Limnognathia maerski

Overview

The head, thorax and abdomen bear dorsal and lateral epidermal plates, but the ventral epidermis lacks internal plates. Two ventral ciliary rows provide locomotion; a posterior adhesive ciliated pad assists contact. Tactile sensoria project from the body, while complex jaws lie inside the pharynx.

A published correction to the original journal cover is essential to scale and colour. Its pictured animal measured 128 micrometres, not 128 centimetres. The correction also states that the vivid colour in the Nomarski photomicrograph was an optical effect, while the living animal is transparent. Neither a giant worm nor a naturally rainbow-coloured body is justified by that image.

Jaw similarities suggested Gnathifera ancestry to the 2000 authors. Their particular sister-group proposal remains historical, not a newly computed tree.

Recent species delimitation changes the older account of a single widespread species. Sato and coauthors combined anatomy and single-specimen transcriptomic data across Greenland, the Pyrenees and a Subantarctic population. They recognised the Subantarctic population as Limnognathia desmeti but did not definitively split the Greenland and Pyrenean samples. Visible similarity therefore cannot safely assign an unidentified Crozet animal to L. maerski.

Origins & earliest records

Kristensen and Funch described the West Greenland animal in 2000. Only adult females occurred in the original sample.

Evidence & interpretation

Cited text only; no sourced image reused.

Selected bibliography

Documented works and useful reading. This is not a list of every appearance.

1. 01

   Micrognathozoa: a new class with complicated jaws like those of Rotifera and Gnathostomulida

   Reinhardt M. Kristensen and Peter Funch · 2000

2. 02

   Correction to the October2000 Journal of Morphology cover caption

   Journal of Morphology editorial correction · 2000

3. 03

   Phylogenomics of the rarest animals: a second species of Micrognathozoa identified by machine learning

   Shoyo Sato · 2025

Family, evolution & connections

Taxonomic classification

A hierarchy of classified groups, not a chain of direct ancestors.

Source note: The 2025 study uses phylum rank; L. desmeti remains separate.

1. PhylumMicrognathozoa
2. GenusLimnognathia
3. SpeciesLimnognathia maerski

References

Sources supporting this profile. Linked pages have their own scope and editorial standards.

1. Primary textSource recordResearch access: 2026-10-11
2. Primary textSource recordResearch access: 2026-10-11
3. Primary textSource recordResearch access: 2026-10-11

Image credits

AI micrognathozoan anatomy; fine detail conceptual.

Modern AI interpretation: internal jaws, ciliary rows and adhesive pad; not a micrograph.