Aegla rostrata n. sp., (Decapoda, Aeglidae), nuevo crustáceo dulceacuícola del Sur de Chile
1977; Taylor & Francis; Volume: 12; Issue: 2 Linguagem: Inglês
10.1080/01650527709360516
ISSN1744-5140
Autores Tópico(s)Fish biology, ecology, and behavior
ResumoSummary Aegla rostrata n. sp. (Decapoda, Aeglidae), a new freshwater crustacean from Southern Chile The description of Aegla rostrata n. sp. a new species of Aegla from lakes and rivers of the Valdivia basin (Provincia de Valdivia, Chile) is given. Its characteristics being: rostrum long, narrow, styli‐form and quitinous tipped, exceeding by 2 to 21/2 times the length of the corneas. Protogastric prominences squamous and well marked. Posterior branchial margin expanded and recurved. Palmar crest wide, subrectangular and broadly serrated. Externally A. rostrata resembles A. denticulata Nicolet, 1849, but differs from the last because it lacks the longitudinal carina along the dorsum of the carapace and the median tubercule on the fourth toracic sternum. A. rostrata has been found in the lakes Riñihue, Panguipulli and Calafquén, as well as in rivers Calle Calle and Huanahué. In the lake Riñihue A. rostrata has been collected from the litoral to depths of 320 m. This distribution makes it the second species of the genus inhabiting lacustrine habitats. It is also the first of which the complete batimetric range is known, at least in its type locality. It is suggested that te present distribution of A. rostrata has been attained after the ice melting of the pleistocene glaciation.
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