Striatoandricus Cuesta-Porta & Melika & Nicholls & Stone & Pujade-Villar 2022, new genus
Creators: name: Cuesta-Porta, Víctor
name: Arnedo, Miquel A.
name: Cibrián-Tovar, David
name: Barrera-Ruiz, Uriel M.
name: García-Martiñón, Rosa D.
name: Equihua-Martínez, Armando
name: Estrada-Venegas, Edith G.
name: Clark-Tapia, Ricardo
name: Romero-Range, Silvia
name: Pujade-Villar, Juli
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Cynipidae
Striatoandricus

description: Striatoandricus Pujade-Villar, new genus
(Figs. 1–10)
urn:lsid:zoobank.org:act: 9F4FF2CD-1674-4C63-AE7F-543113BD0C99
Type species: Andricus georgei Pujade-Villar 2011
Etymology: The genus is named after the special sculpture of its metasomal segments and its original assignment of (and morphological similarity to) oak gall wasp genus Andricus.
Gender: Masculine.
Diagnosis: Only asexual females are known. Striatoandricus gen. nov. belongs to the group of genera which the transscutal articulation is present and the asexual females are fully-winged; in addition, the mesoscutum never has transversal carinae neither rugae, the hind femora have no lobe in the posterior margin, the malar sulcus is absent, the ventral spine of the hypopygium is slender without apical tuft, tarsal claws with a basal tooth and metasoma longitudinally carinated. If we do not consider the sculpture of the metasoma, Striatoandricus gen. nov. morphologically resembles Andricus, but in the genus Andricus, the metasoma is smooth, without sculpture.
© 2020 Academia Sinica, Taiwan
In terms of metasomal sculpture, Striatoandricus gen. nov. mostly resembles Kokkocynips with striate and reticulate metasomal tergites. In Striatoandricus gen. nov., tarsal claws with distinct strong basal lobe, prominent part of ventral spine of the hypopygium 1.5– 1.8 times longer than broad, head rounded in front view, nearly as broad as high, length of antennae nearly equal to length of the body, F2 and subsequent flagellomeres thin, long, F1 1.2–1.3 times longer than F2, lateral propodeal carinae curved outwards in the middle, central propodeal area smooth, shiny, lateral propodeal area coriaceous; 2nd metasomal tergite with large and dense patch of setae laterally, striated in the posterior half at least, all subsequent tergites reticulate, induce detachable multilocular or aggregate pubescent leaf galls. In Kokkocynips, tarsal claws are simple, without basal lobe, the prominent part of ventral spine of the hypopygium is 3.0–3.3 times longer than broad, head transverse in frontal view, broader than high, length of antennae nearly equal to length of head + mesosoma, F2 and subsequent flagellomeres are stout, shorter, F1 2.0 times longer than F2, lateral propodeal carinae toward distal part of propodeum gradually curved outwards, central and lateral propodeal areas dull rugose; all tergites uniformly reticulate, 2nd metasomal tergite with sparse lateral hairs, induce rounded detachable soft unilocular twig galls.
The galls are morphologically very similar to Andricus group tecturnarum, but in this case the adults have the metasoma completely smooth and shiny.
Description: Asexual female, body length 1.7–4.0 mm.
Color: Amber usually with black areas variably extended to black. Yellowish legs, last femur dark. Chestnut venation.
Head: Transversally ovoid, 1.2–1.5 as broad as high in frontal view, with gena slightly broadened behind the eye, alutaceous to coriaceous, with sparse white setae. Transfacial distance similar to the height of compound eye. Inner margins of compound eyes parallel. Lower face with irradiating striae from clypeus extending to the eye; malar sulcus absent. Fronts, vertex, and occiput strongly alutaceous to coriaceous, sometimes with some striae; occipital carina absent; postocciput and postgena alutaceous to smooth; posterior tentorial pits small; height of occipital and oral foramen similar to height of postgenal bridge; hypostomal carina emarginated (Fig. 1a); gular sulcus inconspicuous. Maxillary palps 5-segmented and labial palps 3-segmented (Fig. 1a). Antenna short, longer than head + mesosoma, with 11–13 flagellomeres, being F1 equal or longer than F2.
Mesosoma: Pronotum impressed along anterior margin, delicately coriaceous dorsally and laterally, almost smooth or with some transversal carinae (Fig. 1b–e); propleuron sculptured, alutaceous to coriaceous, with sparse setae. Mesoscutum coriaceous, usually without carinae or rugae; as long as broad or slightly longer than broad (greatest width measured across mesoscutum level with base of tegulae). Notauli present, complete or incomplete; parapsidal lines present sculptured; median mesoscutal line absent or not; anterior parallel lines distinct and sculptured; parascutal carina broad, extending to 2/3 of mesoscutum length. Mesoscutellum rounded, as broad as long or slightly longer, pubescent, alutaceous to coriaceous, rugose at least laterally, overhanging metanotum, not margined. Scutellar foveae transverse, separated. Mesopleuron alutaceous, with carinae or rugae. Dorsal axillar area alutaceous, with white setae; lateral axillar area alutaceous, with few setae; subaxillular bar smooth, glabrous, triangular, posteriorly as high as long; metapleural sulcus reaching mesopleuron at half of its height at least. Metascutellum coriaceous, rectangular, ventrally concave, glabrous ventral impressed area; metanotal trough smooth, pubescent or not; central propodeal area smooth and glabrous, without longitudinal central carina; lateral propodeal carinae curved; lateral propodeal area with dense setae without piliferous points. Nucha with longitudinal carinae.
