1, ^Stuttgarter Beiträge zur Nat Serie A (Biologie) Herausgeber: Staatliches Museum für Naturkunde, Rosenstein 1, D-7019f Stuttgarter Beitr. Naturk. Ser. A Nr. 580 6S. Stuttgart, 1. 12. 1998 Remarks on the Genus Brasilocaenis (Ephemeroptera: Caenidae), with the Description of a New Species: Brasilocaenis mendesi By Peter Malzacher, Ludwigsburg With 3 figures Summary A new species of the genus Brasilocaenis Puthz 1975 from the Pantanal, Brasil is described. The position of B. mendesi spec. nov. within the genus is discussed. As a result of this, the ge-nus is divided into two species-groups. Zusammenfassung Aus dem brasilianischen Pantanal wird eine neue Art der Gattung Brasilocaenis Puthz 1975 beschrieben. Die Stellung von B. mendesi spec. nov. innerhalb der Gattung wird diskutiert und diese daraufhin in zwei Gruppen unterteilt. 1. Introduction Four species of the genus Brasilocaenis have been described hitherto from the male genitalia: B. irmleri Puthz 1975, B. puthzi Malzacher 1986, B. renata Malzacher 1986 and B. septentrionalis Malzacher 1990. Apart from the very differentiated apomorph male genitalia the species are very similar to those of the genus Caenis. Therefore the identity of a further species B. intermedia Malzacher 1986 described only from the lar-vae is doubtful. All species were found in the Amazon rain forests. The first two are very common and widely distributed and also to be found in Venezuela (Orinoco) and in the Mato Grosso/Pantanal region (Nolte 1997). I wish to thank Dr. Ulrike Nolte for leaving me the material for study.
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