Spilomicrus brevimalaris Huebner & Chemyreva, 2024

Huebner, Jeremy Joshua & Chemyreva, Vasilisa, 2024, Review of German Spilomicrus Westwood (Hymenoptera, Diapriidae, Spilomicrini), Biodiversity Data Journal 12, pp. 114515-114515 : 114515

Spilomicrus brevimalaris Huebner & Chemyreva sp. nov.

Materials

Type status: Holotype. Occurrence: catalogNumber: ZSM-HYM-33100-G04 ; recordedBy: Huebner & Chemyreva; individualCount: 1; sex: male; lifeStage: adult; otherCatalogNumbers: BOLD:AEC2138; occurrenceID: CBACBA07-062E-5C74-B9EE-8C7847C5FED0; Taxon: scientificName: Spilomicrus brevimalaris; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Hymenoptera ; family: Diapriidae ; genus: Spilomicrus ; specificEpithet: brevimalaris; scientificNameAuthorship: Huebner & Chemyreva, 2023; Location : continent: Europe ; country: Germany; stateProvince: Bavaria; locality: Ammergau Alps ; verbatimElevation: 901; decimalLatitude: 47.606; decimalLongitude: 10.841; Identification : identifiedBy: V. Chemyreva I J. Huebner; dateIdentified: 2023; Event : eventID: dv.hale1.05; samplingProtocol: malaise trap; eventDate: 18-Jul-2016; Record Level: ownerInstitutionCode: SNSB-ZSM Type status: Paratype. Occurrence: catalogNumber: BC-ZSM-HYM-25934-G09 ; recordedBy: Huebner & Chemyreva; individualCount: 1; sex: female; lifeStage: adult; otherCatalogNumbers: BOLD:AEC2138; occurrenceID: E02F385D-99B0-5BFB-B947-7FE75E5C9CD1; Taxon: scientificName: Spilomicrus brevimalaris; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Hymenoptera ; family: Diapriidae ; genus: Spilomicrus ; specificEpithet: brevimalaris; scientificNameAuthorship: Huebner & Chemyreva, 2023; Location : continent: Europe ; country: Germany; stateProvince: Bavaria; locality: Ammergau Alps ; verbatimElevation: 1430; decimalLatitude: 47.5718; decimalLongitude: 10.8807; Identification : identifiedBy: V. Chemyreva I J. Huebner; dateIdentified: 2023; Event : eventID: dd.amg9.02; samplingProtocol: malaise trap; eventDate: 22-Jul-2015; Record Level: ownerInstitutionCode: SNSB-ZSM Type status: Paratype. Occurrence: catalogNumber: ZSM-HYM-33108-G09 ; recordedBy: Huebner & Chemyreva; individualCount: 1; sex: female; lifeStage: adult; otherCatalogNumbers: BOLD:AEC2138; occurrenceID: 9BF2145E-DC54-5FE1-AF53-FCC9ADB054C3; Taxon: scientificName: Spilomicrus brevimalaris; kingdom: Animalia ; phylum: Arthropoda ; class: Insecta ; order: Hymenoptera ; family: Diapriidae ; genus: Spilomicrus ; specificEpithet: brevimalaris; scientificNameAuthorship: Huebner & Chemyreva, 2023; Location : continent: Europe ; country: Germany; stateProvince: Baden-Wuerttemberg; locality: Malsch ; verbatimElevation: 120; decimalLatitude: 48.884; decimalLongitude: 8.32; Identification : identifiedBy: V. Chemyreva I J. Huebner; dateIdentified: 2023; Event : eventID: dd.mgart2.13; samplingProtocol: malaise trap; eventDate: 16-Aug-2020; Record Level: ownerInstitutionCode: SNSB-ZSM

Description

Male. Body length 1.4 mm; forewings reaching far beyond apex of metasoma; antenna 0.9 times as long as body.

