San Rafael Mountains, Figueroa, Hydrothermal vent (Jurassic of the United States)

Where: California (34.7° N, 119.8° W: paleocoordinates 23.2° N, 57.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Pliensbachian (190.8 - 182.7 Ma)

• Franciscan Complex

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (siliceous); lithified chert

• pillowed greenstones, serpentinites , graywackes, deepwater radiolarian cherts in a matrix of sheared mudstones and serpentinites, lens of massive sulfide

Size classes: macrofossils, microfossils

Preservation: mold/impression, replaced with pyrite

Primary reference: C. T. S. Little, T. Danelian, R. J. Herrington and R. M. Haymon. 2004. Early jurassic hydrothermal vent community from the Franciscan Complex, California. Journal of Paleontology 78(3):542-559 [W. Kiessling/M. Nimke]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 87216: authorized by Wolfgang Kiessling, entered by Madeleine Nimke on 10.03.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Gastropoda
 Trochoidea - Trochidae
Francisciconcha maslennikovi
Francisciconcha maslennikovi Little et al. 2004 top snail
Rhynchonellata
 Rhynchonellida - Peregrinellidae
Anarhynchia cf. gabbi
Polychaeta
  - Siboglinidae
Siboglindae indet.
Siboglindae indet. Caullery 1914
Vestimentiferan tube, Family Siboglindae
Protozoa
 Actinommacea - Xiphostylidae
Triactoma sp.
Triactoma sp. Rüst 1885 radiolarian
 Nassellaria - Eucyrtidiidae
Stichocapsa sp.
Stichocapsa sp. Haeckel 1881 radiolarian
 Nassellaria - Eucyrtidiellidae
Eucyrtidiellum sp.
Eucyrtidiellum sp. Baumgartner 1984 radiolarian
 Nassellaria - Syringocapsidae
Katroma sp.
Katroma sp. Pessagno and Poisson 1981 radiolarian
 Nassellaria - Parvicingulidae
Canoptum poissoni, Pseudoristola sp., Dictyomitrella ? sp.
Canoptum poissoni Pessagno et al. 1979 radiolarian
Pseudoristola sp. Yeh 1987 radiolarian
Dictyomitrella ? sp. Haeckel 1887 radiolarian
?
 Nassellaria - Hsuidae
Transhsuum sp., Parahsuum sp., Parahsuum ovale, Parahsuum simplum, Parahsuum mostleri
Transhsuum sp. Takemura 1986 radiolarian
Parahsuum sp. Yao 1982 radiolarian
Parahsuum ovale Hori and Yao 1988 radiolarian
Parahsuum simplum Yao 1982 radiolarian
Parahsuum mostleri Yeh 1987 radiolarian
 Nassellaria - Bagotidae
Canutus sp., Bagotum modestum
Canutus sp. Pessagno and Whalen 1982 radiolarian
Bagotum modestum Pessagno and Whalen 1982 radiolarian
 Nassellaria - Ultranaporidae
Napora sp.
Napora sp. Pessagno 1977 radiolarian
 Spumellaria - Pantanelliidae
Trillus cf. elkhornensis, Pantanellium cf. buntonense, Pantanellium sp., Zartus sp.
Trillus cf. elkhornensis Pessagno and Blome 1980 radiolarian
Pantanellium sp. Pessagno 1977 radiolarian
Zartus sp. Pessagno and Blome 1980 radiolarian
 Spumellaria - Hagiastridae
Crucella sp.
Crucella sp. Pessagno 1971 radiolarian
 Spumellaria - Stylosphaeridae
Staurolonche ? sp.
Staurolonche ? sp. Haeckel 1881 radiolarian
 Spumellaria - Praeconocaryommidae
Praeconocaryomma cf. immodica, Praeconocaryomma cf. magnimamma, Praeconocaryomma aff. magnimamma, Praeconocaryomma cf. whiteavesi, Praeconocaryomma ? fasciata, Praeconocaryomma cf. parvimamma, Praeconocaryomma cf. media, Praeconocaryomma cf. decora
Praeconocaryomma cf. parvimamma Pessagno and Poisson 1981 radiolarian
Praeconocaryomma cf. media Pessagno and Poisson 1981 radiolarian
Praeconocaryomma cf. decora Yeh 1987 radiolarian
 Spumellaria - Angulobracchiidae
Paronaella sp.
Paronaella sp. Pessagno 1971 radiolarian