAU 2011000651 ; 1 female, Zhejiang, Gutianshan , 3.VII.2005, Min Shi, SCAU 3040395 ( SCAU) .

Comments. Johnson et al. (2013) reported additional distribution records of Oxyscelio ceylonensis ( Dodd, 1920) from China. However, when we examined the two yellowish females and one blackish male identified as Oxyscelio ceylonensis ( Dodd, 1920) (deposited in SCAU), it turns out that these three specimens do not match any described species. Based on additional material collected from Zhejiang, Guangdong and Hainan, we describe them as a new species here.

Figures

FIGURES 1–4. Antenna 1–2 Antenna 1 Oxyscelio intermedietas Burks, female (SCAU 3013743) 2 Oxyscelio aclavae Burks, female (SCAU 3018681) 3–4 Fore wing 3 Oxyscelio nullicarina Mo & Chen, sp. n., paratype, female (SCAU 200905875), pmv: postmarginal vein 4 Oxyscelio paracuculli Mo & Chen, sp. n., holotype, female (SCAU 3040670).

FIGURES 5–10. Head 5 Oxyscelio aclavae Burks, female (SCAU 3018681), anterior view, of: oblique flange 6 Oxyscelio mesiodentis Burks, female (SCAU 3018688), anterior view, vc: vertical carina 7 Oxyscelio intermedietas Burks, female (SCAU 3013743), lateral view, mgc: middle genal carina 8 Oxyscelio nullicarina Mo & Chen, sp. n., paratype, female (SCAU 200905875), lateral view 9 Oxyscelio ogive Burks, female (SCAU 3040668), dorsal view, oc: occipital carina; lc: lateral corner 10 Oxyscelio doumao Burks, female (SCAU 3013741), dorsal view, oc: occipital carina; hoc: hyperoccipital carina.

FIGURES 219–224. Oxyscelio nullicarina Mo & Chen, sp. n., holotype, female (SCAU 3015454) 219 Dorsal habitus 220 Lateral habitus 221 Head and mesosoma, dorsal view 222 Head and mesosoma, lateral view 223 Head, anterior view 224 Metasoma, dorsal view.

FIGURES 225–228. Oxyscelio nullicarina Mo & Chen, sp. n., paratype, male (SCAU 3015456) 225 Dorsal habitus 226 Lateral habitus 227 Antenna 228 Metasomal apex, dorsal view.