Orasema festiva

Burks, Roger A., Mottern, Jason & Heraty, John M., 2015, Revision of the Orasema festiva species group (Hymenoptera: Chalcidoidea: Eucharitidae), Zootaxa 3972 (4), pp. 521-534 : 523

Key to species of the Orasema festiva group

Males are unknown for O. alvarengai , O. festiva , and O. reburra , but based on the other species features appear to be valid for both sexes.

1. Eye with long setae ( Fig. 7 )......................................................... Orasema caesariata n. sp.

- Eye without visible setae at 50× magnification ( Figs 3 , 11 , 18 , 22 , 27 )............................................ 2

2. Coxae dark brown ( Figs 26, 29 ). Petiole with many (>10) long setae ( Fig. 29 ).................... Orasema reburra n. sp.

- Coxae yellow ( Figs 2, 5 , 12 , 21 , 24 ). Petiole bare ( Figs 5 , 14 , 21 , 24 ), or with few (<5) very tiny decumbent setae are not easily visible at 50x magnification ( Fig. 5 )....................................................................... 3

3. Petiole parallel-sided in dorsal view, smooth and without a dorsal longitudinal carina ( Fig. 24 ).... Orasema festiva (Fabricius)

- Petiole laterally expanded near midlength, with some dorsal sculpture and/or dorsal longitudinal carina ( Figs 5 , 14 , 21 ).....4

4. Petiole only slightly laterally expanded near midlength: at least 3.5× as long as broad in both sexes ( Fig. 21 )................................................................................................. Orasema erwini n. sp.

- Petiole more strongly laterally expanded near midlength: not more than 2.8× as long as broad in females ( Figs 5 , 14 ), 3.27× as long as broad in males.................................................................................. 5

Figures

FIGURES 7 – 10. Orasema caesariata. 7 – 9, paratype female (UCRCENT 00322671): 7, head, anterior; 8, mesosoma, dorsal; 9, mesosoma, lateral. 10, holotype female (UCRCENT 00417462): petiole, dorsal.

FIGURES 2 – 6. Orasema alvarengai. Holotype female (UCRCENT 00320756): 2, habitus, lateral; 3, head, anterior; 4, mesosoma, dorsal; 5, petiole, dorsal; 6, wings, dorsal. lbr = labrum, lg = longitudinal groove, lpc = lateral petiolar carina, mlm = mesoscutal midlobe, pmv = postmarginal vein.

FIGURES 11 – 16. Orasema delicatula. 11 and 12, female (UCRCENT 00320759): 11, head, anterior; 12, mesosoma, lateral. 13, female (UCRCENT 00239436): mesosoma, dorsal. 14, female (UCRCENT 00408490): petiole, dorsal. 15 and 16, female (UCRCENT 00239436): 15, ovipositor, dorsal. 16; ovipositor, lateral. adv = annuli of dorsal valvula, dpc = dorsal longitudinal petiolar carina, dv = dorsal (2 nd) valvula, hyp = hypopygium, tvv = ovipositor teeth of ventral valvula, vv = ventral (1 st) valvula.

FIGURES 18 – 21. Orasema erwini. 18 and 19, paratype female (UCRCENT 00092209): 18, head, anterior; 19, mesosoma, lateral. 20 and 21, holotype female (UCRCENT 00320683): 20, mesosoma, dorsal; 21, petiole, dorsal.

FIGURES 22 – 25. Orasema festiva. Female (UCRCENT 00417464): 22, head, anterior; 23, mesosoma, dorsal; 24, petiole, dorsal; 25, metasoma, ventral, acs = antecostal sulcus.

FIGURES 26 – 29. Orasema reburra. 26 – 28, holotype female (UCRCENT 00316397): 26, habitus, lateral; 27, head, anterior; 28, mesosoma, dorsal. 29, paratype female (UCRCENT 00092181): petiole, dorsal.