Species ID
OC-SP-0002628
Discovered
Phylum
Platyhelminthes
Species ID
OC-SP-0002628
Provisional Species Name
Gnosonesima sp_IRLBB_01682
Lowest Valid Taxon Name in WoRMS
Gnosonesima
Lowest Known Rank
Genus
Status
Discovered
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Embargo
No
Kingdom
Animalia
Phylum
Platyhelminthes
Order
Gnosonesimida
Family
Gnosonesimidae
Genus
Gnosonesima
Taxonomic Remarks
Gnosonesima sp.2 lacks eyes and can therefore be readily distinguished from G. brattstroemi and Gnosonesima sp.1. Thus, the morphology of the male sclerotised structures provides the primary traits for differentiating the new species from previously described ones. The straight, 80-µm-long stylet of Gnosonesima sp.2 differs from that of B. mediterranea (proximally bent, 240 µm long) and B. tropicalis (distally branched, 133 µm long). In G. antarctica, the stylet is 97 µm long, and the testes are positioned anterior to the male copulatory bulb, whereas in Gnosonesima sp.2 the testes are located caudally to the bulb. Both G. borealis and G. reisingeri are poorly known species: a short, thin-walled, eversible penis has been described for G. borealis, and a short stylet for G. reisingeri. Unfortunately, measurements for these structures are unavailable, and the remaining morphology of the male atrial organs is not comparable to that of Gnosonesima sp.2.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Species of Gnosonesima without eyes. Male copulatory bulb including an 80-µm-long, straight stylet, ending in an oblique cut, sharp tip.
Ecology
Medium-grained and well-sorted sand, 10 m deep, salinity 37 ‰.
Distribution
United States of America, Florida, 6.75 km SE from the mouth of Fort Pierce Inlet, 27.429300; -80.241083.
Scientific Name Authorship
Diez, Yander L.
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