Advances in Ephemeroptera Biology by D. Dudley Williams (auth.), John F. Flannagan, K. Eric

By D. Dudley Williams (auth.), John F. Flannagan, K. Eric Marshall (eds.)

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OboriphZebia quarta Hubbard & Kukalova-Peck. NEW SPECIES. Protereisma sp. (nymph no. 4) Kukalova, 1968:318, fig. 5. , 1arve no. 4 Demoulin, 1970:7. OboriphZebia quinta Hubbard & Kuka1ova-Peck. NEW SPECIES Protereisma sp. (nymph no. 5) Kukalova, 1968:318, fig. 6. , 1arve no. 5 Demoulin, 1970:7. 30 NICHAEL D. HlLA KUKALOVA-PECK Oboriphlebia (named for Obora in Noravia), for which the family Oboriphlebiidae is established. Nymphs nos. 3, 4, and 5 of Kukalova (1968) are named as new species in Oboriphlebia (0.

0) angularly curved (Fig. 13-14). Ninth sternum of ~ (P) deeply cleft. (0) entire or shallowly concave. anteromedian emargination Furcation 4: Labrum: length/width A B (P) 2/3-3/4 (Fig. 19). (0) 1/3-1/2 (Fig. 20,22). (0) cleft, V-shaped dorsally and ventrally (Fig. 19). (P) shallow U-shaped or deep Vshaped ventrally (Fig. 2123). Mandible: outer margin (P) slightly angular (Fig. 13). (0) distinctly angular (Fig. 14). Maxilla: galea-lacinia (P) narrow at apex (Fig. 24). (0) broad at apex (Fig. 25).

Some of the primitively dichotomously symmetrical branching was lost under the rigid requirements of flight mechanics (Kukalova-Peck 1978) soon after the Paleoptera and the Neoptera started using their alar appendages for forward movement. However, remnants of the primitively branched condition of all veins are scattered throughout the ancient Paleozoic pterygotes. This residual branching gives evidence as to the original state and is well known to paleoentomologists (see Carpenter 1966, Sharov 1966, Kukalova-Peck 1978, and Hootton 1976 for summaries).

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