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A new species ofIlyocryptus(Anomopoda: Macrothricidae) from Argentina

✍ Scribed by Juan C. Paggi

Publisher
Springer
Year
1992
Tongue
English
Weight
776 KB
Volume
231
Category
Article
ISSN
1573-5141

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✦ Synopsis

I . elegans n.sp . from the Parana River, northeastern Argentina is proposed and its morphological features are compared with those of the apparently related I. agilis . Its outstanding characteristics are the long 2rd to 5th setae of ventral margin of the valves, the rudimentary nature of defensive setae, the low number of spines in the preanal lobe of postabdomen and the unequality of the length of the setae in the outer distal lobe of first trunk limbs .

Finding of this new species suggests that I. agilis would be a complex of species and its records should be revised .

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A new species of Ilyocryptus Sars from Cildir Lake in Kars is described and figured. In external morphology, Ilyocryptus anatolicus n. sp . resembles partly I. sordidus (Lievin) and I. spinosus Stifter, but it shows several morphological differences in shape and armature of the postabdomen and in th