Hydrelliaeucoila rufa Reche, 2022

Reche, Vanina & Gallardo, Fabiana, 2022, Two new species of the Neotropical genus Hydrelliaeucoila (Cynipoidea: Figitidae: Eucoilinae), Journal of Natural History 56 (1 - 4), pp. 227-239 : 232-236

Hydrelliaeucoila rufa Reche sp. nov.

urn:lsid:zoobank.org:act:FD3C3F03-EB27-49EB-A828-C2858C33378A

( Figure 2 )

Holotype

Female. ARGENTINA. Buenos Aires, Buenos Aires, - 34.5997222S, - 58.3819444W. 15 September 1912, A. Zotta coll. (MLP).

Paratypes

(2 females): ARGENTINA. Buenos Aires, Punta Lara , - 34.8206566S, - 57.9675322W . 5 April 1974, Samsone Llanos coll . (MLP) .

Description

Female ( Figure 2a ). Body length 1.30 mm, sparsely setose. Head, mesosoma and metasoma reddish brown. Antenna, mandibles, wing venation and legs yellowish brown.

Head ( Figure 2b ). Lateral and inferior area of face smooth, scattered setose; in frontal view with slightly dorso-ventral ridge adjacent to torulus. Malar sulci simple. Antenna with 13 articles, filiform; F1 twice longer than F2; F2–F11 subequal in length; F4–F11 with rhinaria. Compound eyes glabrous. Occiput striated. Vertex smooth. Pronotum. Pronotal plate smooth. Medial bridge of pronotal plate narrow, with lateral foveae open and deep. Dorsal margin of pronotal plate straight. Pronotal carina absent. Sides of pronotum slightly striated and highly setose behind genae.

Mesoscutum ( Figure 2a,c ). In lateral view as long as wide; smooth and shining. Notauli absent. Parapsidal hair line present. Parascutal impression inconspicuous.

Mesoscutellum. Scutellar foveae at base sculptured, longer than broad. Lateral bars of scutellum striated with a small fovea beneath. Dorsal surface of scutellum ( Figure 2c ) weakly sculptured, reticulate-areolate; posterior margin round. Scutellar plate ( Figure 2c ) flat and smooth, not elevated above the scutellum, drop-shaped, covers 1/2 of scutellum in dorsal view; surface smooth without glandular pit; with a dark impression on the entire edge of scutellar plate.

Mesopectum. Mesopleuron striated; with mesopleural carina and precoxal carina conspicuous, without subalar pit.

Metapectal-propodeal complex. Metapleuron slightly striated; anteroventral cavity conspicuous; posterior margin raised and hairy. Propodeum elongate, setose except on the carinae; lateral propodeal carinae subparallel.

Wings. Fore wings highly setose, hyaline, apical margin with hair fringes quite long. Hairless towards the base of wing. Marginal cell ( Figure 2a ) completely open, elongate, three times longer than broad

Legs. Mid- and hind coxae with a patch of hairs dorsolateral and posterodorsal, respectively.

Metasoma ( Figure 2a ). Smooth and shining. Hairy ring at base of syntergum complete, woolly, with a weak row of long setae on each side posteriorly; distally smooth.

Variation. Body length 1.20–1.50 mm. Marginal cell twice or three times as long as wide. Hairy ring at base of syntergum complete or incomplete dorsally.

Male. Unknown.

Etymology. In reference to the colouring of the body.

Biology. Host unknown.

Distribution. ( Figure 4 ). Argentina. It is known only from Ensenada, Buenos Aires province. This distribution belongs to the Pampean province (Chacoan subregion).

Comments. Hydrelliaeucoila rufa sp. nov. differs from the other two species known from Argentina by presenting the following combination of characters: head and mesosoma reddish brown (black in H. egeria ; dark brown in H. nonstriata sp. nov.); lateral and inferior area of face smooth (striated in H. egeria ); head in frontal view with carina adjacent to torulus (absent in H. nonstriata sp. nov.); medial bridge of pronotal plate narrow (broad in H. egeria ); with a dark impression on the entire edge of scutellar plate (without a dark impression on the entire edge in H. egeria and H. nonstriata sp. nov.).

Figures

Figure 2. Hydrelliaeucoila rufa Reche sp. nov. A- Habitus; B- Head in frontal view; C- Mesosoma and scutellum in dorsal view, arrow indicates dark impression on the entire edge. D- Head in lateral view, arrow indicated slightly dorso-ventral ridge adjacent to torulus. E- Head and mesosoma in lateral view.

Figure 4. Distribution map of Hydrelliaeucoila species from Argentina.