Oreiscelio, Kieffer, 1910

Talamas, Elijah, Johnson, Norman, van Noort, Simon, Masner, Lubomir & Polaszek, Andrew, 2009, Revision of world species of the genus Oreiscelio Kieffer (Hymenoptera, Platygastroidea, Platygastridae), ZooKeys 6 (6), pp. 1-68 : 6-14

Key to species of Oreiscelio 11

Females

1 Outer propodeal projection reduced, distinctly shorter than inner projection, posterior margin of propodeal shelf strongly oblique (Figs 92, 94); mesoscutellum depressed posteriorly, in lateral view posterior margin of mesoscutellum not projecting beyond upper margin of metanotum (Figs 91, 93).. .......................................................... Oreiscelio paradoxus Talamas , sp. n.

– Outer propodeal angle well-developed, subequal in length to inner projection, posterior margin of propodeal shelf more or less transverse, sometimes medially excised (Figs 36, 76, 100, 124); mesoscutellum variable, in lateral view posterior margin of mesoscutellum often extending beyond upper margin of metanotum ( Figs 39 , 51 , 57 , 69 , 81 , 87 , 105, 135) .......................... 2

2 Apex of fore wing extending well beyond apex of T6 by at least twice the length of T6 ( Figs 67, 68, 72 ); antennal clava large ( Fig. 71 ); preocellar pit present, large (as in Fig. 17); A1 dark brown, A2–A6 yellow, A7–A12 dark brown ( Fig. 71 ) ............................. Oreiscelio magnipennis Talamas , sp. n.

– Apex of fore wing ending approximately at or before apex of metasoma ( Figs 37, 38 , 103, 109, 120), if apex of fore wing distinctly extending beyond the apex of T6, then preocellar pit absent (as in Fig. 16); other features variable................ 3

3 Interantennal process with dorsal flange (Figs 129, 131, 132); lateral mesoscutum areolate throughout (Fig. 130); parapsidal line and notaulus absent (Fig. 130); femoral depression foveate to weakly transversely striate (Fig. 129) ..... ........................................................... Oreiscelio zulu Talamas & Polaszek

– Interantennal process simple (Figs 35, 41, 77, 89, 107, 113, 119, 137) or with laterally divergent carinae ( Figs 29 , 47 , 53 , 59 , 71 , 125) but without dorsal flange; if dorsal flange present (Figs 63, 65, 99, 101) then lateral mesoscutum with broad smooth area (Fig.100) or femoral depression entirely smooth (Fig. 63); parapsidal line and notaulus variable............................... 4

4 Apical spine on S6 visible in dorsal view, spine extending beyond apex of T6 ( Figs 42 , 44 , 56 , 66, 74, 84, 108, 122) ...................................................... 5

– Apical spine on S6 not visible in dorsal view, not extending beyond the apex of T6, spine small or absent ( Figs 30 , 36, 114, 134) ................................. 13

5 Ventral tooth of mandible distinctly longer and wider than dorsal tooth, length at least 3 times as long as dorsal tooth; width 2 times width of dorsal tooth ( Figs 77, 78 , 83 , 125)........................................................................ 6

– Ventral tooth of mandible slightly larger than dorsal tooth or teeth equal in size ( Figs 11 , 59, 65, 107, as in Fig. 71 ) ..................................................... 8

6 Interantennal process extended dorsolaterally into a pair of well-developed, divergent carinae (Fig. 125); parapsidal lines inconspicuous amid mesoscutal sculpture (Fig. 124)............................................... Oreiscelio turneri Nixon

– Interantennal process simple, not extending into carinae dorsally ( Figs 77, 78 , 83 ); parapsidal lines distinct ( Figs 76 , 82 ) ............................................ 7

7 Posterior margin of propodeal shelf between inner and outer propodeal projections concave ( Fig. 84 ); preocellar pit present (as in Figs 15, 18); antennal scape yellow ( Fig. 83 ); legs bright yellow ( Figs 79, 81 ) ................................. ........................................................ Oreiscelio megadontus Talamas , sp. n.

– Posterior margin of propodeal shelf between inner and outer propodeal projections nearly straight ( Fig. 76 ); preocellar pit absent (as in Fig. 16); antennal scape brown ( Figs 77, 78 ); legs pale brown becoming lighter apically ( Fig. 73 ) ...................................... Oreiscelio majikununuensis van Noort , sp. n.

8 Mesopleural depression smooth (Fig. 63); ventral mesepisternum and ventral portion of metapleuron smooth (Fig. 63); interantennal process developed into a conspicuous dorsal process (Fig. 63); sculpture of T2–T3 highly reduced (Fig. 66) ....................................... Oreiscelio iommii Talamas , sp. n.

