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Reproduction and development of the marine planaria Sabussowia dioica

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£75.00 £71.25 £72.75 £74.25 £75.75 £77.25 £78.75 25 July 2026 07 August 2026 21 August 2026 03 September 2026 17 September 2026
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Price distribution over 55 days • 1 price levels

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55 days 0 14 28 41 55 £75 Days at Price

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Most common price: £75 (55 days, 100.0%)

Price range: £75 - £75

Price levels: 1 different prices over 55 days

Description

Sabussowia dioica is a gonochoric free-living flatworm that is an exception in the Plathelminthes phylum, where hermaphroditism is the rule. Very little is known about its biology. This work presents, for the first time, a description using light and electron microscopy of all aspects of its reproduction: gametogenesis, fertilisation, oviposition and development. Spermatogenesis in rosettes and the structure of the filiform and biflagellate spermatozoon are consistent with the Plathelminthe model. The heterocellular female gonad has 2 ovaries and numerous vitellogenic glands. Oocytes containing ribonucleoprotein lobules and cortical granules are produced in the ovaries. Yolk globules and shell globules are produced in the yolk cells. Fertilisation occurs in the ovaries by hypodermic impregnation from spermatophores deposited on the female's body, a process first reported in Triclades. A few eggs and thousands of yolk cells are collected in oviposition cocoons. The stages of development are described. This document will be of interest to zoologists and biologists.

Product Specifications

Format
paperback
Domain
Amazon UK
Release Date
24 July 2023
Listed Since
24 July 2023

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