Glomerula

Not to be confused with Glomerulus.

Glomerula Temporal range: 199–0  Ma [1] PreꞒ Ꞓ O S D C P T J K Pg N Jurassic - present
Glomerula gordialis from the Upper Cretaceous of Germany
Scientific classification
Kingdom:	Animalia
Phylum:	Annelida
Clade:	Pleistoannelida
Clade:	Sedentaria
Order:	Sabellida
Family:	Sabellidae
Subfamily:	Sabellinae
Genus:	Glomerula Brünnich Nielsen, 1931
Species
Glomerula piloseta Glomerula gordialis † Glomerula serpentina † Glomerula lombricus † Glomerula plexus †

Glomerula piloseta, longitudinal section of the tube

Glomerula is a genus of polychaete worm in the family Sabellidae. It differs from all other Sabellidae in having a calcareous tube and spinose setae. Only one living species, G. piloseta, is known from Lizard Island, Great Barrier Reef, Australia. ^[2] The oldest fossils of Glomerula are known from the Early Jurassic ^[1] and their tube microstructure has remained unchanged since then. ^[3]

References

1. Jäger, M. (2004). "Serpulidae und Spirorbidae (Polychaeta sedentaria) aus Campan und Maastricht von Norddeutschland, den Niederlanden, Belgien und angrenzenden Gebieten". Geologisches Jahrbuch. A 157: 121–249.
2. Perkins, T.H. (1991). "Calcisabella piloseta, new genus and species of Sabellinae (Polychaeta: Sabellidae)". Bulletin of Marine Science. 48 (2): 261–267.
3. Vinn, O.; ten Hove, H.A.; Mutvei, H. (2008). "On the tube ultrastructure and origin of calcification in sabellids (Annelida, Polychaeta)". Palaeontology. 51 (2): 295–301. Bibcode:2008Palgy..51..295V. doi: 10.1111/j.1475-4983.2008.00763.x .