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Interstitielle Amphipoden Der Konvergenten Gattungen Ingolfiella Hansen Und Pseudingolfiella N. Gen. Aus Südamerika

1965; Brill; Volume: 9; Issue: 1 Linguagem: Inglês

10.1163/156854065x00136

1568-5403

Wolfram Noodt,

Marine Ecology and Invasive Species

Among the Amphipoda, the genus Ingolfiella (suborder Ingolfiellidea) represents a type of extreme adaptation to the mesopsammal. The distribution of the 11 species hitherto known is discussed. They extend from the marine abyssal to the high mountain chain and thereby offer some good examples for the immigration of marine interstitial forms into the fresh groundwater. The possibility of the existence of such interstitial animals in the upper detritus layer of abyssal soft bottom is indicated. To the two hitherto known neotropic species, I. ruf foi and I. manni, a third species, I. uspallatae n. sp. from the Argentinian Andes, is added. It is described and figured. The species formerly described as Ingol f iella chilensis, on the contrary, does not belong to the Ingolfiellidea and is placed in a new genus: Pseudingolfiella n. gen. This genus has relationships with Bogidiella and thus belongs to the suborder Gammaridea. The external conformity of Ingolfiella and Pseudingolfiella n. gen. provides an impressive new example of convergent evolution of the Lebensformtyp Mesopsammon.