– Mesopleural depression longitudinally striate in posterior half, often with foveae ( Figs 45 , 57 , 105, 123); ventral mesepisternum and ventral metapleuron with at least some reticulate sculpture ( Figs 39 , 45 , 57 , 105); interantennal process without conspicuous dorsal process ( Figs 39 , 57 , 105); sculpture of T2–T3 reticulate rugose or longitudinally strigose ( Figs 44 , 56 ) ............. 9

9 Sublateral tergal carina on T2 present in at least apical half ( Fig. 60 ); setae of head and dorsal mesosoma brown ( Fig. 57, 59 ); wings slightly infuscate throughout ( Figs 55, 60 ); submarginal ridge on T1 uninterrupted and

clearly separate from marginal carina (as in Fig. 54 ); ventral mandibular tooth slightly larger than dorsal tooth ....................................................... ............................................ Oreiscelio gryphus Talamas & Johnson , sp. n.

– Sublateral tergal carina on T2 absent (as in Fig. 86 ); if carina present then setae of head and dorsal mesosoma white or pale yellow ( Figs 39, 41 , 45, 47 ,

51, 53 , 105, 107) and wings entirely hyaline (as in Figs 81, 82 , 85 ); other characters variable..................................................................................... 10

10 Subapical margin of T6 strongly concave ( Fig. 42 ); antennae light brown (Figs 16, 37); sculpture of dorsal frons effaced medially (Fig. 16).................. ............................................. Oreiscelio badius Talamas & Johnson , sp. n.

– Subapical margin of T6 straight or weakly emarginate ( Figs 44 , 108); antennae variable but not uniformly light brown ( Figs 43 , 49 , 103); sculpture of dorsal frons coarse throughout (Fig. 17, as in Figs 13-15, 18) .................. 11

11 Sculpture of ventral gena posterior to genal carina smooth or with sparse fine setigerous punctures (Fig. 104); dorsal frons areolate or transversely rugose (Figs 13, 14); sculpture of mesoscutum areolate to longitudinally strigose, often effaced (Fig. 106); submarginal ridge on T1 rarely present and never extending the length of T1 (Fig. 4) ................ Oreiscelio rugosus Sundholm

– Sculpture of ventral gena posterior to genal carina areolate or coarsely punctate (as in Figs 1, 2); dorsal frons foveate to areolate (Fig. 17, as in Fig. 15); mesoscutum areolate, often with pronounced longitudinal elements ( Figs 46 , 52 ); submarginal ridge on T1 usually present and extending the length of T1 ( Fig. 54 ).................................................................................................... 12

12 Carinae on interantennal process weakly developed, not diverging laterally on surface of frons ( Fig. 53 ); pronotal cervical sulcus deeply impressed with large pit at anterior end, sulcus always reaching posterior margin of pronotum and usually smoothly excavated ( Fig. 7 ); metascutellar spines well separated from each other with distinct emargination between them; cells of paracoxal and metapleural sulci often large or irregular ( Fig. 51 ) ..... Oreiscelio cultrarius Talamas , sp. n.

– Divergent carinae on frons arising from interantennal process well-developed ( Fig. 47 ); pronotal cervical sulcus often poorly defined or not reaching posterior margin of pronotum (as in Fig. 8); metascutellar spines variable; cells of paracoxal and metapleural sulci of average size ( Fig. 45 )................................ ......................................... Oreiscelio coracinus Talamas & Johnson , sp. n.

13 Width of T6 along anterior margin less than 3 times its medial length, subapical margin straight ( Fig. 30 ); interantennal process with divergent carinae ( Fig. 29 )................................................ Oreiscelio aequalis Talamas , sp. n.

– Width of T6 along anterior margin more than 3 times its medial length (Figs 36, 98, 116, 128) or subapical margin convex (Fig. 114); interantennal process without divergent carinae (Figs 35, 101, 113, 119, 131) ..................... 14

14 Posterior margin of mesoscutellum deeply notched (Figs 118, 130); mesoscutellum with distinct median longitudinal furrow reaching from the posterior margin to scutoscutellar sulcus, rarely with shallow median indentation (Figs 118, 130); ventral mandibular tooth equal to or larger than dorsal tooth in length and width (Figs 119, 131).......................................................... 15

– Posterior margin of mesoscutellum convex or broadly emarginate (Figs 34, 88, 100, 112); mesoscutellum convex or with a shallow median longitudinal indentation (Figs 34, 88, 100, 112); ventral mandibular tooth equal to or smaller than dorsal tooth in length and width (Figs 12, 35, 113) .............. 16

15 S3–S4 with fine setigerous punctures, but otherwise devoid of sculpture (Fig. 120); sculpture of lateral mesoscutum between parapsidal lines and lateral margin with narrow, elongate smooth area (Fig. 118) ................................... ...................................................................... Oreiscelio sechellensis Kieffer

– S3–S4 with longitudinally reticulate sculpture throughout (Fig. 138); sculpture of lateral mesoscutum between parapsidal lines and lateral margin somewhat confused, but not smooth (Fig. 136) .................................................... ............................................. Oreiscelio zuzkae Talamas & Johnson , sp. n.

