Female amphipod Bathyporeia elegans . Through transparent covers, an egg is visible in the brood chamber.
View of the female amphipod Orchestia gammarellus from the ventral side. Oostegitis is visible.
Marsupium , or Marsupium , or brood chamber ( lat. Marsupium ) is a chamber on the ventral side of the thoracic section of sexually mature females of higher cancers from the superorder Peracarida , which serves to carry eggs until the young hatch, which looks like a smaller copy of adults and is called decoy [1] . The walls of Marsupium are formed by sternites of the thoracic segments and oostegites - lamellar outgrowths that overlap one another in a tile -like manner .coxopods of the part of the chest limbs [1] . The presence of marsupium is one of the main autapomorphies of the superorder Peracarida , which allowed many representatives of this group to switch to a land lifestyle [1] .
Notes
- ↑ 1 2 3 Westheide V. , Rieger R. From arthropods to echinoderms and chordates // Invertebrate Zoology. = Spezielle Zoology. Teil 1: Einzeller und Wirbellose Tiere / Per. with him. O. N. Bölling, S. M. Lyapkova, A. V. Mikheev, O. G. Manylov, A. A. Oskolsky, A. V. Filippova, A. V. Chesunov; under the editorship of A.V. Chesunova. - M .: KMK Scientific Publications Fellowship, 2008. - V. 2. - P. 588. - iv + 513–935 + iii p. - 1000 copies. - ISBN 978-5-87317-495-9 .