Gryon fulvicoxa Komeda & Mita, 2020

Komeda, Yoto, Mita, Toshiharu, Hirose, Yoshimi & Yamagishi, Kenzo, 2020, Taxonomic revision of charon -, floridanum - and muscaeforme - groups of Gryon Haliday, 1833 (Hymenoptera, Scelionidae) from Japan, with descriptions of two new species and host information, Journal of Hymenoptera Research 80, pp. 99-135 : 99

Gryon fulvicoxa Komeda & Mita sp. nov.

Figs 1A , 2A , 3A , 4A , 5A, G , 6A

Diagnosis.

Frontal depression transversely costate by strong irregular carinae. Horizontal portion of occipital carina straight, short, reaching longitudinal extension line of outer margin of lateral ocelli. Legs entirely yellow.

Description.

Female. Length = 1.1-1.3 mm.

Color (Figs 1A , 2A ). Body mainly dark brown-black. A2-6, forecoxa brown. A1, mandibles, and legs (including mid and hind coxae) yellow.

Head. FCI = 1.20-1.33; LCI = 1.48-1.64; DCI = 1.86-2.05; HW/IOS = 1.76-1.83; head about 1.3 times as wide as mesosoma. (HW/TSL = 1.25-1.34). Frons (Fig. 3A ) reticulate with setae; central carina present ventrally; frontal depression weakly developed, transversely costate by strong irregular carinae. Vertex reticulate with setae; interocellar space reticulate; hyperoccipital carina absent; POL 3.1 times as long as OOL (POL/OOL = 2.84-3.32); OOL half times as long as LOL (OOL/LOL = 0.48-0.63). Clypeus rectangular, with rounded corners. Gena coriaceous with setae; medial genal carina absent. Occiput (Fig. 4A ) transversely costate with setae; occipital carina complete; angular point of occipital carina developed; horizontal portion of occipital carina straight, short, reaching longitudinal extension line of outer margin of lateral ocelli; postoccipital carina discontinuity present; postgena weakly costate along postoccipital carina; postgenal sulcus curved toward hypostoma; postgenal bridge smooth, weakly longitudinally costate beside median sulcus. Antennae (Fig. 5A ) clavate; A1 about 3.2 times longer than radicle, as long as clava; clava with five segments; claval sensilla formula A8-12/2-2-2-2-1; claval length about 3.7 times longer than width. Mandible thin, tridentate, anterior tooth longer than other teeth.

Mesosoma. Cervical pronotal area granulate with dense setae; epomial carina strongly present, not reaching dorsal edge; pronotal suprahumeral sulcus foveolate, unclear mesad; lateral pronotal area smooth with transverse sparse carinae. Propleuron smooth with imbricate sculpture. Mesoscutum about 1.4 times as wide as long (TSL/ML = 1.35-1.49), with dense setae, reticulate anteriorly, longitudinally costate posteriorly; parascutal carina absent; notaulus absent. Mesoscutellum about 2.3 times as wide as long (SW/SL = 2.10-2.43) with dense setae, longitudinally costate mesad, granulate laterad. Mesopleuron smooth with transverse dense carinae above mesopleural canina, smooth with sparse setae below mesopleural canina; prespecular and mesepisternal sulci foveolate; prespecular sulcus with setae; mesopleural carina strongly present; postacetabular sulcus foveolate. Metascutellum weakly produced, longitudinally striate. Dorsal metapleural area smooth with setae dorsad; ventral metapleural area weakly rugulose with setae; anterior part of metapleural sulcus and upper paracoxal sulcus with setae. Propodeum foveolate with setae. Fore wing (Fig. 7A ), stigmal vein about 1.6 times longer than marginal vein; postmarginal vein about 3.5 times longer than marginal vein.

Metasoma. T1 longitudinally striate, setose laterally. S1 longitudinally striate. T2 longitudinally striate anteriorly, reticulate posteriorly, setose laterally. S2 with setae, granulate mesad, striate laterad. T3 reticulate, with setae laterad and posteriorly. S3-6 punctate with setae. T4 punctate-striate with setae. T5-6 punctate with setae.

Male. Almost same as female, but antennae (Fig. 5G ) filiform; A1 yellow, A2-11 brown.

Host.

Unknown.

Material examined.

