Larvae of three sea spider species of the genus Nymphon (Arthropoda: Pycnogonida) from the White Sea

Larvae of three sea spider species of the genus Nymphon (Arthropoda: Pycnogonida) from the White Sea Larvae of three Nymphon species are described. For Nymphon brevirostre Hodge, 1863 and Nymphon micronyx Sars, 1888 protonymphon larvae are examined, larvae of N. micronyx have been studied for the first time. The fine external morphology of larvae is studied in detail using SEM methods; the internal structure of N. brevirostre protonymphon is additionally described. SEM data on external morphology and fine surface structures are given for several postembryonic stages of Nymphon grossipes Fabricius, 1780. Different types of postembryonic development are revealed in examined Nymphon species. N. brevirostre and N. micronyx have a “typical protonymphon” developmental pathway. A special developmental pathway named “lecithotrophic protonymphon” is suggested for N. grossipes and other Nymphonidae having large yolky eggs. Russian Journal of Marine Biology Springer Journals

Larvae of three sea spider species of the genus Nymphon (Arthropoda: Pycnogonida) from the White Sea

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Copyright © 2007 by Pleiades Publishing, Ltd.
Life Sciences; Hydrobiology; Marine Ecology
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