Dendrocerus lui Li and Wang, 2023

Li, Fang, Cui, Shanshan, Huang, Yixin, Wang, Xuan, Chen, Huayan & Wang, Xu, 2023, Dendrocerus lui (Hymenoptera, Ceraphronoidea, Megaspilidae): a new species of Dendrocerus carpenteri species-group from China, Biodiversity Data Journal 11, pp. 108742-108742 : 108742

Dendrocerus lui Li and Wang, 2023 sp. nov.

Materials

Type status: Holotype. Occurrence: sex: male; lifeStage: adult; associatedSequences: GenBank OR120392 ; occurrenceID: B8B29425-304A-5D0F-837E-4217CAECD7A8; Taxon: scientificName: Dendrocerus lui; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Hymenoptera ; family: Megaspilidae ; genus: Dendrocerus ; specificEpithet: lui; taxonRank: species; Location : country: China; stateProvince: Chongqing; county: China; municipality: Linkouzi ; Event : year: 2022; month: 8; day: 22-26; verbatimEventDate: 22-26/08/2022; Record Level : language: en; rightsHolder: Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources , Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases , College of Life Sciences , Anhui Normal University ; institutionCode: Anhui Normal University (AHN) Type status: Paratype. Occurrence: sex: 2 females; lifeStage: adult; associatedSequences: GenBank: OR120391 ; occurrenceID: 98EE08D6-F526-5E40-BD13-F781C5E8BC41; Taxon: scientificName: Dendrocerus lui; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Hymenoptera ; family: Megaspilidae ; genus: Dendrocerus ; specificEpithet: lui; taxonRank: species; Location : country: China; stateProvince: Chongqing; county: China; municipality: Luomadian ; verbatimCoordinates: 31°27'N, 109°56'E; verbatimLatitude: 31°27'; verbatimLongitude: 109°56′; Event : year: 2022; month: 8; day: 10; verbatimEventDate: 10/08/2022; Record Level : language: en; rightsHolder: Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources , Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases , College of Life Sciences , Anhui Normal University ; institutionCode: Anhui Normal University (AHNU) Type status: Paratype. Occurrence: sex: 2 females; lifeStage: adult; occurrenceID: 9F1FF89D-7973-5B4A-B321-66E6400CA2EE; Taxon: scientificName: Dendrocerus lui; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Hymenoptera ; family: Megaspilidae ; genus: Dendrocerus ; specificEpithet: lui; taxonRank: species; Location : country: China; stateProvince: Chongqing; county: China; municipality: Luomadian ; verbatimCoordinates: 31°27'N, 109°56'E; verbatimLatitude: 31°27'; verbatimLongitude: 109°56′; Event : year: 2022; month: 6; day: 28; verbatimEventDate: 28/06/2022; Record Level : language: en; rightsHolder: Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources , Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases , College of Life Sciences , Anhui Normal University ; institutionCode: Anhui Normal University (AHNU)

Description

Male: Body length: 1.9 mm.

Colouration (Fig. 1 ): Head, mesosoma and metasoma black. Base of the pedicle segment light brown and the rest black. Mouthparts, maxilla, mandible and middle of eyes light brown; margin of eyes and ocelli slightly silvery. Legs yellowish-brown; coxa, middle of the tibia and tibial segments and ends of the tarsus dark brown to black. Transparent wing, stigma light coffee colour. Male genitalia light brown.

Head (Fig. 1 C): Slightly wider than mesosoma (about 1.2 × wider than mesosoma). HH:EHf = 2. HH:HL = 1.4. HW:IOS = 1.7. HW:HH = 1.1. POL:OOL = 1.2. Ocellar triangle with broad base, OOL:LOL = 2.2. Head shape oval in side view. Facial pit present and shallow, females not present. Preocellar pit small, ocellar fovea and present (Fig. 1B). Preoccipital lunula present, more distinct and transverse in males than in females. Preoccipital furrow present. Upper of the scrobes W shape, intertorular carina absent (Fig. 1E). Frons with sparse hairs, forehead setae free.

