Species ID
OC-SP-0002642
Discovered
Phylum
Platyhelminthes
Species ID
OC-SP-0002642
Provisional Species Name
Promesostoma sp_S_1635
Lowest Valid Taxon Name in WoRMS
Promesostoma
Lowest Known Rank
Genus
Status
Discovered
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Embargo
No
Kingdom
Animalia
Phylum
Platyhelminthes
Order
Rhabdocoela
Family
Promesostomidae
Genus
Promesostoma
Taxonomic Remarks
The unique morphology of the stylet of Promesostoma sp.3 is not comparable to any known species of Promesostoma, and, therefore, the validity of the new species is warrantied. This species also remarkable small (385 µm long), being one of the smallest known rhabdocoel.
Received All Minimal Data for Discovery
01/04/2026
Description of Material
Species of Promesostoma 385 µm long, with eyes. Male copulatory bursa present, small, located on the proximal part of the stylet and beside the pharynx. Stylet situated beside the pharynx, with two shoulder-shaped turns (one proximally and one at midpoint), 75–78 µm long (x¯ = 77 µm; n = 3). The proximal tubular half of the stylet is 4 µm wide at midpoint, and the distal part 2–3 µm wide. The prostate and the single seminal vesicles are oriented backwards; prostate vesicle situated beside the pharynx and the seminal one latero-posteriorly. Distally, the male atrium contains a few glands.
Ecology
Green filamentous algae, intertidal, salinity 35 ‰.
Distribution
United States of America, Florida, Fort Pierce, Stan Blum Boat Ramp, 27.479571; -80.311792.
Scientific Name Authorship
Diez, Yander L.
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