Head: black; in dorsal view 1.35 times as wide as long, as wide as mesosoma. Temples behind eyes gradually receding posteriorly. Tentorial pit tiny. Malar sulcus absent. Clypeus weakly convex, oval, 1.7 times as wide as high. Mandible reddish-brown, elongate, with upper tooth slightly shorter than lower tooth. Palpi yellow. Eye oval, with scattered long setae; 0.6 times as high as head and 3.8 times as high as malar space. Frons above base of toruli smooth. Postgenal cushion scanty (Fig. 2 ). Antennae: A1 slightly curved, smooth; its apical rim with small lamellae. A2 not compressed. A2-A13 brown, A13 1,3 times as long as A12. Antennomeres length to width ratios in lateral view as in Fig. 2 C. Mesosoma: dark brown, as wide as high. Neck bare, with shallow longitudinal grooves. Pronotum with median area and pronotal corner pubescent, pronotal cushion dense; pronotal corner weakly prominent, rounded; lateral area of pronotum smooth, bare medially. Tegula brown, large. Mesoscutum convex, 1.2 times as wide as long. Humeral sulcus distinct and narrow. Scutellum slightly convex. Anterior scutellar pits large, circular, smooth inside, with narrow septum. Axillar depression finely pubescent and smooth. Lateral scutellar pit broad. Posterior scutellar pits distinct. Mesopleuron shining bare and smooth, with subalar ridge, longitudinal wrinkles postero-ventrally above middle coxa and sculpture around epicnemial pit. Epicnemial pit tiny, without pubescence inside. Sternaulus absent. Ventral side of mesopleuron scarcely pubescent. Metanotum pubescent, finely sculptured, with three weakly-projecting keels on metascutellum. Propodeum entirely pubescent and coarsely rugose. Median propodeal keel in lateral view projecting into high spine anteriorly (Fig. 2 A). All legs slender, pale brown with separated trochantelli. Wings: Stigmal vein as long as width of marginal vein. Costa, basal and cubital veins sclerotised and weakly pigmented. Metasoma: Petiole 1.9 times as long as wide, cylindrical, entirely longitudinally grooved. Petiole pubescent ventrally and dorsally in anterior part. T2 2.8 times as long as petiole, mainly bare and smooth, with small bunch of setae laterally at anterior margin. T3-T5 sparsely pubescent with semi-erect long setae, smooth. T6 small, setose and bare. T7 tapered, setose. S3-S7 with scattered setae, smooth.

Female. Body length 1.6-1.7 mm. Wings 0.9-1.0 times as long as the body. Pleurostomal distance 0.8 times as long as shortest distance between eyes (Fig. 3 C). Malar distance 0.7 times as long as largest diameter of eye. Аntennae brown, clavate with abrupt 5-segmented clava, A13 without ventral pit, A4-A8 moniliform and slightly elongate, A10-A13 with distinct MGS brush ventrally. Scutellum transverse, 0.8 times as long as wide (measured without anterior scutellar pits) (Fig. 3 B). Petiole elongate, 1.3-1.4 as long as wide. T2-T8 smooth. S3-S5 smooth. S6 smooth and densely setose. A more detailed description of the female is given by Chemyreva (2021). The females of S. brevimalaris sp. nov. were mistakenly described in Chemyreva (2021) as S. lusitanicus .

Diagnosis

Male. Body length 1.3-2.1 mm. Face without malar sulcus, pleurostomal distance slightly wider than shortest distance between eyes (Fig. 4 B). Malar distance 0.20-0.25 times as long as largest diameter of eye. Front smooth. Аntennae brown, slender and long, with A5-A12 2.0-2.7 times as long as wide in dorsal view. A4 1.1-1.4 times as long as A3 and with keel and emargination reaching 0.55-0.60 of the segment length. Notauli extending to the half of mesoscutum length. Scutellum convex, as long as wide (measured without anterior scutellar pits) (Fig. 2 B). Propodeum with weakly-arcuate emargination in dorsal view between plicae. Basal vein and distal part of CU dark and sclerotised. Marginal vein short, less than 1.5 times as long as wide. Petiole elongate, about 1.5-2.0 times as long as wide. T2 pubescent at the base. S8 setose and densely micropunctate.

Etymology

The name of this species is a composite Latin masculine adjective derived from “brevis” and “malar” and refers to the short malar distance typical for the males of the new species.

Distribution

Germany, Russia (European part). Further BIN records are online available for Italy and Norway. Probably further distributed around western Europe.

Notes

The male specimen was used in this case as a holotype, since there is no possibility to use females for the S. lusitanicus -species group (both species, S. brevimalaris sp. nov. and S. flavecorpus sp. nov., are very close to S. lusitanicus (Kieffer)). There are two reasons for that: 1) the female for the S. lusitanicus is unknown; 2) The most reliable feature to determine this species is the length of the malar space, but this feature does not work for the female determination.

The Russian material that was recorded by Chemyreva (2021) as (the closely related) S. lusitanicus actually belongs to S. brevimalaris sp. nov.

Figures

Figure 2. Male holotype Spilomicrus brevimalaris sp. nov. (ZSM-HYM- 33100 - G 04; BOLD: AEC 2138). A lateral; B dorsal; C antenna.

Figure 3. Female paratype Spilomicrus brevimalaris sp. nov. (ZSM-HYM- 33108 - G 09; BOLD: AEC 2138). A lateral; B dorsal; C face frontal; D antenna.

Figure 4. Faces of the males. A Spilomicrus lusitanicus; B Spilomicrus brevimalaris sp. nov.; C Spilomicrus flavecorpus sp. nov.