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Original Articles

Titimbera, a new genus of Orthocladiinae from South and Central America (Diptera: Chironomidae)

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Pages 96-106 | Received 05 Jan 2015, Accepted 11 May 2015, Published online: 16 Jul 2015
 

Abstract

Titimbera n. gen. is erected based on the males of three new species from South and Central America: T. amazonica n. sp. from the Amazon region, Brazil; T. titi n. sp. from Venezuela and T. laselvensis n. sp. from Costa Rica. The combination of bare eyes and wing membrane; antenna without strong apical seta; scalpellate acrostichals in mid scutum; costa strongly extended; R4+5 ending opposite to M3+4; Cu1 strongly curved to slightly sinuous; anal point sitting high on tergite IX, nearly parallel-sided with bluntly rounded apex; and club-shaped to subtriangular gonostylus with distinct heel will separate the genus from all other orthoclads.

Titimbera n. gen. é descrito com base em machos de três espécies novas das Américas Central e do Sul: T. amazonica n. sp. da região amazônica, Brasil; T. titi n. sp. da Venezuela e T. laselvensis n. sp. da Costa Rica. A combinação de olhos e membrana alar nus; antena sem forte seta apical; acrosticais escalpeladas no meio do escudo; costa fortemente estendida; R4+5 terminando oposta a M3+4; Cu1 de fortemente curvada a levemente sinuosa; ponta anal surgindo da porção média do tergito nono, quase paralela lateralmente e com ápice arredondado e gonóstilo de clavado a subtriangular com distinta projeção separam o gênero de todos os outros ortocladíneos.

Acknowledgments

We are indebted to Dr. Marco Gaiani, Maracai, Venezuela, for all help during the fieldwork in Venezuela; to Dr. Neusa Hamada, Manaus, Brazil, for setting up the project to increase the knowledge of aquatic insects in the Amazonas State; and to Dr. Karl Thunes, Bergen, Norway, for providing us with chironomids collected in Costa Rica. Gladys Ramirez made the slide preparations.

Additional information

Funding

Financial support for fieldwork in Amazonas was provided through a project supported by PRONEX-CNPq (MCT)-FAPEAM [Insetos aquáticos: biodiversidade, ferramentas ambientais e a popularização da ciência para melhoria da qualidade de vida humana no estado do Amazonas] and Instituto Nacional de Pesquisas da Amazônia (INPA, MCT).

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