期刊
HISTORICAL BIOLOGY
卷 25, 期 5-6, 页码 691-696出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/08912963.2012.742891
关键词
Tertiary grass; Greater Antilles; Hispaniola; fossilised resin
Alaristasuccinagen. et sp. nov. (Poaceae) is described from a single floret preserved in amber of Tertiary age originating from the Dominican Republic. The new genus is characterised by (1) a narrow-winged lemma awn, (2) numerous (as many as 17) lemma nerves, (3) a lengthy rachilla internode (implying a lax spikelet), (4) sinuous-margined long cells, (5) silica cells arranged transversely, (6) stomatal subsidiaries low domed and (7) papillae. The epidermal features are characteristic of the abaxial leaf blade surface of members of the Bambusoideae and the fossil is placed in this group.
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