Early Miocene marine palynology of the Colombian Caribbean Margin: biostratigraphic and paleoceanographic implications

Cárdenas, Damián; Jaramillo, Carlos; Oboh‐Ikuenobe, Francisca E.

doi:10.1016/j.palaeo.2020.109955

Cited by 15 publications

(1 citation statement)

References 68 publications

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“…The age of the Siamaná Formation continues to be a subject of debate. Some works point to a late Oligocene age (Rollins, 1965; Cardenas et al, 2020; Jaramillo et al, 2020), while others suggest a diachronic deposition that reached the early Miocene (Duque-Caro, 1974; Teatin, 1991; Silva-Tamayo et al, 2017). Here, we follow Flórez (2020) and Flórez et al (2021) who suggested an early Miocene age based on larger benthic foraminifera, and the dating provided by Silva-Tamayo et al (2017) based on strontium isotopes of coralline algae from the same localities studied here.…”

Section: Geologic Settingmentioning

confidence: 99%

Early Miocene coral reef-associated bryozoans from Colombia. Part II: “Ascophora” Cheilostomatida

2021

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Bryozoans are common and diverse in fossil and modern coral reefs. However, studies of bryozoans in ancient reefs are generally limited, and even less is known about fossil bryozoan faunas associated with coral reefs in the Caribbean region. This is the second contribution describing the bryozoan assemblage from the early Miocene (Aquitanian) reefs of the Siamaná Formation in the La Guajira Peninsula, southern Caribbean. Here, we describe and illustrate 17 species of ascophoran-grade cheilostomes, including one new genus and three new species, Ditaxiporina colombiana n. sp., Poricella paulae n. sp., and Cycloavicularia parva n. gen. n. sp. Of the remaining fourteen taxa left in open nomenclature, one is considered confer and three affinis to species previously described, one is identified at family level, and nine at genus level. The Siamaná bryozoan fauna differs in species and colony-form composition from those associated with other paleoenvironments from Oligocene and Miocene localities of North America, the Caribbean, and Brazil. UUID: http://zoobank.org/043eadcf-0e39-4c1b-b207-f7628d6b5c84

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