http://zoobank.org/urn:lsid:zoobank.org:pub:D3F4C4B2-C7A5-49E7-A462-F38C68309040 Two new acoels (Acoelomorpha) of the genus Haplogonaria from the northwest Atlantic

Two previously unknown species of Haplogonaria (Acoela), H. schillingi sp. nov. and H. baki sp. nov., are described from the coastline of Maine, USA. The two species are morphologically similar to each other but H. schillingi can be distin-guished from H. baki by its red pigmentation, its possession...

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Bibliographic Details
Main Authors: Matthew D. Hooge, Seth Tyler
Other Authors: The Pennsylvania State University CiteSeerX Archives
Format: Text
Language:English
Published: 2015
Subjects:
Key words
Meiofauna
turbellarians
Acoela
Xenacoelomorpha
interstitial
Northwest Atlantic
Online Access:http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1029.4632
http://www.biotaxa.org/Zootaxa/article/download/zootaxa.4013.1.8/15206/
Description
Summary:Two previously unknown species of Haplogonaria (Acoela), H. schillingi sp. nov. and H. baki sp. nov., are described from the coastline of Maine, USA. The two species are morphologically similar to each other but H. schillingi can be distin-guished from H. baki by its red pigmentation, its possession of a large genital atrium that branches posteriorly to the sem-inal vesicle and anteriorly to the vagina, a seminal vesicle that is more ellipsoid-shaped than spherical, and a well-defined wall in the seminal bursa. We provide a description of the new species using live observation, light microscopy of serial sagittal sections, and confocal microscopy imaging of F-actin. We compare the morphology of the new species with other members of the genus and discuss the phylogenetic position of H. schillingi in light of conflicting morphological and molecular data.

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