Memoirs of the Museum of Victoria 48(2): 91-100 (1987)
ISSN 0814-1827
TWO NEW GENERA OF LEPTOPHLEBIIDAE
(INSECTA: EPHEMEROPTERA) FROM SOUTH-WESTERN AUSTRALIA
By J. C. Dean
Water Sciences Laboratories, Melbourne and Metropolitan Board of Works,
68 Ricketts Road, Mount Waverley, Victoria 3149
Abstract
Dean, J.C., 1987. Two new genera of Leptophlebiidae (Insecta: Ephemeroptera) from south-western
Australia. Mem. Mus. Vict. 48: 91-100.
The genera Nyungara and Bibulmena are established for three species of leptophlebiid may-
flies from south-western Australia. Diagnostic features of the two genera are presented, and descrip-
tions are provided of the male imago, female imago and nymph of both N. bunni sp. nov. and
B. kadjina sp. nov., and the male imago and female imago of N. ellitasha sp. nov. Both genera
are known only from south-western Australia, and are perhaps endemic to the region.
Introduction
The mayflies of Western Australia are poorly
known, and only two publications have included
species identifications. Ulmer (1908) recorded the
leptophlebiids Atalophlebia furcifera Eaton and
Atalophlebia inconspicua) Eaton and the baetid
Baetis soror Ulmer from south-we.stern Austra-
lia, and in a later publication (Ulmer, 1916) he
recorded the baetid Cloeon viridis Klapalek from
the Kimberley district of north-western Austra-
lia. The type locality of A. inconspicua is
Adelaide and there have been no additional
records from Western Australia. Confirmation of
Ulmer's identification will require examination of
his original material. I have, however, examined
the holotype of A. furcifera which is lodged in
the Museum of Victoria and Ulmer's figures cer-
tainly do not represent this species. The type lo-
cality of A. furcifera is Melbourne and there is
no evidence that the distribution extends to
Western Australia. Riek (1970), without giving de-
tails of species identifications, has reported that
one species of Tasmanocoenis and one species of
a genus close to Atalonella occur in Western Aus-
tralia. In the present paper three new species of
Leptophlebiidae are described from south-
western Australia, and two new genera are estab-
lished to accommodate them. Additional species
have been recognised, and these will be described
as more material becomes available.
Material and methods
Much of the material on which the descriptions
are based has been collected by Dr Stuart Bunn
during an ecological study of the macroinver-
tebrates of several small streams flowing through
jarrah forests in the Darling Range. Precise lo-
cations of his study sites were given by Hynes and
Bunn (1984). Additional material has been exa-
mined from the collections held by the Museum
of Victoria, Melbourne. Colour descriptions and
measurements are based on ethanol preserved
specimens. Holotypes have been lodged in the
Museum of Victoria and paratypes have been
lodged in the Museum of Victoria (NMV) or re-
tained in the author's collection (JCD).
Genitalia and nymphal parts have generally
been drawn free-floating, and subsequently pre-
pared for detailed examination by clearing in
potassium hydroxide or mounting in polyvinyl
alcohol-lactophenol mountant. Although slide
preparation causes distortion of genitalia it is
considered essential if details of spines and setae
are to be examined. Wings have been dry
mounted, photographed and transparencies
projected onto a wall for tracing. All measure-
ments have been made using an eye-piece
graticule.
Nyungara gen. nov.
Diagnostic features. Imago. Forewing (Fig. 1)
91
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