16 T2–T3 longitudinally striate, sometimes with rugulose interstices (Figs 98, 114).......................................................................................................... 17

– T2–T3 evenly reticulate rugose (Fig. 36) .................................................. 18

17 Subapical margin of T6 convex in dorsal view (Fig. 114); S1 simple, if median keel present, then very small and not extending to posterior margin (Fig. 109).................................................... Oreiscelio scapularis Talamas , sp. n.

– Subapical margin of T6 straight or emarginate in dorsal view (Fig. 98); S1 with median keel extending throughout length of sclerite (Fig. 102)............. ........................................... Oreiscelio rostratus Talamas & Masner , sp. n.

18 Preocellar pit present (Fig. 15) or indicated by a small round depression (as in Fig. 14); anterior pit of the pronotum large ( Fig. 9 ); posterior margin of ventral pronotum with percurrent sulcus ( Fig. 9 ); S1 with thin, straight median keel (Fig. 31); ventral cell of metapleural triangle with at most 3 very small setae ( Fig. 6 ); lateral region of tergites rarely with faint corbiculate sculpture inside cells........................................................ Oreiscelio alluaudi (Risbec)

– Preocellar pit absent (as in Fig. 16); anterior pit of the pronotum small (Fig 10); posterior margin of ventral pronotum without percurrent sulcus (Fig. 10); S1 simple, without median keel ( Fig. 86 ); ventral cell of metapleural triangle almost always with many small white setae (as in Fig. 5); lateral region of tergites usually with dense corbiculate microsculpture ( Fig. 86 ) ................ ............................................. Oreiscelio naevus Talamas & Johnson , sp. n.

Males

(unknown for O. aequalis , O. cultrarius , O. gryphus , O. iomii , O. magnipennis , O. megadontus , O. majikununuensis , O. paradoxus and O. zuzkae )

1 T2–T3 with prominent longitudinal striae (Figs 21, 22); T2 with well-defined sublateral tergal carina (as in Fig. 60 ); lateral mesoscutum with glabrous smooth area that extends posteriorly to scutoscutellar sulcus (Figs 100, 112); metasoma elongate, length at least 2.5 times width..................................... 2

– T2–T3 with reticulate sculpture (Figs 19, 20, 24); T2 sometimes with sublateral tergal carina; lateral mesoscutum sometimes with smooth area containing fissures or colliculate microsculpture, smooth area sometimes extends posteriorly to scutoscutellar sulcus (Figs 34, 40, 88, 90); metasoma length variable....................................................................................................... 3

2 Interantennal process developed dorsally into an oblong lobe, separated from lower portion by shallow notch (Fig. 99); width of T6 along apical margin more than 2.5 times its maximum length (Fig. 22); sculpture of T6 reticulate rugose (Fig. 22)................... Oreiscelio rostratus Talamas & Masner , sp. n.

– Interantennal process not developed dorsally into an oblong lobe (Fig. 111); width of T6 along apical margin less than 2 times its maximum length (Fig. 21); sculpture of T6 uniformly punctate (Fig. 21).... Oreiscelio scapularis Talamas , sp. n.

3 Apex of T7 bispinose (Fig. 19); interantennal process dorsolaterally diverging into two distinct carinae along surface of frons ( Figs 47 , 125) .................... 4

– Apex of T7 straight, convex, or emarginate with small points laterally (Figs 20, 23, 24); interantennal process variable, if dorsolaterally divergent carinae present, then very faint (Figs 35, 41, 89, 107, 119) .................................... 5

4 Ventral mandibular tooth 2 times as large as dorsal tooth (Fig. 126); submarginal ridge on T1 usually irregular ( Fig. 3 ) or absent ........ Oreiscelio turneri Nixon

– Ventral mandibular tooth less than 2 times larger than dorsal tooth (as in Fig.137) or teeth equal in size ( Fig. 11 ); submarginal ridge on T1 smooth and well defined, rarely irregular (as in Fig. 54 ) .................................................. ......................................... Oreiscelio coracinus Talamas & Johnson , sp. n.

