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Electrophoretic study of eastern north american eurylophella ephemeroptera ephemerellidae with the discovery of morphologically cryptic species


, : Electrophoretic study of eastern north american eurylophella ephemeroptera ephemerellidae with the discovery of morphologically cryptic species. Annals of the Entomological Society of America 81(2): 174-186

The genus Eurylophella includes nine species from eastern North America, one from western North America, and three from Europe. We examined 18 polymorphic enzyme loci in 82 populations (> 2,000 individuals) of Eurylophella from 40 localities in eastern North America, representing eight of the nine currently recognized eastern species. Our data suggest that Eurylophella is actually represented by at least 15 species in eastern North America, some of which cannot be resolved morphologically. Although intraspecific comparisons revealed significant geographic variation in allele frequencies, there were no fixed allelic differences between populations. In contrast, most interspecific comparisons were characterized by the lack of shared alleles at several loci. Thus, > 99% of the individuals studied could be sorted to species by electromorphy characteristics. The average Nei's genetic distance (D) was 0.02 (range = 0-012) between conspecific populations and 0.74 (range = 0.11-1.87) between species. A phenogram generated from D values shows five groups of species branching at D < 0.060: (1) E. verisimilis, E. verisimilis-A, E. verisimilis-B, E. verisimilis-C, E. bicolor, E. minimella, E. prudentalis, E. aestiva, and E. aestica-A; (2) E. temporalis-A, E. temporalis-B, and E. temporalis-C; (3) Eurylophella sp. 1; (4) E. funeralis; and (5) E. lutulenta. Interspecific D values for Eurylophella were in the upper range of reported literature values for congeneric insect species, a fact that supports the recent elevation of Eurylophella form subgeneric to generic status. Expected heterozygosities ranged from 0.03 to 0.21; those of most species averaged 0.10-0.12.

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Accession: 005349038

DOI: 10.1093/aesa/81.2.174

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Related references

Funk, DH.; Sweeney, BW.; Vannote, RL., 1988: Electrophoretic study of eastern North America Eurylophella (Ephemeroptera: Ephemerellidae) with the discovery of morphologically cryptic species. The genus Eurylophella includes nine species from eastern North America, one from western North America, and three from Europe. We examined 18 polymorphic enzyme loci in 82 populations (> 2,000 individuals) of Eurylophella from 40 localities in...

Funk, D.H.; Sweeney, B.W., 1994: The larvae of eastern North American Eurylophella Tiensuu (Ephemeroptera: Ephemerellidae). Fourteen species of Eurylophella are recognized in eastern North America based primarily on morphology of full-grown larvae and allozyme frequencies in imagos. Eurylophella temporalis (McDunnough) and E. verisimilis (McDunnough) are redefined and...

Keffermuller, M.; Da-Terra, L.S.W., 1978: The 2nd european species of the subgenus eurylophella ephemeroptera ephemerellidae ephemerella. Descriptions of an imago male and female and a nymph of Ephemerella (Eurylophella) iberica sp. nov. are presented. Nymphs of the species were found in several rivers in Portugal, and imagines were reared in the laboratory. The new species differs...

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Allen, R.K.; Edmunds, G.F. jr.., 1963: A revision of the genus Ephemerella Ephemeroptera Ephemerellidae VII The subgenus Eurylophella. Canadian Entomologist, 95: 597-623

Kovacs, T..; Ambrus, A.., 1999: Eurylophella karelica Tiensuu, 1935 in the Carpathian Basin (Ephemeroptera: Ephemerellidae). Folia Historico Naturalia Musei Matraensis. 1998- ; 23: 153-156

Burian, Steven K., 2002: Taxonomy of Eurylophella coxalis (McDunnough) with notes on larval habitat and behavior (Ephemeroptera: Ephemerellidae). Larval stages have been associated for all of the known species of Eurylophella in eastern North America except for E. coxalis. The larva of E. coxalis is described herein from a reared series of specimens. Adults are redescribed and eggs are desc...

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