Project 2505: S. Hayer, S. Köhnk, S. Boretius, D. Brandis. 2016. A new type of brachyuran seminal receptacle in the masked crab Ethusa mascarone (Brachyura, Ethusidae). Journal of Morphology. Volume 277 (11):1497–1508.
Specimen: Ethusa mascarone (unvouchered)

Abstract

The reproductive system of the female Ethusa mascarone (Herbst, 1785) was studied with a combination of histological and MRI-techniques. The study reveals a completely new type of eubrachyuran seminal receptacle. This receptacle consists of two largely separate chambers that engage with each other in a manner similar to shaking hands. One chamber facing the medial axis is lined by cuticle while the second chamber consists of a thick holocrine epithelium. Both chambers are connected by two openings of a unique structure. First, the glandular chamber opens ventro-laterally to the cuticle chamber via a laterally flattened connective duct that is lined by a highly folded cuticle. A second opening connects both chambers dorsally with the oviduct orifice. A distinct character is the cuticular hook-like projection that is situated in between the connection of oviduct opening, the glandular chamber and the cuticle chamber of the seminal receptacle.
The complete seminal receptacle exhibits a combination of plesiomorphic and apomorphic characters. The arrangement of the receptacles features in two separate chambers including the ventro-lateral connection of the glandular chamber to the cuticle chamber presumably reflect an early evolutionary stage of an eubrachyuran receptacle. However, the dorso-lateral opening between both chambers including the hook-like projection appears to be an apomorphic character of at least E. mascarone.


Read the article »

Article DOI: 10.1002/jmor.20591

Project DOI: 10.7934/P2505, http://dx.doi.org/10.7934/P2505
This project contains
  • 2 Media
  • 1 Taxon
  • 2 Specimens
Total size of project's media files: 1.81M

Download Project SDD File
Currently Viewing:
MorphoBank Project 2505

    Authors' Institutions

    • Christian-Albrechts-University Kiel



    Members

    member name taxa specimens media
    Sarah Hayer
    Project Administrator
    122


    Project has no matrices defined.



    Project views

    type number of views Individual items viewed (where applicable)
    Total project views7979
    Project overview1722
    Media views3110Media search (2348 views); M426152 (383 views); M426153 (379 views);
    Specimen list1617
    Taxon list1005
    Bibliography525




    Project downloads

    type number of downloads Individual items downloaded (where applicable)
    Total downloads from project178
    Project downloads177
    Media downloads1M426152 (1 download);