Eurytoma pediaspisi Pujade

Gómez, José Francisco, Nieves-Aldrey, José Luis, Nieves, María Hernández & Stone, Graham Nicholas, 2011, Comparative morphology and biology of terminalinstar larvae of some Eurytoma (Hymenoptera, Eurytomidae) species parasitoids of gall wasps (Hymenoptera, Cynipidae) in western Europe, Zoosystema 33 (3), pp. 287-323 : 311

Eurytoma pediaspisi Pujade i Villar, 1994

MATERIAL EXAMINED. — Ex Pediaspis aceris (S): Spain. Tarragona, Colldejou, 14.VIII.2003, J. L. Nieves leg (n = 2).

DESCRIPTION

n = 2; body length 1.37 mm (range 1.1-1.7); body width 0.63 mm (0.6-0.67) ( Figs 5F ; 7F ); body relatively short and wide; ratio L/W = 1.75; ventral margin of body segments convex; anterodorsal protuberances present from second thoracic segment to the third abdominal, not protruding beyond the dorsal margin of body segments ( Fig. 7F ). Antero-medial setae of the antennal area situated below the antennae, antero-medial setae of vertex situated more or less midway between anterior margin of vertex and the antennae ( Fig. 9E ); ratios SA/LAA = 0.33 and SA/DAV = 1.07; dorsal-labral setae longer than clypeal setae; ventral margin of clypeus with a distinct suture; labrum with slight divisions limited to apical part of labrum; flaps or lobes poorly differentiated; maxillary palps conspicuous ( Fig. 11F ).

Mandibles with two teeth; exposed in part, the tip of the first tooth visible ( Fig. 11F ); ratio L/W

Eurytoma rosae Eurytoma sp. cf. jaceae Eurytoma mayri Eurytoma aspila Eurytoma sp. cf. aspila Eurytoma cynipsea Eurytoma timaspidis Eurytoma strigifrons Eurytoma pediaspisi Eurytoma rufipes Eurytoma infracta Eurytoma brunniventris Eurytoma robusta

1T = 1.82; outer margin of first tooth strongly convex, with the tip moderately recurved; apex of the second tooth strongly recurved inwards and more or less acute; inner margin of mandible from the base of second tooth more or less straight, with the margin not interrupted ( Fig. 13F ).

BIOLOGY

A primary monophagous ectoparasitoid in sexual generation galls of Pediaspis aceris (Gmelin, 1790) on different species of Acer (Sapindaceae) .

REMARKS

Larvae of E. pediaspisi are similar to those of E. mayri in head setation patterns. However the shape of second mandibular tooth of E. pediaspisi allows an easy separation of the two species. In this latter feature the larva of E. pediaspisi resembles the larva of E. rosae , but in the latter, the second tooth is not as strongly curved inwards as in the E. pediaspisi larva ( Fig. 13F, H ).

Figures

FIG. 5.— Ventral views ofterminal-instar eurytomidlarvae:A, Eurytomaaspila (Walker,1836) ex Phanacis caulicola; B, E.brunniventris Ratzeburg, 1852 ex Cynips quercus (A); C, E. cynipsea Boheman, 1836 ex Phanacis hypochoeridis; D, E. infracta Mayr, 1904; E, E. mayri Ashmead, 1887; F, E. pediaspisi Pujade i Villar,1994; G, E. robusta Mayr, 1878; H, E. rosae Nees, 1834 ex Diplolepis rosae. Scale bars:1 mm.

FIG. 7.— Lateralviews ofterminal-instar eurytomidlarvae:A,Eurytoma aspila (Walker,1836) ex Phanacis caulicola; B, E.brunniventris Ratzeburg, 1852 ex Cynips quercus (A); C, E. cynipsea Boheman, 1836 ex Phanacis hypochoeridis; D, E. infracta Mayr, 1904; E, E. mayri Ashmead, 1887; F, E. pediaspisi Pujade i Villar,1994; G, E. robusta Mayr, 1878; H, E. rosae Nees, 1834 ex Diplolepis rosae. Scale bars:1 mm.

FIG. 9. — Anterior views of the head of terminal-instar eurytomid larvae: A, Eurytoma aspila (Walker, 1836) ex Phanacis caulicola; B, E. brunniventris Ratzeburg, 1852 ex Cynips quercus (A); C, Eurytoma infracta Mayr, 1904; D, Eurytoma mayri Ashmead, 1887; E, Eurytoma pediaspisi Pujade i Villar, 1994; F, Eurytoma robusta Mayr, 1878. Scale bars: A, B, D, F, 400 μm; C, 300 μm; E, 200 μm.

FIG. 11. — Anterior views of mouthparts of terminal-instar eurytomidae larvae:A, Eurytoma aspila (Walker,1836) ex Phanacis caulicola; B, E. brunniventris Ratzeburg, 1852 ex Cynips quercus (A); C, E. cynipsea Boheman, 1836 ex Phanacis hypochoeridis; D, E. infracta Mayr, 1904; E, E. mayri Ashmead, 1887; F, E. pediaspisi Pujade i Villar, 1994. Scale bars: A, E, 200 μm; B-D, F, 100 μm.

FIG. 13.— Anterior views of the right mandible of terminal-instar eurytomid larvae:A, Eurytoma aspila (Walker,1836) ex Phanacis caulicola; B, E. brunniventris Ratzeburg, 1852 ex Cynips quercus (A); C, E. cynipsea Boheman, 1836 ex Phanacis hypochoeridis; D, E. infracta Mayr, 1904; E, E. mayri Ashmead, 1887; F, E. pediaspisi Pujade i Villar, 1994; G, E. robusta Mayr, 1878; H, E. rosae Nees, 1834 ex Diplolepis rosae; I, E. rufipes Walker, 1832; J, E. sp. cf. aspila; K, E. sp. cf. jaceae; L, E. strigifrons Thomson, 1876 (right mandible); M, E. strigifrons (left mandible); N, E. timaspidis (Mayr, 1904). Scales bars: A, D-G, I-N, 50 μm; B, 20 μm; C, H, 100 μm.