Original paper
Mesozoic sponges of the Pucará Group, Peru
Senowbari-Daryan, Baba
Palaeontographica Abteilung A Band 233 Lieferung 1-6 (1994), p. 57 - 74
37 references
published: Nov 22, 1994
Abstract
The Pucará Group of central Peru represents nearly 3,000 m of shallow-water carbonate deposition spanning from the Late Triassic to Middle Jurassic in time. The Upper Triassic carbonate rocks, the Chambara Formation, and the Jurassic units, the Aramachay and Condorsinga Formations, exhibit distinctive associations of sponges, which are described in this paper. From the Triassic succession of Huanincocha near the Lake Junin in central Peru three genera of inozoan sponges, including Eusiphonella, Corynella and Peronidella and two genera of sphinctozoan sponges, Amblysiphonella and Colospongia have been found. Amblysiphonella tubifera is described as a new species. A specimen of Colospongia was observed in the field but not collected. Jurassic sponges were collected from several localities southeast of the town of Cerro de Pasco in central Peru. The Carhuazcocha locality south of the town of Junin contains the most diverse sponge fauna including the following described taxa: Stellispongiella ? juninensis n. sp.; Stellispongiella ? ramosa n. sp.; Stellispongiella ? minor n. sp.; Trammeria dendroida n. gen., n. sp.; Cornuaspongia longidepressa n. gen., n. sp.; Cornuaspongia reticulata n. gen., n. sp. Neither the Triassic nor the Jurassic sponge associations of Peru, are known from other Triassic or Jurassic localities of the world.
Keywords
Sponges • systematic paleontology • Triassic • Jurassic • Peru