Alloxysta staryi Ferrer-Suay & Pujade-Villar, 2023

Ferrer-Suay, Mar, Pujade-Villar, Juli & Selfa, Jesús, 2023, Four new species of Alloxysta (Hym.: Cynipoidea: Figitidae: Charipinae) from Petr Starý’s collection, European Journal of Taxonomy 910, pp. 56-68 : 64-66

Alloxysta staryi Ferrer-Suay & Pujade-Villar sp. nov.

urn:lsid:zoobank.org:act:7D3238EA-F499-4FEC-896F-E81A1EF0962B

Fig. 4

Diagnosis

Alloxysta staryi sp. nov. is characterized by the presence of pronotal carinae and propodeal plate, radial cell partially open being 2.3 times as long as wide, rhinaria and club begin on F2, F1 longer than pedicel and subequal to F2, F2 longer than F3. It is similar to A. melanogaster (Hartig, 1840) male but they can be differentiated by the beginning of rhinaria and club: F 2 in A. staryi but F 3 in A. melanogaster ; and the proportion between flagellomeres: F1 longer than pedicel and subequal to F2, F2 longer than F 3 in A. staryi while pedicel-F3 subequal in length in A. melanogaster .

Etymology

This species is named after Petr Starý, collector of the material, and without whom this material would not have been possible to be studied.

Material examined

Known only from one male.

Holotype

CZECH REPUBLIC • ♂; Byšice, Bc; 16 Jun. 1959; Hosman leg.; Salix sp. ; Aphis farinosa ; Aphidius salicis ; 59/132; UB.

Description

LENGTH. Female unknown. Male: 1.0 mm.

COLOURATION. Head yellow, mesosoma and metasoma brown. Scape, pedicel, F1–F3 dark yellow, F4– F11 yellowish brown. Legs yellow and veins yellowish brown.

HEAD. Transversally ovate, smooth and shiny, slightly wider than high in front view. Setae below and between toruli, few scattered setae above toruli. Scattered setae on vertex and many setae on face. Transfacial line 0.87 times the height of compound eye. Malar space 0.3 times the height of compound eye.

ANTENNA. Male: 14-segmented, filiform. All antennomeres covered with sparse setae. F1 smooth and thinner than remaining flagellomeres, F2–F12 with placodeal sensilla and club shaped. Antennal formula: 2.0 (1.2); 2.5 (0.9); 2.5 (1.1); 2.3 (1.1); 2.5 (4.3); 2.5 (1.3), F5–F12 subequal in length, width, and shape ( Fig. 4E ). Female unknown.

MESOSOMA. Pronotum covered by disperse setae, being less in the distolateral corners and abundant in the anterior margins, with two small carinae present ( Fig. 4B ). Mesoscutum smooth and shiny, round in dorsal view with few scattered setae. Scutellum smooth and shiny with scattered setae, more abundant on apex of scutellum. Propodeum covered by abundant long pubescence, with protruding plate, this plate has a few setae on first half and curved sides ( Fig. 4D ).

FORE WING. Longer than body, 1.4 times as long as mesosoma and metasoma together. Covered with dense pubescence; marginal setae present and very long ( Fig. 4A ). Partially open radial cell, 2.3 times as long as wide. R1 short and curved; Rs long and slightly curved ( Fig. 4A ).

METASOMA. Anterior part with an incomplete ring of setae, glabrous at centre, wider laterally. Metasoma smooth and shiny, T3 and T4 clearly distinguished.

Distribution

Obec Byšice ( Czech Republic).

Host

Emerged from Aphis farinose Gmelin, 1790 ( Hemiptera : Aphididae ) via Aphidius salicis Haliday, 1834 ( Braconidae : Aphidiidae ) on Salix L. ( Salicaceae ).

Figures

Fig. 4. Alloxysta staryi Ferrer-Suay & Pujade-Villar sp. nov., holotype, ♂ (UB). A. Fore wing. Inset: detail of radial cell; arrow marks the limit of R1 vein.B. Pronotum.C. Body.D. Propodeum. E. Antenna. Scale bars = 50 µm.