Galapagos Species Database
The Galapagos Species Database shares the information about the species from our Natural History Collections.
Tridentata borneensis
Domain
Eukaryota
Kingdom
Animalia
Phylum
Cnidaria
Class
Hydrozoa
Order
Leptothecata
Family
Sertulariidae
Genus
Tridentata
Species
borneensis
Taxon category: Accepted
Note: Specimens from Cocos Island match Sertularia borneensis descriptions. The species’ nomenclature is unsettled due to similarities with S. tumida, S. maldivensis, and S. tongensis. T. borneensis resembles S. longa in trophosome but differs in gonothecae shape. It has horizontally ribbed gonothecae with two horns, while S. longa has smooth-walled gonothecae with a distal collar. T. borneensis is considered cryptogenic in the Eastern and Central Pacific (Calder, et al., 2022). Previously as Tridentata longa ( from the Galápagos Islands by Calder et al. (2003, as T. longa), based on sterile specimens (Calder, et al., 2022). Syn.: Sertularia borneensis Billard, 1925, Sertularia vervoorti Migotto & Calder, 1998 (Ahyong et al., 2024).
Origin: Cryptogenic
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This page should be cited as follows:
"Galapagos Species Database, Tridentata borneensis", dataZone. Charles Darwin Foundation, https://datazone.darwinfoundation.org/en/checklist/?species=25385. Accessed 5 November 2026.