Dryocosmus Giraud 1859
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: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Cynipidae
Dryocosmus

description: Key to the Western Palaearctic Dryocosmus species
1 Females............................................................................................. 2
- Males............................................................................................. 11
2 Mesoscutellum entirely smooth and glossy or at least the central area of mesoscutellar disc up to the area proximal to the foveae always smooth and glossy; at most a very narrow strip laterally and posteriorly along emarginated edges sculptured....... 3
- Mesoscutellum entirely and uniformly coriaceous or rugose.................................................... 6
3 Scutellar foveae more or less distinct, separated by distinct median carina (Fig. 36)................................. 4
- Scutellar foveae absent, anteriorly only a transverse impression present (Fig. 38)........................... D. tavakolii
4 All metasomal tergites without micropunctures, mesopleuron without striae marking transepisternal line; axillula delicately coriaceous........................................................................................... 5
- All metasomal tergites, except 2nd, with distinct uniform dense micropunctures, mesopleuron with very few delicate indistinct striae marking transepisternal line not surpassing 1/2 of mesopleuron length; axillula strongly sculptured especially at posterior end (Fig. 15); hindwing with narrow infuscate stripe on the anterior margin, starting from hamuli and extending along the margin for more than 3/4 of its length (Fig. 24)................................................. D. destefanii, sexual
5 Pedicel and scape 1.5–1.7 times broader than flagellomeres (Fig. 37); all flagellomeres nearly of the same width; scutellar foveae subtriangular, separated by wide and short median carina, with diverging sides, this short median carina occupies 1/8 of mesoscutellum length (Fig. 36)......................................................... D. destefanii, asexual
- 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. 39); scutellar foveae subquadrangular, separated by distinct narrow median carina with non-diverging sides, this long median carina occupies 1/4 of mesoscutellum length (Fig. 40)...... D. caspiensis
6 Gena not or inconspicuously broadened behind eye, not visible in anterior view.................................... 7
- Gena strongly broadened behind eye, easily visible in anterior view (Fig. 41).................... D. cerriphilus, asexual
7 Entire body reddish brown to light yellowish brown.......................................................... 8
- Entire body black or brownish black...................................................................... 9
8 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. 42)........................................................................................ D. jungalii
9 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. 43)................................................................................................... D. kuriphilus
- All metasomal tergites, including 2nd, without micropunctures; mesoscutellar disk never reaching mesoscutum; broad complete transverse anterior scutellar depression present across mesoscutellum...................................... 10
10 Mesoscutellum distinctly longer than broad, rugose to coriaceous, elongate, sides nearly parallel, 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 anteriorscutellar depression; body usually brown to reddish brown...................................... D. cerriphilus, sexual
11 Body entirely yellow, except dark brown or black head...................................................... 12
- Body black or dark brown............................................................................. 13
12 Mesoscutellum smooth, glossy, without sculpture; head black.......................................... D. jungalii
- Mesoscutellum uniformly coriaceous, head brown..................................................... D. mikoi
13 Mesoscutellar disk alutaceous or very delicately coriaceous; mesopleuron uniformly smooth glossy or delicately alutaceous. .................................................................................................. 14
- Mesoscutellar disk uniformly coriaceous to rugose; mesopleuron smooth glossy, with delicate longitudinal striae in medioanterior part................................................................................... D. cerriphilus
14 Diameter of lateral ocellus about equal to or slightly greater than OOL (Fig. 30); all metasomal tergites, except 2nd, with distinct uniform dense micropunctures; malar space very short, 0.11-0.12 times as long as height of eye (Fig. 28); metasomal petiole longer than wide; hindwing with narrow infuscate stripe on the anterior margin, starting from hamuli and extending along the margin for more than 3/4 of its length (Fig. 29)............................................. D. destefanii
- Diameter of lateral ocellus at least twice OOL; all metasomal tergites without micropunctures; malar space extremely short, 0.06-0.07 times as long as height of eye (Fig. 27); metasomal petiole as long as broad......................... D. mayri
description: Published as part of Cerasa, Giuliano, Verde, Gabriella Lo, Caleca, Virgilio, Massa, Bruno, Nicholls, James A. & Melika, George, 2020, Description of the sexual generation of Dryocosmus destefanii (Hymenoptera: Cynipidae: Cynipini) and disclosure of its life cycle, pp. 359-374 in Zootaxa 4742 (2) on pages 362-363, DOI: 10.11646/zootaxa.4742.2.9, http://zenodo.org/record/3754879