In 2006, cave diving teams led by Thomas Iliffe from Texas A&M University succeeded - for the first time - in collecting remipede larvae that represented different developmental stages. The naupliar larvae, collected directly from the water column in an anchialine cave system, allowed us to reconstruct the post-embryonic development of Remipedia more than 25 years after their discovery (Koenemann et al. 2008, 2009)."> In 2006, cave diving teams led by Thomas Iliffe from Texas A&M University succeeded - for the first time - in collecting remipede larvae that represented different developmental stages. The naupliar larvae, collected directly from the water column in an anchialine cave system, allowed us to reconstruct the post-embryonic development of Remipedia more than 25 years after their discovery (Koenemann et al. 2008, 2009).">

Document of dataset 3105

Dataset record

Type
Dataset
title in English
World Remipedia Database
Description in English
Remipedia represent a comparatively small group of crustaceans, with only 20 living species assigned to three families. The first specimens were discovered three decades ago during a cave diving expedition on Grand Bahamas Island (Yager, 1981).
At first glance, a remipede does not look much like a crustacean at all. The remipede trunk is long and undivided, composed of 15 to 42 homonomous segments. It does not exhibit a structural subdivision into two or more distinct body regions, such as a thorax followed by an abdomen, or a pleon. Among the morphological disparity of crustacean forms, this body plan is unique, and superficially, remipedes bear a certain resemblance to another, terrestrial group of arthropods, the Myriapoda.
However, upon closer examination, remipedes reveal a number of characters that they share with many crustaceans. These include, among others, two pairs of antennae, each with two branches; the morphology of some of the mouthparts; paddle-shaped trunk limbs, also composed of two branches; and a posterior body terminus with caudal rami.
To date, all living remipedes, assigned to the order Nectiopoda, have been found exclusively in marine cave systems. These caves are often land-locked water bodies, with subterranean connections to the ocean (anchialine cave systems). All nectiopods are eyeless and whitish-transparent - the loss of eyes and pigmentation are typical adaptations to life in subterranean environments.
Remipedes are hermaphrodites, bearing female gonopores on the seventh trunk segment and male pores on segment 14. Their head region is armed with three pairs of prehensile limbs. Because of these powerful raptorial appendages remipedes were, evidently, considered obligatory predators. This view was supported by occasional reports from cave divers, who observed remipedes hunting and catching comparatively large cave shrimps.
However, our behavioral observations of remipedes maintained in tanks could not confirm an exclusively carnivorous mode of feeding (Koenemann et al. 2007b; see also a video summary of behavioral observations here). Six individuals - observed over a 2-3 months period - spent more than 99% of observation time filter- or particle-feeding. A variety of prey organisms offered to the remipedes were largely ignored, and predation could be observed in only three cases.
There are still many aspects of the biology of Remipedia we do not know at all. These unresolved issues have certainly contributed to the enigmatic aura that surrounds this group of arthropods. For example, it is not known how "old" remipedes are from a paleogeographic point of view. We are also not certain about the phylogenetic position of Remipedia within the Crustacea. Moreover, there was literally nothing known about the modes of reproduction and development in remipedes until recently.
In 2006, cave diving teams led by Thomas Iliffe from Texas A&M University succeeded - for the first time - in collecting remipede larvae that represented different developmental stages. The naupliar larvae, collected directly from the water column in an anchialine cave system, allowed us to reconstruct the post-embryonic development of Remipedia more than 25 years after their discovery (Koenemann et al. 2008, 2009).
Abstract in English
A world checklist of Remipedia, compiled by taxonomic experts and based on peer-reviewed literature.
License
https://spdx.org/licenses/CC-BY-4.0.html
bibliographicCitation
Koenemann, S.; Hoenemann, M.; Stemme T. (2024). World Remipedia Database. Accessed at https://www.marinespecies.org/remipedia on yyyy-mm-dd

Temporal coverage

Temporal
Start date
1758-1-1

Geographical coverage

Spatial
World Waters

Thesaurus terms

Keyword
Classification
Marine invertebrates
Species
Taxonomy

Themes

theme
Biology
Biology > Ecology - biodiversity
Biology > Invertebrates

Taxonomic terms

Taxon keywords
Remipedia

Ownerships

contributor
Vlaams Instituut voor de Zee
creator
Stefan Koenemann
creator
Mario Hoenemann
creator
Torben Stemme
contributor
Stefan Koenemann
contributor
Mario Hoenemann
contributor
Torben Stemme
contactPoint
Stefan Koenemann
contributor
Stefan Koenemann

Dataset references

record
World Register of Marine Species

Special collections

part of special collection
Belgian marine datasets
Marine Biodiversity and Ecosystem Functioning

Document metadata

date created
2012-07-13
date modified
2024-01-18