Tetrastichus nymphae, Hansson & Schmidt, 2020

Hansson, Christer & Schmidt, Stefan, 2020, A revision of European species of the genus Tetrastichus Haliday (Hymenoptera: Eulophidae) using integrative taxonomy, Biodiversity Data Journal 8, pp. 59177-59177 : 59177

Tetrastichus nymphae sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: R. Gregorek & M. Suvak; individualID: BC-ZSM-HYM-26562-H10; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Tetrastichusnymphae; phylum: Arthropoda; class: Insecta; order: Hymenoptera; family: Eulophidae; genus: Tetrastichinae; taxonRemarks: Holotype deposited in MZLU; Location: country: Slovakia; decimalLatitude: 48.3689; decimalLongitude: 21.705; Record Level: type: PhysicalObject; language: en; institutionCode: MZLU; basisOfRecord: PreservedSpecimen Type status: Paratype. Occurrence: occurrenceDetails: http://www.boldsystems.org/index.php/API_Public/specimen?ids=BC-ZSM-HYM-26562-H11; catalogNumber: BC-ZSM-HYM-26562-H11 ; recordNumber: BC-ZSM-HYM-26562-H11; recordedBy: R. Gregorek & M. Suvak; individualID: BC-ZSM-HYM-26562-H11; individualCount: 1; sex: female; lifeStage: adult; Taxon: scientificName: Tetrastichusnymphae; phylum: Arthropoda; class: Insecta; order: Hymenoptera; family: Eulophidae; genus: Tetrastichinae; Location: country: Slovakia; decimalLatitude: 48.3689; decimalLongitude: 21.705; Record Level: type: PhysicalObject; language: en; institutionCode: MZLU; basisOfRecord: PreservedSpecimen Type status: Paratype. Occurrence: occurrenceDetails: http://www.boldsystems.org/index.php/API_Public/specimen?ids=BC-ZSM-HYM-26562-H10; catalogNumber: BC-ZSM-HYM-26562-H10 ; recordNumber: BC-ZSM-HYM-26562-H10; recordedBy: R. Gregorek & M. Suvak; individualID: BC-ZSM-HYM-26562-H10; individualCount: 1; sex: male; lifeStage: adult; Taxon: scientificName: Tetrastichusnymphae; phylum: Arthropoda; class: Insecta; order: Hymenoptera; family: Eulophidae; genus: Tetrastichinae; Location: country: Slovakia; decimalLatitude: 48.3689; decimalLongitude: 21.705; Record Level: type: PhysicalObject; language: en; institutionCode: MZLU; basisOfRecord: PreservedSpecimen

Description

FEMALE holotype (Fig. 51). Body length 1.3 mm (paratypes 1.4 mm). Head. Width/length in dorsal view 2.5, width/length in frontal view 1.2, POL/OOL 1.8, widths head/mesosoma 0.9, mouth width/malar space 1.4, malar space/eye height 0.5. Antenna. Scape length/eye height 0.9, pedicel+flagellum length/mesosoma width nm, length/width F1, F2, F3 1.3, 1.2, 1.1, clava length/width nm, lengths pedicel/F1 0.9, lengths F1/F2 1.0, F1/F3 1.1, lengths F1, F2, F3/clava nm, widths F1/pedicel (dorsal view) 1.0, lengths antennal spicule/C3 nm. Mesosoma. Length/width 1.3, mesoscutal mid-lobe length/width 0.8, mid-lobe with a weak median groove that is absent in anterior ¼, with three adnotaular setae on each side, lengths mesoscutum/mesoscutellum (measured medially) 1.2, mesoscutellum length/width 1.0, length/width of enclosed space between submedian grooves 1.2, distance between SMG/distance between SMG and SLG 2.1, lengths dorsellum/propodeum 0.6, propodeum with rather strong reticulation and partly smooth, propodeal callus with two setae. Fore wing. Costal cell length/width 11.0, lengths costal cell/marginal vein 1.0, lengths marginal/stigmal veins 2.5. Gaster. Ovate, length/width 1.5, lengths gaster/mesosoma 1.2, Gt7 length/width 0.6, length of longest cercal seta/next longest seta 2.0, longest cercal seta sinuate, ovipositor sheaths projecting beyond Gt7.

Colour. Body dark brown to black non-metallic, antenna dark brown, tegulae black, wings hyaline with venation yellowish-brown, coxae, trochanters and femora concolorous with body, tibiae yellowish-brown, fore tarsus pale brown, mid and hind tarsi yellowish-brown with T4 brown.

MALE. Body length 1.3 mm. Head. Width/length in dorsal view 2.5, width/length in frontal view 1.3, eye height/malar space 1.5, mouth width/malar space 1.2, widths head/mesosoma 1.1. Antenna. F1-F4 with basal whorls of setae, reaching beyond apex of corresponding flagellomere, whorled setae on F1 2.0 × as long as F1 length, scape length/eye height 1.0, scape length/width 2.6, ventral plaque placed centrally, lengths ventral plaque/scape 0.4, pedicel+flagellum length/mesosoma width 1.7, length/width F1, F2, F3, F4 1.3, 1.5, 1.4, 1.3, clava length/width 4.0, lengths pedicel/F1 1.2, lengths F1/F2 0.8, F1/F3 0.7, F1/F4 0.8, lengths F1, F2, F3 F4 /clava 0.3, 0.4, 0.4, 0.4.

Colour. Similar to female.

Diagnosis

Mesoscutellum ± flattened, distance between submedian groove 2.1 × distance between submedian and sublateral grooves, female gaster ovate, 1.5 × as long as wide, with ovipositor sheaths reaching beyond apex of Gt7.

Distribution

Slovakia.

Ecology

Host

Gregarious endoparasitoid on Galerucella nymphaeae (L.) ( Coleoptera : Chrysomelidae ) ( Suvak et al. 2012 parasitoid identified as Tetrastichus clito ).

Remarks

The type specimens are in poor condition, shrivelled and with parts missing: the holotype lacks antennal clava on both sides and left mid tibia and tarsus.

Additional paratype examined

1 ♀, same data as holotype (MZLU).

Notes

Holotype deposited in MZLU, paratypes in MZLU.