The orthocladiine Chironomidae genus
Stictocladius Edwards was described originally from South America. Although recognised subsequently as present also in Australia and New Zealand, the true diversity in the Neotropics has remained unclear. After more than a decade of collections of both isolated adults and aquatic immature stages, we can recognise several new taxa and associate some immature stages. Thus, we describe
Stictocladius prati n. sp. as male, female, pupa and larva;
Stictocladius acutus n. sp. and
Stictocladius acrilobus n. sp. as male, female and pupa;
Stictocladius fimbriatus n. sp. as male and female;
Stictocladius fovigus n. sp. and
Stictocladius nudiventer n. sp. as male and pupa; and
Stictocladius privicalcar n. sp. and
Stictocladius prostatus n. sp. each as male imago alone. The male and female of
Stictocladius pulchripennis Edwards is redescribed and the pupa described. The male and female of
Stictocladius flavozonatus Edwards and the male of
Stictocladius calonotum Edwards are described. Five pupal types are described:
Stictocladius sp. A (near
S. acrilobus),
Stictocladius sp. B (possibly
S. calonotum),
Stictocladius sp. C (near
S. calonotum),
Stictocladius sp. D (possibly
S. flavozonatus) and
Stictocladius sp. E with uncertain affinity. A larva from Chile of the
Stictocladius ??sofour type?? (
Stictocladius sp. F) and an unreared larva from North America (
Stictocladius sp. G) possibly belonging to
S. acutus are described. Keys to named Neotropical male and female imagines of
Stictocladius and to all pupal forms of Neotropical
Stictocladius are provided. Some data concerning fourth instars of
Stictocladius are presented. Means of differentiation from putative sister taxon
Lopescladius are discussed.
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