Antennae (Fig. 1 C): Scape nearly three times longer than wide, pedicel small and almost a droplet. Scape length vs. pedicel length: 4. Scape length vs. F1 length: 1.8. F1 length vs. pedicel length: 2.3. F1 length vs. F2 length: 1.2. Scape is equal to the sum of lengths F1 and F2. Longest flagellomere: F9. F1-F5 trapezoidal, about 4 times as long as broad. F1-F9 pubescence gradually shortening.

Mesosoma (Fig. 1 B, D): Mesosoma slightly narrow (1.4 × longer than wide) (Length/width/height = 700/450/500 µm); densely pubescent, alutaceous in sculpture; mesoscutum: (length/width: 290/450), mesoscutum 1.6 × wider than long, (Ascw/Pscw: 390/340). Shallow sulcus on the mesoscutum lying lateral to the notaulus and parallel to median mesoscutal sulcus, half the length of the mesoscutum. Scutellum: (length/width: 280/290), scutellum width almost equal to length; scutoscutellar sulcus foveolate, continuous with interaxillar sulcus. Axilla width slightly longer than length. Posterior of scutellum foveolate. Pronotum triangular with a raised area and a circular depression on the upper right. Anterior mesopleural sulcus foveolate.

Wings (Fig. 1 F): Forewing length 1.4 mm. Hyaline, densely pubescent and marginal fringes numerous. Stigma (length/width: 190/120) 1.6 × as long as wide, semicircular, posterior margin (part of pterostigma) straight. Radius (210 µm), curved a little in the latter and slightly longer (1.1 ×) than stigma. Hind-wing without venation.

Metasoma (Fig. 1 G): Metasoma shaped oval, slightly elongated. Metasoma 2 × longer than wide (length/width/height: 840/410/370). Metasoma smooth, but with reticular pattern on the back half of the metasoma. Syntergum reaching 56% of metasomal length. Five grooves gastral reaching 22% length of syntergum. Syntergal translucent patch present, heart-shaped. Syntergum absent.

Male genitalia (Fig. 2 ): Genitalia with short cupula. Harp cylindroid (terminal constriction), shorter than gonostipes (reaching 3/5 to gonostipes), setae (part of harpe) length equal to harpe width. Gonostipes as wide as long; parossiculus fused with gonostipes. Setae (part of parossiculus) present apically. Gonossiculus with four spines apically. Penis valva terminal bending inwards.

Females (Fig. 3 ): Same as the males, except for the following characters: Body length: 2.1-2.4 mm. Antennal scape long, slightly longer than the length of flagellum 1, 2, 3 combined; flagellum gradually expanded to the end. Legs tawny, coxa blackish-brown. The metasoma fusiform.

Diagnosis

This new species belongs to the D. carpenteri species-group as indicated by the morphology of the male antennae: the outline of the flagellum is serrated at the base, but the length of the flagellum is greater than the width, with a triangular or trapezoidal outline. Then it was compared with the other 12 known species (Suppl. material 1) of this species-group. It can be classified into five types, based on the difference of antennae in D. carpenteri species-group: F1-F4 are trapezoidal, F1-F5 are trapezoidal, F1-F7 are trapezoidal, F1-F8 are trapezoidal and F2-F4 are trapezoidal (Suppl. material 1). Of these, F1-F5 only in D. lui sp. nov. and D. liebscheri are trapezoidal. However, the notauli of D. lui sp. nov. are not convergent posteriorly (the notauli of D. liebscheri are strongly convergent and connected posteriorly).This new species can be separated from other species by the following characters: head, mesosoma and metasoma black; five gastral carinae, syntergal translucent patch heart-shaped, harpe of male genitalia cylindroid, digitiform apically.

Etymology

In recognition of the collector Decai Lu, this species is named after the surname of the collector.

Distribution

China (Chongqing).

Figures

Figure 1. Dendrocerus lui Li and Wang, sp. nov., male, holotype. A dorsal habitus; B head and mesosoma, dorsal view; C lateral habitus; D head and mesosoma, lateral view; E head, anterior view; F wings; G metasoma, dorsal view.

Figure 2. Dendrocerus lui Li and Wang, sp. nov., male, holotype, genitalia. A dorsal view; B lateral view.

Figure 3. Dendrocerus lui Li and Wang sp. nov., female, paratype. A dorsal habitus; B head and mesosoma, dorsal view; C lateral habitus; D head and mesosoma, lateral view; E head, anterior view; F wings; G metasoma, dorsal view.