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Free Content Larval Development of Euphausia Fallax Hansen (Crustacea: Euphausiacea) with a Comparison of Larval Morphology within the E. Gibboides Species Group

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The larval development of Euphausia fallax, including calyptopis stages I–III and furcilia stages I–VI, is described and illustrated. The larvae are referred to the E. gibboides species group, which includes E. gibboides, E. sanzoi, and E. fallax, by both morphological and geographical characters. Growth and development of the larvae of the species group are compared and larval characters are distinguished which appear to be specific to the species group within the genus and which suggest a close relationship of sanzoi and fallax within the species group. Identification of the larval forms of E. fallax expands the range of the species, previously known only from southeast Asian waters, to areas within the Indian Ocean.

Document Type: Research Article

Publication date: April 1, 1978

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