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Abstract Detail

Paleobotanical Section

Hernandez Damian, Ana [1], Calvillo-Canadell, Laura [2], Cevallos-Ferriz, Sergio [3].

Flowers preserved in Miocene amber from Simojovel de Allende, Chiapas, Mexico, with affinity to Acalyphoideae (Euphorbiaceae).

Two fossils flowers preserved in amber from Simojovel de Allende, Chiapas, Mexico, have morphological characteristics that allow their inclusion in Euphorbiaceae. They are unisexual (staminate), actinomorphic and inconspicuous, composed of three sepals and lack petals, have free stamens (10-13) with apicular, bithecal anthers, and interstaminal lobed and hairy gland disk. This flower construction is suggestive of Acalypohoideae, where characters are diagnostic of different paleotropical tribes (Radcliffe-Smith, 2001) like Dyscoglypremna, Alchorneopsis (Caryodendreae), Chondrostylis (Agrostistachydeae) Necepsia, Paranecepsia, Amyrea, Discocleidon (Bernardieae), Blumeodendron, Podadenia, Ptychopyxis (Pycnocomeae), Crotonoginopsis (Adelieae), Claoxylon, Erythrococca, Micrococca, Mareya, Lobanilia (Acalypheae). To further tight taxonomical affinities of the fossil material a cladistic analysis based on 47 qualitative and quantitative characters and 35 species was performed. Preliminary results suggest that the fossil resemble members of Bernardieae and Acalypheae. Their presence in the Miocene of southern Mexico reinforces the evidence supporting that paleotropical lineages have a long history in Mexico, as suggested by other Paleogene plants.

Broader Impacts:

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1 - Universidad Nacional Autónoma de México, Posgrado en Ciencias Biológicas, Ciudad Universitaria, Copilco El Alto, Coyoacan, Mexico D.F., 04510, Mexico
2 - Instituto De Geología, UNAM, Circuito De La Investigación, Ciudad Universitaria, Coyoacan, N/A, 04510, Mexico
3 - Instituto De Geología, UNAM, Department of Palentology, Ciudad Univwersitaria, Coyoacan, MEXICO D.F., N/A, 01900, Mexico

none specified

Presentation Type: Oral Paper:Papers for Sections
Session: 3
Location: Melrose/Riverside Hilton
Date: Monday, July 29th, 2013
Time: 10:45 AM
Number: 3010
Abstract ID:690
Candidate for Awards:Isabel Cookson Award,Maynard F. Moseley Award

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