Ceroptres quadratifacies Lobato-Vila & Pujade-Villar 2019, sp. nov.
Creators: name: Lobato-Vila, Irene
name: Pujade-Villar, Juli
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Cynipidae
Ceroptres
Ceroptres quadratifacies

description: Ceroptres quadratifacies Lobato-Vila & Pujade-Villar sp. nov.
(Figures 10i, j, l; 16 a–m; 18b, m)
urn:lsid:zoobank.org:act: 096DD207-2EA2-4336-A373-5A32C05684E1
Type material. HOLOTYPE (♀) deposited in UB with the following labels: ‘ MEX: 103, A.N.P. Los Alamitos (San José de Gracia, AGS), 22º8’51.33’’ N, 102º24’46.73’’ W’ (white label) / ‘Ex. gall of Sphaeroteras nr pulchripennis, 2598m, Q. microphylla, (01.iii.2012) 10.iii.2012, A. Equihua and E. Estrada leg.’ (white label) / ‘ Holotype ♀ Ceroptres quadratifacies Lobato-Vila and Pujade-Villar, IL-V desig-2019’ (red label). PARATYPES (9♂ & 1♀) deposited in UB with the following labels: same as the holotype: 2♂ & 1♀; MEX: 120, same as the holotype, (01. iii.2012) 20.iii.2012: 4♂; MEX: P149, same as MEX: 120, Atrusca sp.: 3♂.
Etymology. Substantive in apposition. From the Latin terms ‘ quadratus ’ for square and ‘ facies ’ for face, as this species has face in anterior view subquadrangular-shaped and with a long malar space.
Diagnosis. This species can be easily separated from the rest of Ceroptres by having a long malar space, which is about 0.7 as long as height of compound eye in females and 0.6 in males (usually 0.4–0.5 in the rest of species; rarely 0.6); head in anterior view subquadrangular (with a different shape in the rest of species); and vertical carinae absent, rarely very short and inconspicuous (well developed or present at least close to the toruli in the rest of species, except in C. confertus).
Description. Female. Length. Body length 2.0 mm (n=2).
Color (Fig. 10i). Mainly black. Head, mesosoma and metasoma black; tegulae dark yellow, hypopygium and metasomal segments after the third segment, lighter. Antennae light brown, tips somewhat darker. All coxae and tarsi, as well as femora of hind legs, dark; the rest of the leg, yellow. Wings hyaline, veins pale yellow.
Head. In anterior view (Fig. 16a) subquadrangular-shaped, about 1.2 times as wide as high, genae not expanded behind compound eyes. Face with moderately long but not dense pubescence, lower face with short striae radiating from sides of clypeus and almost reaching ventral margin of compound eyes; medially without striae; vertical carinae absent (rarely very short and inconspicuous), even though a very small depressed area is present very close to the toruli, slightly bulged above the clypeus. Clypeus distinct, ventral margin just slightly projected over mandibles. Malar space about 0.7 times as long as height of compound eye. Anterior tentorial pits visible; pleurostomal sulcus absent, epistomal sulcus slightly impressed. Transfacial line about 1.1 times as long as height of compound eye. Toruli situated slightly below mid-height of compound eyes; distance between torulus and compound eye slightly longer than diameter of the toruli; distance between the toruli slightly shorter than diameter of the toruli. Front finely coriaceous, with neither punctures nor frontal carinae. Head in dorsal view (Fig. 16b) is about 2.0 times as wide as long. Vertex finely coriaceous and without punctures. POL:OOL:LOL = 9.5:6:4.5 and diameter of lateral ocelli, 3. Occiput finely coriaceous and without punctures.
Antennae (Fig. 16e, f). 13-segmented (8: 5: 10: 12: 12: 11.5: 10: 9: 9: 8: 8: 7: 13); filiform, not broadened apically; pubescence dense and short; placodeal sensilla visible on flagellar segments F2–F11. Pedicel almost 1.3 times as long as wide; F1 0.8 times as long as F2, F2 and F3 subequal. Last flagellar segment about 3.3 times as long as wide and almost 2.0 times as long as F10.
Mesosoma. About 1.2 times as long as high in lateral view (Fig. 16h), including nucha, with moderately long, but not dense, pubescence. Ratio of length of pronotum medially/laterally: 0.34. Dorsal part of pronotal plate complete, posteriorly with small piliferous punctures, with two distinct and moderately spaced foveae. Lateral pronotum finely coriaceous to alutaceous, without lateral carina. Mesoscutum (Fig. 16i) 1.2 times as wide as long, finely coriaceous; anterior grooves shallow, almost inconspicuous, occupying at most 1/3 of the mesoscutal length. Notauli narrow, shallow and almost complete, but faint before reaching the pronotal margin; wider posteriorly. Parapsidal grooves inconspicuous. Median groove visible at most in the posterior 1/4 of the mesoscutum. Mesoscutellum (Fig. 16i) rounded, about as long as wide, strongly wrinkled; circumscutellar carina absent; scutellar foveae small, more or less ovate, shallow, not well defined posteriorly, weakly sculptured, very close to each other and parallel to the transcutal fissure. Mesopleuron (Fig. 16h) smooth and shiny; little pubescent basally. Metapleural sulcus not well defined, reaching about 4/5 parts of the mesopleural height. Propodeum (Fig. 16j) pubescent and smooth; propodeal carinae branched, more or less parallel, sometimes somewhat divergent posteriorly. Nucha weakly sculptured dorsally and laterally, not sulcate.
Legs. Tarsal claws bidentate, with a basal lobe (Fig. 16g).
Wings. Forewings pubescent with moderately long marginal setae, slightly longer than mesosoma plus metasoma (Fig. 10i). Radial cell closed, 2.7 times as long as wide (Fig. 16k); areolet not well defined, anterior and basal veins inconspicuous. Rs+M inconspicuous. Basal cell with closely spaced setae.
Metasoma (Figs 10i, 16 l–m). Shorter than head plus mesosoma, slightly longer than high in lateral view. First metasomal tergum crescent-shaped and smooth. Second metasomal tergum short and free, 0.4 times as long as the metasomal length and with a dense hair patch anterolaterally. Third metasomal tergum usually with a posterodorsal patch of micropunctures somewhat laterally extended (Fig. 16m), sometimes inconspicuous; not dorsodistally incised. Subsequent terga and hypopygium, punctate. Prominent part of the hypopygial spine about as long as wide and not projected.
Male (Figs 10j, l; 16c, d). Similar to female, except for the following morphological traits: body length 1.3–2.0 mm (n=9). Antennae 15-segmented (5: 4: 7: 8: 8: 7.5: 7: 6.5: 6: 6: 6: 5.5: 5: 5: 7); placodeal sensilla present in all flagellar segments; pedicel about as long as wide; F1 somewhat expanded apically (Fig. 10l). Vertical carinae very short, inconspicuous. Malar space about 0.6 times as long as height of compound eye (Fig. 16c). Third metasomal tergum with a posterior complete narrow band of micropunctures. Wing veins darker and areolet smaller.
Distribution. Mexico. State of Aguascalientes.
Biology. Reared from galls of Sphaeroteras nr pulchripennis (Fig. 18b) and from an undetermined species of Atrusca (Fig. 18m) on Quercus microphylla Née (Quercus section).
description: Published as part of Lobato-Vila, Irene & Pujade-Villar, Juli, 2019, Revision of world Ceroptresini (Hymenoptera: Cynipidae) with the description of a new genus and five new species, pp. 1-67 in Zootaxa 4685 (1) on pages 47-49, DOI: 10.11646/zootaxa.4685.1.1, http://zenodo.org/record/3772829