Alloxysta crassa ( Cameron, 1889 ), 2013

Ferrer-Suay, Mar, Selfa, Jesús, Notton, David G. & Pujade-Villar, Juli, 2013, Revision of the types of species of Alloxysta described by Cameron and Fergusson (Hymenoptera: Figitidae: Charipinae) and deposited in the Natural History Museum (London), including a key to the fauna of Great Britain, European Journal of Taxonomy 53, pp. 1-27 : 9-11

Alloxysta crassa ( Cameron, 1889) stat. rev.

Fig. 3

Allotria crassa Cameron, 1889: 59 .

Dilyta crassa − Kieffer 1900: 114.

Alloxysta (Alloxysta) crassa − Dalla Torre & Kieffer 1902: 38.

Alloxysta crassa − Hellén 1963: 12.

Type material

Lectotype

♀, designated by Quinlan (1974: 7), with the following labels: “ Lectotype ” (round label with blue margins), “Bonar” (handwritten), “ crassa Cam ” (handwritten), “Cameron 96 76, Bonar Bridge, Sutherland, Scotland ”, “ Lectotype of Allotria crassa Cam. ♀ det. J. Quinlan, 1973”, “B.M. Type Hym. 7.128”, “ Alloxysta crassa ( Cameron, 1889) ♀ det. M. Ferrer-Suay 2012”.

Redescription

COLORATION. Head yellowish brown, mesosoma and metasoma brown. Scape, pedicel and F1-F3 dark yellow; F4-F11 brown. Legs dark yellow and veins yellowish brown.

HEAD. Transversely ovate, smooth and shiny, wider than high in front view. With setae below, between and a few above toruli. With few scattered setae on vertex and with many setae on face. Transfacial line 1.2 x height of compound eye. Malar space 0.5 x height of compound eye.

ANTENNA. Female: 13-segmented, filiform. All antennomeres covered with sparse setae. F1-F3 thinner and smoother than remaining flagellomeres; F4-F11 club-shaped, with rhinaria. Pedicel 1.7 x as long as wide; F1 3.3 x as long as wide; F2 3.6 x as long as wide; F3 3.6 x as long as wide; F4 3.0 x as long as wide. F1 1.7 x as long as pedicel; F1 1.2 x as long as F2; F2-F11 subequal in length, width and shape ( Fig. 3B ). Male unknown.

MESOSOMA. Pronotum covered by abundant setae, less at distolateral margins; with two thick, clearly visible carinae ( Fig. 3D ). Mesoscutum smooth and shiny, round in dorsal view, with scattered setae. Scutellum also smooth and shiny, with few scattered setae, abundant on apex of scutellum. Height of mesopleural triangle along anterior margin 0.9 x height of mesopleuron. Propodeum covered by abundant setae, propodeal carinae absent ( Fig. 3F ).

FORE WING. Longer than body, 1.5 x as long as mesosoma and metasoma together ( Fig. 3A ). Covered with dense pubescence; marginal setae present. Completely open radial cell, 2.8 x as long as wide. R1 short and straight; Rs long and slightly curved ( Fig. 3C ).

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

Remarks

This species was synonymized by Fergusson (1986) with A. macrophadna ( Hartig, 1841) . Alloxysta crassa is represented in BMNH by the lectotype female and 3 paralectotype females. Comments on the type series of A. crassa are presented in Quinlan (1974: 7). However, after revising the lectotype we found that it is a different and valid species. Alloxysta crassa can be differentiated from A. macrophadna by the shape of the radial cell: completely open in A. crassa ( Fig. 3C ) while partially open in A. macrophadna ; relation between flagellomeres: F2 longer than F1 and F 3 in A. crassa ( Fig. 3B ), whereas F2 is subequal to F1 and slightly longer than F 3 in A. macrophadna .

Figures

Fig. 3. Alloxysta crassa (Cameron, 1889). A. Fore wing. B. Antenna, ♀. C. Fore wing radial cell (arrow illustrates that the radial cell is completely open). D. Pronotum. E. Lateral habitus, ♀. F. Propodeum.