Dryocosmus
Creators: name: Cerasa, Giuliano
name: Verde, Gabriella Lo
name: Caleca, Virgilio
name: Massa, Bruno
name: Nicholls, James A.
name: Melika, George
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Cynipidae
Dryocosmus

description: Key to the Western Palaearctic Dryocosmus species
1 Females ............................................................................................. 2
- Males.............................................................................................. 10
2 Mesoscutellum entirely smooth, glossy; at most a very narrow strip laterally and posteriorly along emarginated edges sculp- tured; disk of mesoscutellum always smooth, glossy.......................................................... 3
- Mesoscutellum entirely and uniformly coriaceous or rugose.................................................... 5
3 Scutellar foveae more or less distinct, separated by distinct median carina (Fig. 16)................................. 4
- Scutellar foveae absent, anteriorly only a transverse impression present (Fig. 32).......................... D. tavakolii
4 Pedicel and scape 1.5–1.7 times broader than flagellomeres (Fig. 15); all flagellomeres nearly of the same width; scutellar foveae subtriangular, separated by median carina wider and shorter, with diverging sides, this short median carina occupies 1/8 of mesoscutellum length (Fig. 16).......................................................... D. destefanii n. sp.
- Pedicel and scape at least 2.2–2.5 times broader than flagellomeres; flagellomeres towards the apex broadened, F8–F12 at least 2.0 times as broad as preceding flagellomeres (Fig. 30); scutellar foveae subquadrangular, separated by distinct narrow median carina with non diverging sides, this long median carina occupies 1/4 of mesoscutellum length (Fig. 31)...... D. caspiensis
5 Gena not or inconspicuously broadened behind eye, not visible in anterior view................................... 6
- Gena strongly broadened behind eye, easily visible in anterior view (Fig. 33).................... D. cerriphilus, asexual
6 Entire body reddish brown to light yellowish brown......................................................... 7
- Entire body black or brownish black...................................................................... 8
7 Eye large, silvery, transfacial distance nearly equal to height of eye, body uniformly light brown to yellowish..... D. mikoi
- Eye small, black, transfacial distance longer than height of eye; head and mesosoma reddish brown, metasoma darker (Fig. 34)............................................................................................ D. jungalii
8 All metasomal tergites, except 2nd, with distinct uniform dense micropunctures; mesoscutellar disk reaching mesoscutum in the center, very narrow anterior scutellar depression present only on both sides of this attachment point (Fig. 35)................................................................................................... D. kuriphilus
- All metasomal tergites, including 2nd, without micropunctures; mesoscutellar disk never reaching mesoscutum; broad com- plete transverse anterior scutellar depression present across mesoscutellum....................................... 9
9 Mesoscutellum distinctly longer than broad, rugose to coriaceous, elongate, with nearly parallel sides, with narrow median carina reaching mesoscutum and dividing medially smooth glossy broad anterior scutellar depression; body usually black or dark brown.................................................................................... D. mayri
- Mesoscutellum as long as broad or only slightly longer than broad, dull rugose, without median carina, with rugose anterior
scutellar depression; body usually brown to reddish brown.................................... D. cerriphilus, sexual 10 Body entirely yellow, except dark brown or black head..................................................... 11
- Body black or dark brown............................................................................. 12
11 Mesoscutellum smooth, glossy, without sculpture; head black......................................... D. jungalii
- Mesoscutellum uniformly coriaceous, head brown...................................................... D. mikoi
12 Diameter of lateral ocellus more than distance between ocellus and margin of eye; mesopleuron uniformly smooth glossy or delicately alutaceous; mesoscutellar disk alutaceous or very delicately coriaceous............................ D. mayri
- Diameter of lateral ocellus less than distance between ocellus and margin of eye; mesopleuron smooth glossy, with delicate longitudinal striae in medioanterior part; mesoscutellar disk uniformly coriaceous to rugose............... D. cerriphilus
description: Published as part of Cerasa, Giuliano, Verde, Gabriella Lo, Caleca, Virgilio, Massa, Bruno, Nicholls, James A. & Melika, George, 2018, Description of Dryocosmus destefanii new species (Hymenoptera: Cynipidae: Cynipini) from Quercus suber L. in Italy, pp. 535-548 in Zootaxa 4370 (5) on pages 537-538, DOI: 10.11646/zootaxa.4370.5.5, http://zenodo.org/record/1147345