Siboglinidae Caullery 1914
- Dataset
- Identification of fossil worm tubes from Phanerozoic hydrothermal vents and cold seeps
- Rank
- FAMILY
Classification
- kingdom
- Animalia
- phylum
- Annelida
- class
- Polychaeta
- order
- Sabellida
- family
- Siboglinidae
description
(Fig. 9 E – I)
description
Description. Large brown silicified tubes 3.7 – 4.3 mm in diameter, uncompressed in section (Fig. 9 E) and with clear multi-layering (Fig. 9 F – I) that is very thick and well consolidated in some of the tubes (Fig. 9 I). Highly frayed edges can be seen, suggesting that tubes were originally organic and fibrous (Fig. 9 F).
discussion
Remarks. The clear round transverse sections of the larger brown tubes suggests that the tubes were originally rigid. Their size may indicate that the inhabitants were not frenulates, while the structure of the tube wall indicates that they are more likely to have been made by siboglinids than chaetopterids due to the thick, well-consolidated multi-layering. These tubes fall among siboglinids when more homoplasy is permitted in the cladistic analyses (Fig. 23 B); therefore, this affinity is only tentatively suggested.
materials_examined
Material. OKb 4 - 3, larger tubes with brown walls largely obscured by rock matrix. Donated by F. Gill. Occurrence. Okukinenbetsu River (Kanajirisawa Creek) seep carbonate, Obira-machi, north-western Hokkaido, northern Japan. Mudstone of Middle Ezo Group, Cenomanian, Cretaceous (Majima et al. 2005; Kaim et al. 2008; Kiel et al. 2008 a).
vernacular_names
‘ Okukinenbetsu brown tubes’