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Species Vespula vidua - Widow Yellowjacket

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Molecular phylogenetics of Vespoidea indicate paraphyly of the superfamily...
By Pilgrim E.M., von Dohlen C.D., Pitts J.P.
Zoologica Scripta 37: 539–560, 2008
Full title: Molecular phylogenetics of Vespoidea indicate paraphyly of the superfamily and novel relationships of its component families and subfamilies

Abstract

Identifying the sister group to the bees: a molecular phylogeny of Aculeata with an emphasis on the superfamily Apoidea
By Debevec A.H., Cardinal S., Danforth B.N.
Zoologica Scripta 41: 527-535, 2012

The Wasps and Bees of the Bimini Island Group, Bahamas, British West Indies (Hymenoptera: Aculeata)
By Karl V. Krombein
American Museum Novitates, no. 1633: 1-29, 1953

Phylogenomic inference of the higher classification of velvet ants (Hymenoptera: Mutillidae).
By Waldren, G.C., Sadler, E.A., Murray, E.A., Bossert, S., Danforth, B.N. & Pitts, J.P.
Systematic Entomology, 2023
Waldren, G.C., Sadler, E.A., Murray, E.A., Bossert, S., Danforth, B.N. & Pitts, J.P. (2023) Phylogenomic inference of the higher classification of velvet ants (Hymenoptera: Mutillidae. Systematic Entomology, 1–25.

Available from: https://doi.org/10.1111/syen.12588.

A List of Wasps Collected in Florida, March 29 to April 5, 1953, with biological annotations
By Karl V. Krombein and Howard E. Evans
Proceedings of the Entomological Society of Washington, 1954

Hymenoptera of America North of Mexico - Synoptic Catalog
By C.F.W. Muesebeck and Karl V. Krombein
United States Department of Agriculture, Agriculture Monograph No. 2, 1951

Evolutionary history of the Hymenoptera
By Peters et al.
Current Biology 27: 1–6, 2017

The Hymenoptera of Costa Rica
By Paul E. Hanson and Ian D. Gauld, editors
Oxford University Press, 1995
A comprehensive treatment of the biology, systematics, and diversity of Hymenoptera in Costa Rica. Keys to superfamilies, families, subfamilies and in many cases, genera are included. Given the high level of biodiversity of Hymenoptera in Costa Rica in comparison to most areas of the world, this is a valuable reference book for students of Hymenoptera in any part of the world.

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