5 Posterior margin of mesoscutellum deeply notched (Fig. 118, as in Fig. 136); mesoscutellum with distinct median longitudinal furrow reaching from the posterior margin to scutoscutellar sulcus (Fig. 118, as in Fig. 130); T1 submarginal ridge clearly separated from marginal carina for the length of T1 (as in Fig. 54 ); posterior margin of T7 emarginate (Fig. 23); S3–S4 with fine setigerous punctures, but otherwise smooth (Fig. 23) .................. ...................................................................... Oreiscelio sechellensis Kieffer

– Posterior margin of mesoscutellum emarginate to convex (Figs 34, 88); mesoscutellum sometimes with a shallow indentation, but without a distinct longitudinal furrow reaching the anterior margin (Figs 34, 88); T1 submarginal ridge at most present in apical half of T1 (as in Fig. 4); posterior margin of T7 straight or slightly convex (Figs 20, 24); sculpture of S3–S4 variable............................................................................................ 6

6 Sculpture of ventral gena posterior to genal carina smooth, sometimes with sparse fine setigerous punctures (Fig. 104) .......... Oreisceio rugosus Sundholm

– Sculpture of ventral gena posterior to genal carina areolate (as in Fig. 2) or with large setigerous punctures (Fig. 1) ...................................................... 7

7 Apex of T7 with small rounded points laterally (Fig. 20); posterior margin of propodeal shelf between inner and outer propodeal projections nearly straight (Fig. 20); sculpture of dorsal frons effaced medially (Fig. 16) ....................... ............................................. Oreiscelio badius Talamas & Johnson , sp. n.

– Apex of T7 without small rounded points laterally (Fig. 24); posterior margin of propodeal shelf between inner and outer propodeal projections concave (Fig. 24, as in Figs 21, 22); sculpture of dorsal frons uniform throughout (Fig. 15, as in Figs 17, 18)................................................................................... 8

8 Ventral mespisternum coarsely foveate; metasomal tergites laterally without dense corbiculate microsculpture; metapleural cell glabrous or with one or two setae ( Fig. 6 ); S1 with thin, straight longitudinal medial keel in lateral view (Fig. 31); notaulus indicated by lines of deeper sculpture (Fig. 34); T2 with sublateral tergal carina (as in Fig. 60 ) .......................... ........................................................................ Oreiscelio alluaudi (Risbec)

– Ventral mespisternum mostly to entirely smooth; metasomal tergites laterally usually with dense microsculpture; metapleural cell setose (as in Fig. 5); S1 without longitudinal medial keel in lateral view ( Fig. 86 ); notaulus absent or weakly indicated by lines of deeper sculpture ( Fig. 88 ); T2 usually without sublateral tergal carina ................................................ ............................................. Oreiscelio naevus Talamas & Johnson , sp. n.

Figures

Figures 3Ι-36.91 Oreiscelio alluaudi (Risbec). 31, Lateral habitus, female (CASENT 2042833); 32, Dorsal habitus, female (CASENT 2042833); 33, Head and mesosoma, lateral view, female (CASENT 2042833); 34, Head and mesosoma, dorsal view, female (CASENT 2042833); 35, Head, anterior view, female (CASENT 2042921); 36, Metasoma, dorsal view, female (CASENT 2042833). Scale bars in millimeters.

Figures 7-Ι2.87 7, Oreiscelio cultrarius sp. n., pronotum, ventrolateral view, female (OSUC 234309). 8, Oreiscelio badius sp. n., pronotum, ventrolateral view, female (OSUC 171165); 9, Oreiscelio alluaudi (Risbec), pronotum, ventrolateral view, female (CASENT 2042983); 10, Oreiscelio naevus sp. n., pronotum, ventrolateral view, female (CASENT 2133408); 11, Oreiscelio coracinus sp. n., mandibles, ventral view, female (OSUC 234362); 12, Oreiscelio rostratus sp. n., mandibles, ventral view, female (CASENT 2043322). Scale bars in millimeters.

Figures 37-42.92 Oreiscelio badius sp. n. 37, Lateral habitus, holotype female (OSUC 171169); 38, Dorsal habitus; holotype female (OSUC 171169); 39, Head and mesosoma, lateral view, holotype female (OSUC 171169); 40, Head and mesosoma, dorsal view; 41, Head, anterior view, holotype female (OSUC 171169); 42, T5 and T6, dorsal view, female (OSUC 164329).

