Michael D. Hubbard and E. F. Riek.
New Name for a Triassic Mayfly from South Africa.
Psyche 84:260-261, 1977.

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NEW NAME FOR A TRIASSIC MAYFLY FROM
SOUTH AFRICA (EPHEMEROPT&RA)*
BY MICHAEL D. HUBBARD' AND E. F. RIEK~
In a recent paper Riek (1976) described a new species of fossil Ephemeroptera from the Triassic of South Africa as Xenophlebia optata. This mayfly, of which only the wing is known, is suffi- ciently distinct from other known mayflies to be referrable to a separate superfamily (Xenophlebioidea) without recognizable close phyletic relationship to any other known Ephemeroptera. Unfortunately, through a chain of circumstances, the fact that Demoulin (1968) had already used the generic name Xenophlebia for a genus of fossil Leptophlebiidae (Ephemeroptera) from the Baltic amber was not taken into consideration. Thus ~eno~hlebia Riek, 1976, must fall as a junior homonym of Xenophlebia De- moulin, 1968, and be replaced by a new name. The International Code of Zoological Nomenclature also requires that family-group names based on a genus name that is a junior homonym be replaced as invalid. We therefore propose the following new names.
Superfamily Litophlebioidea: new name for Xenophlebioidea Riek, 1976: 149.
Family Litophlebiidae: new name for Xenophlebiidae Riek, 1976: 150.
Genus Litophlebia: new name for Xenophlebia Riek, 1976: 150.
Entymology: Gr., Litos, meaning frugal, and Phlebos, mean- ing vein, in reference to the marked reduction in the cubito-anal field of the wing.
Type species: Xenophlebia optata Riek, 1976, by objective synonymy.
Species included: Litophlebia optata (Riek, 1976) new com- bination.
'Laboratory of Aquatic Entomology, Florida A&M University, Tallahassee, Florida 32307, USA.
*19 Duffy St., Ainslie, Canberra, ACT 2602, Australia. *Manuscript received by the editor January 26, 1978.



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19771 Hubbard & Riek - Triassic Mayfly 26 1 We thank the Cooperative State Research Service, U.S.D.A., PL 89-106, for partial financial support. ,-
DEMOULIN, G.
1968. Deuxikme contribution a la connaissance des ~phemeroptkres de l'ambre oligonkne de la baltique. Dtsch. Entomol. A., N.F., 15: 233-276.
RIEK, E. F.
1976. An unusual mayfly (1nsecta:Ephemeroptera) from the Triassic of South Africa. Palaeontol. Afr. 19: 149-1 5 1.




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