Dicopomorpha, Ogloblin, 1955

Huber, John T., Read, Jennifer D. & Triapitsyn, Serguei V., 2020, Illustrated key to genera and catalogue of Mymaridae (Hymenoptera) in America north of Mexico, Zootaxa 4773 (3), pp. 1-411 : 142-153

DICOPOMORPHA Ogloblin, 1955

( Figs 341–369 )

Dicopomorpha Ogloblin, 1955: 387 . Type species: Dicopomorpha macrocephala Ogloblin, 1955 , by original designation.

Chromodicopus Ogloblin, 1955: 390 . Type species: Chromodicopus pulchricornis Ogloblin, 1955 , by original designation. Synonymy by Yoshimoto, 1990: 27.

Dicopulus Ogloblin, 1955: 377 . Type species: Dicopulus stramineus Ogloblin, 1955 , by original designation. Synonymy by Yoshimoto, 1990: 27.

Diagnosis. Body length 240–425. Funicle 7-segmented with fu 2 shorter than or equal to fu 1 and fu 3 ( Figs 341 , 345 , 352 ); mandibles when closed overlapping medially ( Fig. 350 ), each with 2 small apparently equal teeth; occiput without lines, sulci or carinae except for a median transverse sulcus of variable length ( Figs 343 , 351 ) just above foramen; fore wing behind venation with posterior margin forming an evenly rounded lobe ( Figs 346, 347 ). Male body length 110–140 (2 card-mounted specimens). Body without wings, eyes, ocelli and mouthparts; antenna and tarsi greatly reduced ( Figs 356–359 ). Mockford (1997) recorded body length measurements for 8 slide-mounted specimens as 139–240 μm.

Discussion. Dicopomorpha belongs to the Alaptus group of genera, together with Alaptus , Callodicopus , Dicopus , and Litus . It is most similar to Callodicopus but does not have a thick vertexal trabecula extending transversely across the back of the head. It differs from Dicopus by the mandibles crossing medially when closed, the head ventral to lower eye margin not narrowing so appreciably, and the fore wing wider distal to venation. In the Nearctic, males have never been collected in the wild; the only males known are for the single included species and were laboratory reared from a culture of Psocoptera.

Nearctic hosts. Psocoptera: Lepidopsocidae .

Important references. Huber (2009).

Figures

FIGURE 341. Dicopomorpha sp., habitus. USA, Florida, Alachua Co., Gainesville, 3005 SW 56th Avenue, AEI, 26–30.v.1991, J. Woolley, G. Zolnerowich. Scale bar=500 μm.

FIGURES 342–345. Dicopomorpha sp. 342, head, anterior; 343, head, posterior; 344, head anterior (internal) showing ocular apodeme; the optic sense cells converge to the optic nerve apparently near apex of the apodeme; 345, antenna. Scale bars=100 μm.

FIGURES 346, 347. Dicopomorpha spp. wings. 346, sp. 1; 347, sp. 2. Scale bars=100 μm.

FIGURES 348, 349. Dicopomorpha sp., 348a, mesosoma + metasoma, dorsal; 348b, genitalia seen through gaster); 349a, head–metasoma; lateral; 349b, head lateral (internal) showing ocular apodeme. Scale bars=100 μm.

FIGURES 350–352. Dicopomorpha echmepterygis Mockford, paratype. 350, head, anterior; 351, head, posterior; 352, antenna. Scale bars=100 μm.

FIGURE 353. Dicopomorpha echmepterygis Mockford, paratype, habitus on slide. Scale bar=200 μm.

FIGURES 354, 355. Dicopomorpha echmepterygis Mockford, paratype. 354, mesosoma; 355, metasoma. Scale bars=100 μm.

FIGURES 356, 357. Dicopomorpha echmepterygis Mockford, habitus, male paratype. 356, dorsal; 357, ventral. Scale bars=100 μm.

FIGURES 358–363. Dicopomorpha echmepterygis Mockford, male paratype. 358, habitus, dorsal; 359, habitus, lateral; 360, habitus, dorsoanterior; 361, habitus, ventral; 362, head, anterior; 363, head, lateral. Scale bars=20 μm.

FIGURES 364–369. Dicopomorpha echmepterygis Mockford, male paratype. 364, mesosoma, dorsal; 365, body + coxae, lateral; 366, mesoscutum–propodeum, lateral; 367, metasoma, ventral (apex covered with fungal hyphae and fruiting bodies); 368, apex of tibia + tarsal arolium, lateral; 369, apex of tibia + tarsal arolium, ventral. Scale bars: 364–367=20 μm; 368, 369=10 μm