Alloxysta semiaperta Fergusson, 1986

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 : 18-20

Alloxysta semiaperta Fergusson, 1986

Fig. 7

Alloxysta semiaperta Fergusson, 1986: 11 .

Type material

Holotype

♀, with the following labels: “ England: Oxon , 1.ix.1977, L.A. Mound Ex Epilobium ”, “ Holotype ” (round label with red margin), “ Holotype of Alloxysta semiaperta det. N.D.M. Fergusson, 1984”, “ B.M. Type Hym. 7.174”.

Paratype

♂, with the following labels: “ England: Oxon, 1.ix.1977, L.A. Mound, Ex. Epilobium ” (handwritten), “ ♂ ”, “ Paratype ” (round label with yellow margin), “ A. semiaperta det. N.D.M. Fergusson”.

Redescription

COLORATION. Head, mesosoma and metasoma dark brown. Scape, pedicel, F1 and F2 yellow; F3-F11 brown. Legs 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. Few setae on vertex and with many setae on face. Transfacial line 1.1 x height of compound eye. Malar space 0.4 x height of compound eye.

ANTENNA. Female: 13-segmented, filiform. All antennomeres covered with sparse setae. F1 and F2 thinner and smoother than remaining flagellomeres; F3-F11 club-shaped, with rhinaria. Pedicel 1.5 x as long as wide; F1 3.5 x as long as wide; F2 2.1 x as long as wide; F3 2.3 x as long as wide; F4 2.5 x as long as wide. F1 1.2 x as long as pedicel; F1 1.5 x as long as F2; F3 1.4 x as long as F2; F4 1.1 x as long as F3; F4-F11 subequal in length, width and shape ( Fig. 7D ). Male: 14-segmented, filiform. All antennomeres covered with sparse setae. F1-F3 thinner and smoother than remaining flagellomeres; F4-F12 club-shaped, with rhinaria. Pedicel 1.7 x as long as wide; F1 2.9 x as long as wide; F2 3.1 x as long as wide; F3 2.5 x as long as wide; F4 2.9 x as long as wide. F1 1.1 x as long as pedicel; F1 1.1 x as long as F2; F2 1.1 x as long as F3; F4 1.1 x as long as F3; F4-F12 subequal in length, width and shape ( Fig. 7C ).

MESOSOMA. Pronotum covered with abundant setae, less setae on anterior margin, with two thick, clearly visible carinae ( Fig. 7G ). 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 2.2 x height of mesopleuron. Propodeum with many setae, without carinae ( Fig. 7E ).

FORE WING. Longer than body, 1.7 x as long as mesosoma and metasoma together ( Fig. 7A ). Covered with dense pubescence; marginal setae present. Partially open radial cell, 2.7 x as long as wide. R1 short and curved; Rs long and also curved ( Fig. 7B ).

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

Remarks

Alloxysta semiaperta is represented in BMNH by 7 males and 25 females. One female was designated by Fergusson as the holotype and the rest paratypes. This species is very similar to A. macrophadna (Hartig, 1941) , because both have the radial cell partially open, pronotal carinae present and propodeal carina absent, but they differ in the proportions of the flagellomeres in both male and female: F2 shorter than F3 and F3 shorter than F 4 in females of A. semiaperta ( Fig. 4B ), whereas F2 is longer than F3 and F3 subequal to F 4 in females of A. macrophadna . Males of A. semiaperta have F1 longer than F2 and F3 shorter than F4, without any curved flagellomeres ( Fig. 4C ), whereas males of A. macrophadna have F1 subequal to F2 and F3 shorter than F4, F2 and F3 curved.

Figures

Fig. 7. Alloxysta semiaperta Fergusson, 1986. A. Fore wing. B. Fore wing radial cell (arrow indicates that the radial cell is partially open). C. Antenna, ♂. D. Antenna, ♀. E. Propodeum. F. Lateral habitus, ♀. G. Pronotum (arrow indicates presence of pronotal carinae).

Fig. 4. Alloxysta mullensis (Cameron, 1883). A. Fore wing. B. Fore wing radial cell. C. Pronotum. D. Propodeum. E. Antenna, ♀. F. Lateral habitus, ♀.