WoRMS source details
Lommerzheim, André. (1981). Paläozäne Serpulidae und Spirorbidae (Polychaeta) von den Emperor Seamounts, NW-Pazifik. Zitteliana. Abhandlungen der Bayerischen Staatssammlung für Paläontologie und historische Geologie. 7: 31-54.
50866
Lommerzheim, André
1981
Paläozäne Serpulidae und Spirorbidae (Polychaeta) von den Emperor Seamounts, NW-Pazifik.
Zitteliana. Abhandlungen der Bayerischen Staatssammlung für Paläontologie und historische Geologie
7: 31-54
Publication
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[English abstract:]
Faunas of Serpulidae and Spirorbidae are described from Middle Paleocene sediments of the deep sea drillings 430 and 433 A-C (DSDP Leg 55) in the northwestern Pacific. These drillings exposed deposits of two atoll islands. Effects of ecological conditions are connected with the faunal assemblages. In the first lagoon more or less normal marine conditions are found. The soft sediments offered unfavourable settling conditions for Serpulidae (Serpulinae and Filograninae). Contrary to this, the faunas of Spirorbidae, rich of species and individuals, which also can settle soft substrates, met a better realm on algal floras. Extreme environmental conditions existed in the second lagoon, which was hypersaline, at least temporarily. Serpulidae are almost absent and monotypical faunas of Spirorbidae are only found in some distinct horizons.
The poorly preserved faunas of Serpulidae (Filograninae and Serpulinae) cannot be identified with certainty; in part, they probably belong to the genera Pomatoceros and Hydroides. The faunas of Spirorbidae are striking due to their „modern“ features. Nearly all morphospecies have similar recent forms. So definition of the morphospecies is problematic. Circeis paleocaenicum n. sp. resembles the Recent C. armoricana fragilis Knight-Jones & Knight-Jones. Janua (Dexiospira) quasiacuta n. sp. is separated from the Recent J. (D.) preacuta Vine mainly because of differences in the tubes. Metalaeospira pileoformis n. sp. differs from the Recent M. tenuis Knight-Jones mainly by the presence of finely keeled tubes. Paralaeospira clavaeformis n. sp. is distinguished by its dextral coiling and the characteristically club-shaped operculum. Cubiculovinea communis n. sp. is the type species of the new genus Cubiculovinea with a completely calcified brood chamber. Some isolated opercula (Janua [Dexiospira] cf. pseudocorrugata (Bush]) could not clearly be separated from Recent forms. Opercula are unknown in Circeis ? sp. (cingulata-growth), Janua ? bilineata (Schmidt) and Bipygmaeus sp.
Faunas of Serpulidae and Spirorbidae are described from Middle Paleocene sediments of the deep sea drillings 430 and 433 A-C (DSDP Leg 55) in the northwestern Pacific. These drillings exposed deposits of two atoll islands. Effects of ecological conditions are connected with the faunal assemblages. In the first lagoon more or less normal marine conditions are found. The soft sediments offered unfavourable settling conditions for Serpulidae (Serpulinae and Filograninae). Contrary to this, the faunas of Spirorbidae, rich of species and individuals, which also can settle soft substrates, met a better realm on algal floras. Extreme environmental conditions existed in the second lagoon, which was hypersaline, at least temporarily. Serpulidae are almost absent and monotypical faunas of Spirorbidae are only found in some distinct horizons.
The poorly preserved faunas of Serpulidae (Filograninae and Serpulinae) cannot be identified with certainty; in part, they probably belong to the genera Pomatoceros and Hydroides. The faunas of Spirorbidae are striking due to their „modern“ features. Nearly all morphospecies have similar recent forms. So definition of the morphospecies is problematic. Circeis paleocaenicum n. sp. resembles the Recent C. armoricana fragilis Knight-Jones & Knight-Jones. Janua (Dexiospira) quasiacuta n. sp. is separated from the Recent J. (D.) preacuta Vine mainly because of differences in the tubes. Metalaeospira pileoformis n. sp. differs from the Recent M. tenuis Knight-Jones mainly by the presence of finely keeled tubes. Paralaeospira clavaeformis n. sp. is distinguished by its dextral coiling and the characteristically club-shaped operculum. Cubiculovinea communis n. sp. is the type species of the new genus Cubiculovinea with a completely calcified brood chamber. Some isolated opercula (Janua [Dexiospira] cf. pseudocorrugata (Bush]) could not clearly be separated from Recent forms. Opercula are unknown in Circeis ? sp. (cingulata-growth), Janua ? bilineata (Schmidt) and Bipygmaeus sp.
Pacific Ocean
Pacific, North West (= Warm + cold temperate (boreal))
Pacific, North West (= Warm + cold temperate (boreal))
Paleontology, Fossils, Paleobiology
Systematics, Taxonomy
Systematics, Taxonomy
Circeis paleocaenicum Lommerzheim, 1981 † (original description)
Cubiculovinea Lommerzheim, 1981 † (original description)
Cubiculovinea communis Lommerzheim, 1981 † (original description)
Janua (Dexiospira) quasiacuta Lommerzheim, 1981 † (original description)
Janua bilineata (Schmidt, 1951) † (new combination reference)
Metalaeospira pileoformis Lommerzheim, 1981 † (original description)
Paralaeospira clavaeformis Lommerzheim, 1981 † (original description)
Cubiculovinea Lommerzheim, 1981 † (original description)
Cubiculovinea communis Lommerzheim, 1981 † (original description)
Janua (Dexiospira) quasiacuta Lommerzheim, 1981 † (original description)
Janua bilineata (Schmidt, 1951) † (new combination reference)
Metalaeospira pileoformis Lommerzheim, 1981 † (original description)
Paralaeospira clavaeformis Lommerzheim, 1981 † (original description)
