Pylojacquesia
A monotypic hermit crab genus living in serpulid worm tubes.
Pylojacquesia is a monotypic genus of hermit crab in the family Pylojacquesidae. It is notable as one of only two genera in this small family, which was erected in 2001 after specimens were recognized as distinct from other hermit crabs. The sole species, Pylojacquesia colemani, lives in tubes secreted by serpulid worms of the genus Protula in sandy areas of the continental shelf.
Quick Facts
- Taxon
- Pylojacquesidae
Facts from the source article.
Lore & Background
Pylojacquesia was described in 2001 based on two specimens discovered in the collections of the Museum für Naturkunde at the Humboldt University of Berlin. These specimens had been collected in 1875 by the S.M.S. Gazelle in the Coral Sea, off the coast of Brisbane, Australia. The family Pylojacquesidae, to which it belongs, was erected the same year after the specimens were recognized as quite distinct from other described hermit crabs.
The genus is monotypic, with the sole species being Pylojacquesia colemani. Members of the family Pylojacquesidae differ from other hermit crabs in that their mandibles are chitinous and toothed. Pylojacquesia lives in the tubes secreted by serpulid worms of the genus Protula (Annelida: Serpulidae) in sandy areas of the continental shelf.
The specific name colemani commemorates Charles Oliver Coleman, curator of Crustacea at the Museum für Naturkunde at the Humboldt University of Berlin.
Reader's Guide
Pylojacquesia holds significance as one of only two genera in the small family Pylojacquesidae, which was erected in 2001. Its discovery highlighted the value of museum collections, as the two specimens had been collected in 1875 by the S.M.S. Gazelle but remained unrecognized for over a century. The family's distinctness from other hermit crabs is marked by their chitinous, toothed mandibles, a feature that sets them apart.
The genus is notable for its ecological specialization: it inhabits the tubes secreted by serpulid worms of the genus Protula in sandy areas of the continental shelf. This relationship with annelid worms represents a unique niche among hermit crabs. The species name honors Charles Oliver Coleman, curator of Crustacea at the Museum für Naturkunde at the Humboldt University of Berlin, reflecting the institution's role in the genus's description.
As a monotypic genus, Pylojacquesia represents a distinct evolutionary lineage within the decapod crustaceans. Its legacy lies in demonstrating how overlooked museum specimens can yield new taxonomic discoveries, and in expanding the known diversity of hermit crab lifestyles.
More in Decapod Crustacean Genera 1-24
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