Figures 49-54.94 Oreiscelio cultrarius, sp. n. 49, Lateral habitus, female holotype (OSUC 233760); 50, Dorsal habitus, female (OSUC 233758); 51, Head and mesosoma, lateral view, female (OSUC 233758); 52, Head and mesosoma, dorsal view, female (OSUC 233758); 53, Head, anterior view, female (OSUC 234309); 54, T1, ventrolateral view, female (OSUC 234309). Scale bars in millimeters.

Figures 55-60.95 Oreiscelio gryphus, sp. n. 55, Lateral habitus, female holotype (OSUC 207591); 56, Dorsal habitus, female holotype (OSUC 207591); 57, Head and mesosoma, lateral view, female holotype (OSUC 207591); 58. Head and mesosoma, dorsal view, female holotype (OSUC 207591); 59, Head, anterior view, female (OSUC 207590); 60. T1–T2, lateral view, female (OSUC 186302). Scale bars in millimeters.

Figures 67-72.97 Oreiscelio magnipennis, sp. n., female holotype (OSUC 234222). 67, Lateral habitus; 68, Dorsal habitus; 69, Head and mesosoma, lateral view; 70, Head and mesosoma dorsal view; 71, Head, anterior view; 72, Ventral habitus. Scale bars in millimeters.

Figures 79-84.99 Oreiscelio megadontus, sp. n., female holotype (OSUC 212512). 79, Lateral habitus; 80, Dorsal habitus; 81, Head and mesosoma, lateral view; 82, Head and mesosoma, dorsal view; 83, Head, anterior view; 84, Metasoma, dorsal view. Scale bars in millimeters.

Figures 85-90.100 Oreiscelio naevus, sp. n. 85, 87-89, female holotype (CASENT 2042958). 85, Lateral habitus, female holotype (CASENT 2042958); 86, Metasoma, lateral view, female (CASENT 2042884); 87, Head and mesosoma, lateral view, female holotype (CASENT 2042958); 88, Head and mesosoma, dorsal view, female holotype (CASENT 2042958); 89, Head, anterior view, female holotype (CASENT 2042958); 90, Mesosoma, dorsolateral view, female (CASENT 2043702). Scale bars in millimeters.

Figures 25-30.90 Oreiscelio aequalis, sp. n., female holotype (OSUC 211416). 25, Lateral habitus; 26, Dorsal habitus; 27, Head and mesosoma, lateral view; 28, Head and mesosoma, dorsal view; 29, Head, anterior view; 30, T5 and T6, dorsal view. Scale bars in millimeters.

Figures 43-48.93 Oreiscelio coracinus, sp. n. 43, Lateral habitus, female holotype (OSUC 234401); 44, Dorsal metasoma, female holotype (OSUC 234401); 45, Head and mesosoma, lateral view, female holotype (OSUC 234401); 46, Head and mesosoma dorsal view, female holotype (OSUC 234401); 47, Head, anterior view, female (OSUC 233791); 48, Head, ventrolateral view, male (OSUC 234339). Scale bars in millimeters.

Figures 73-78.98 Oreiscelio majikununuensis, sp. n. 78, female holotype (SAM–HYM–P020051). 73, Lateral habitus, female holotype (SAM–HYM–P020051); 74, Dorsal habitus, female holotype (SAM– HYM–P020051); 75, Head and mesosoma, lateral view, female holotype (SAM–HYM–P020051); 76, Head and mesosoma dorsal view, female holotype (SAM–HYM–P020051); 77, Head, anterior view, female (OSUC 233761). 78, Head, anteroventral view, female holotype (SAM–HYM–P020051). Scale bars in millimeters

Figures 115-120.105 Oreiscelio sechellensis Kieffer. 115, Lateral habitus, female (OSUC 207594); 116, Dorsal habitus, female (OSUC 207594); 117, Head and mesosoma, lateral view, female (OSUC 207594); 118, Head and mesosoma, dorsal view, female (OSUC 207594); 119, Head, anterior view, female (OSUC 234298); 120, Metasoma, ventral view, female (OSUC 234301). Scale bars in millimeters.

Figures 91-96.101 Oreiscelio paradoxus, sp. n., female holotype (OSUC 234365). 91, Lateral habitus; 92, Dorsal habitus; 93, Head and mesosoma, lateral view; 94, Head and mesosoma, dorsal view; 95, Head, anterior view; 96, Metasoma, dorsal view. Scale bars in millimeters.

Figures 61-66.96 Oreiscelio iommii, sp. n., female holotype (OSUC 233703). 61, Lateral habitus; 62, Dorsal habitus; 63, Head and mesosoma, lateral view; 64, Head and mesosoma dorsal view; 65, Head, anterior view; 66, Metasoma, dorsal view. Scale bars in millimeters.