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Russian Journal of Marine Biology

, Volume 33, Issue 3, pp 145–160 | Cite as

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

  • E. V. Bogomolova
Invertebrate Zoology

Abstract

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.

Key words

Pycnogonida Nymphon postembryonic development fine morphology developmental pathways lecithotrophic protonymphon 

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Copyright information

© Pleiades Publishing, Ltd. 2007

Authors and Affiliations

  • E. V. Bogomolova
    • 1
  1. 1.Moscow State UniversityMoscowRussia

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