New World Stictocladius Edwards (Diptera: Chironomidae)

Area of Science:

• Entomology
• Taxonomy
• Biodiversity Studies

Background:

• The Neotropical diversity of the orthocladiine Chironomidae genus Stictocladius remained poorly understood.
• Previous recognition of Stictocladius was limited to South America, Australia, and New Zealand.

Purpose of the Study:

• To elucidate the true diversity of the Stictocladius genus within the Neotropics.
• To describe new species and associate immature stages with adult forms.
• To provide identification keys for Neotropical Stictocladius.

Main Methods:

• Extensive collections of adult and immature aquatic stages of Stictocladius over a decade.
• Morphological description and comparison of new and existing taxa.
• Development of identification keys for male, female, and pupal forms.

Main Results:

• Description of eight new Stictocladius species (S. prati, S. acutus, S. acrilobus, S. fimbriatus, S. fovigus, S. nudiventer, S. privicalcar, S. prostatus).
• Redescription of S. pulchripennis and description of its pupa; description of S. flavozonatus (male, female) and S. calonotum (male).
• Description of five pupal types (A-E) and two larval types (F-G), with some affinities suggested.

Conclusions:

• Significant expansion of the known diversity of Stictocladius in the Neotropics.
• Establishment of a taxonomic framework with keys for identification of adults and pupae.
• Discussion on differentiation from the related genus Lopescladius.