Lampocteis cruentiventer gen. nov., sp. nov.: A new mesopelagic lobate ctenophore, representing the type of a new family (Class Tentaculata, Order Lobata, Family Lampoctenidae, fam. nov.)
This paper describes a new genus and species of mesopelagic ctenophore in the Order Lobata, Lampocteis cruentiventer, which was first collected in 1979 off southern California and later collected and studied in detail from 1991 to 1999 in Monterey Bay. This ctenophore differs from all previously described lobate ctenophores in two major ways: (1) all of the meridional canals have blind aboral endings, and (2) the body is penetrated by a deep notch located between the adjacent subtentacular comb rows at the level of the infundibulum. Because of these distinctive features, we feel justified in erecting a new family, the Lampoctenidae, for this species. Several other features (the large pigmented stomodaeum, the large diverticulate paragastric canals and the well-developed, strongly iridescent comb plates) distinguish this species. Based on the discovery of L. cruentiventer, we have tentatively revised the diagnoses of the families Bolinopsidae and Eurhamphaeidae to take into account the spatial relationships of the adradial and meridional canals. We provisionally recognize the following families in the Order Lobata as valid: Bathocyroidae, Bolinopsidae, Eurhamphaeidae, Lampoctenidae, Leucotheidae, and Ocyropsidae.
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Document Type: Research Article
Publication date: March 1, 2001
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