Holotype: Hokkaido, Sapporo city, Toyohira ward , Hitsujigaoka . 43.008°N, 141.415°E; alt. 100 m, 8-15.VI.2010, Kazuhiko Konishi leg. (MT) 1♀ [ ELKU]. Paratypes. Same locality as holotype , 1-8.VI.2010, Kazuhiko Konishi leg. (MT) 1♀ [ELKU]; 8-15.VI.2010, Kazuhiko Konishi leg. (MT) 1♀ [ELKU]; 22-29.VI.2010, Kazuhiko Konishi leg. (MT) 1♀ [ELKU]; 6-13.VII.2010, Kazuhiko Konishi leg. (MT) 1♀ [ELKU]; 27.VII.-3.VIII.2010, Kazuhiko Konishi leg. (MT) 1♂ [ELKU]; 1♂ 1♀ [EUMJ]; Tokyo pref., Minami-Tama dist. , Asakawa town, Mt. Takao-san , 19.V.1935, H. Ise leg. 1♀ [NIAES]; Nagano pref., Ueda city, Sugadaira-Kôgen, Tsukuba University , 26. VII-1.VIII.2015. So Shimizu leg. (MT) 1♀ [ELKU]; Gifu pref., Kani city, Katabira , 10-16.IV.2004, Kenzo Yamagishi leg. (MT) 1♀ [ELMU]; 26.VI.-2.VII.2004. Kenzo Yamagishi leg., 1♀ [ELMU]; 24-30.VII.2004. Kenzo Yamagishi leg., 2♀ [ELMU]; Tottori pref., Saihaku dist. , Daisen town, Mt. Daisen , 25.VIII.1970. 1♂ 1♀ [ELKU]; Fukuoka pref., Fukuoka city, Sawara ward, Mt. Sefuri-san , 1.VIII.1992, Yoshimitsu Higashiura leg. 1♀ [ELKU]; Tagawa dist. , Soeda town, Mt. Hiko-san . 12.IX.1968, (MT) 1♀ [ELKU]; 11.VII.1969. Kenkichi Kanmiya leg. 3♂ 3♀ [ELKU]; 12-19.V.2008, Toshiharu Mita and Sinsuke Sato leg. (MT) 1♀ [ELKU]; Kumamoto pref., Yatsushiro dist. , Izumi vill., Shiratori rindô , 9.VIII.1992. 1♂ [ELKU].

Distribution.

Japan (Hokkaido; Honshu: Tokyo, Nagano, Gifu, and Tottori; Kyushu: Fukuoka and Kumamoto)

Etymology.

The species name refers to the yellow coxae.

Remarks.

Among Japanese species, G. fulvicoxa sp. nov. is very similar to G. japonicum (Ashmead, 1904) in the sculpture of the head but differs from it in the shape of the horizontal portion of the occipital carina ( G. fulvicoxa (Fig. 4A ): straight, short; G. japonicum (Fig. 4B ): curved, relatively long), sculpture of mesopleuron (carinae of G. fulvicoxa (Fig. 2A ) stronger than G. japonicum (Fig. 2B )) and the color of the coxae ( G. fulvicoxa (Fig. 2A ): yellow; G. japonicum (Fig. 2B ): brown). The sculpture of the frons in G. fulvicoxa (Fig. 4A ) is finer than that of G. japonicum (Fig. 4B ). Russian Far Eastern species, G. amissum Kozlov & Kononova, 1990, is also similar to G. fulvicoxa in the shape of the horizontal portion of the occipital carina. However, in G. amissum , the sculpture of frons is regularly arranged like G. yamagishii , the sculpture of mesopleuron is transversely costate with granulate sculptute between lower costae, mesopleural carina is weak, and the color of coxa is dark brown to black. Talamas and Pham (2017) provided images of type specimens of Vietnamese Scelionidae deposited in Institute of Ecology and Biological Resources, Hanoi, Vietnam, and we also examined these type specimens. According to these images and our examination, G. alames Kozlov & Lê, 1996, G. avanus Kozlov & Lê, 1996, and G. cromion Kozlov & Lê, 1997 have a horizontal portion of the occipital carina similar to G. fulvicoxa . The color of coxa of these species are dark brown to black, however, that of G. fulvicoxa is yellow.

Figures

Figure 1. Japanese Gryon spp., dorsal view A G. fulvicoxa sp. nov., holotype B G. japonicum C G. yamagishii D G. philippinense E G. shisa sp. nov., holotype F G. pennsylvanicum. Scale bars: 1 mm.

Figure 2. Japanese Gryon spp., lateral views A G. fulvicoxa sp. nov., holotype B G. japonicum C G. yamagishii D G. philippinense E G. shisa sp. nov., paratype F G. pennsylvanicum. Scale bars: 1 mm.

Figure 3. Frons of Japanese Gryon spp. A G. fulvicoxa sp. nov. B G. japonicum C G. yamagishii D G. philippinense E G. shisa sp. nov. F G. pennsylvanicum.

Figure 4. Occiput of Japanese Gryon spp. A G. fulvicoxa sp. nov. B G. japonicum C G. yamagishii D G. philippinense E G. shisa sp. nov. F G. pennsylvanicum.

Figure 5. Antennae of Japanese Gryon spp. A G. fulvicoxa sp. nov., female B G. japonicum, female C G. yamagishii, female D G. philippinense, female E G. shisa sp. nov., female F G. pennsylvanicum, female G G. fulvicoxa sp. nov., male H G. japonicum, male I G. yamagishii, male J G. philippinense, male K G. shisa sp. nov., male L G. pennsylvanicum, male.

Figure 6. Forewing of Japanese Gryon spp. A G. fulvicoxa sp. nov. B G. japonicum C G. yamagishii D G. philippinense E G. shisa sp. nov. F G. pennsylvanicum.

Figure 7. Mesosoma of Japanese Gryon spp. A G. japonicum, dorsal view B lateral view C G. philippinense, dorsal view D lateral view E G. pennsylvanicum, dorsal view F lateral view.