Legs: All tarsal claws with strong basal lobe.
Forewing: longer than body, hyaline, pubescent, ciliated on margin, veins conspicuous, radial cell 3–4 times as long as broad, open; areolet triangular, closed and distinct; Rs + M not reaching basalis, its projection reaching basalis at half its length.
Metasoma: Slightly longer than mesosoma, slightly longer than high in lateral view. Length of 2nd metasomal tergite equal to half or 2/3 of metasoma’s total length, with lateral setae, striated or partially striated and reticulated; subsequent tergites shorter, sculptured, striated and/or reticulated. Ventral spine of hypopygium needle-like, prominent part of ventral spine of hypopygium short, at most 4.0 times as long as broad from ventral view, with sparse setae, extending beyond apex of spine without forming a tuft.
Galls: Located in the lower part of the central vein of the leaf, in the upper part, or in the branches. It appears as a globose structure with long and dense pubescence without being brittle. They are yellowish, brown, sometimes purple or violet pink. The pubescence completely covers the larval chambers, which are fused or individualized but together, in a variable number between 3 and 30; each individual gall is cylindrical, light brown in color, with a thick hard wall, from which the pubescence emerges. Host belongs to Quercus section.
© 2020 Academia Sinica, Taiwan
Three species belong to this genus: Striatoandricus nievesaldreyi n. comb. and S georgei n. comb from México, and S. maesi n. comb. from Nicaragua. Two new species are also described here from México.
The species can be distinguished according to the following key:
1. Notauli incomplete, faint in anterior part of mesoscutum. Pronotum smooth or finely striated on lateral part (Fig. 1d–e) .. 2
- Notauli percurrent, distinctly marked along all the mesoscutum. Pronotum conspicuously striated (Fig. 1b–c)............................. 3
2. Posterior medial sulcus present (Fig. 8d). F1 subequal in length to F2 (Fig. 8a); antenna with 13 flagellomeres (Fig. 8a). Striations in first metasomal tergite interrupted with some irregular smooth areas (Fig. 9a–b) ................................................ S. sanchezi n. sp.
- Medial sulcus absent (Fig. 3 c–d). F1 at least 1.2x F2 (Fig. 3e); antenna with 12 flagellomeres sometimes with a partial sulcus between F12 and F13 (Fig. 3f). Striations non-interrupted (Fig. 2c), sometimes with a small smooth dorsal area .......... S. georgei
3. Second metasomal tergite fundamentally areolated-reticulated (Fig. 2a), sometimes with striations very weak. Body color always dark................................................................................. 4
- Second metasomal tergite striated (Fig. 2b). Body color usually amber with or without black marks, rarely black ....................... 5
4. Body length (3.5–4.0 mm)*. Antenna with 12 flagellomeres. Front rugose (Fig. 2c). OOL and LOL shorter than diameter ocelli (Fig. 2c). Mesoscutum longer than wide with some linear elements (Fig. 2d). Big galls in twigs.............................. S. maesi
- Body length (1.7–2.0 mm). Antenna with 11 flagellomeres (Fig. 4e). Front coriaceous (Fig. 4c). OOL and LOL longer than diameter ocelli (Fig. 4c). Mesoscutum as long as wide, uniformly coriaceous sculpture without linear elements (Fig. 5a). Small galls in leaves ..................................................... S. cuixarti n. sp.
5. Second metasomal tergite completely sculptured, without smooth dorso-lateral area; with longitudinal striae strong. Mesoscutum longer than broad. Dorsal area of mesopleuron weakly sculptured to smooth. Forewing venation highly pigmented; Rs + M vein conspicuously connected to lower half of basal vein .. S. barriosi
- Second metasomal tergite usually with a dorso-lateral area smooth and shiny; longitudinal striae weak, slightly marked and incomplete, usually not reaching margin of metasomal tergite. Mesoscutum as long as broad. Mesopleuron entirely sculptured. Forewing with brown veins, not highly pigmented; Rs + M vein not connected to basal vein ................................. S. nievesaldreyi *In the original description the body length of Andricus maesi is wrong.
description: Published as part of Cuesta-Porta, Víctor, Arnedo, Miquel A., Cibrián-Tovar, David, Barrera-Ruiz, Uriel M., García-Martiñón, Rosa D., Equihua-Martínez, Armando, Estrada-Venegas, Edith G., Clark-Tapia, Ricardo, Romero-Range, Silvia & Pujade-Villar, Juli, 2020, A New Genus of Oak Gall Wasp, Striatoandricus Pujade-Villar (Hymenoptera: Cynipidae: Cynipini) from America with Descriptions of Two New Mexican Species, pp. 1-21 in Zoological Studies (Zool. Stud.) (Zool. Stud.) 59 (8) on pages 3-5, DOI: 10.6620/ZS.2020.59-08, http://zenodo.org/record/8069104