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Lepidodendron is an extinct genus of primitive lycopodian vascular plants belonging the order Lepidodendrales. It is well preserved and common in the fossil record. It is well preserved and common in the fossil record.
Various specimens of Lepidodendrales have been historically categorized as members of Lepidodendron, a genus defined by morphology of leaf cushions. DiMichele established Diaphorodendron to dissuade ambiguity over these widely ranging specimens, which includes some structurally preserved specimens which were previously members of Lepidodendron.
They are one of the oldest lineages of extant (living) vascular plants; the group contains extinct plants that have been dated from the Silurian (ca. 425 million years ago). [ 2 ] [ 3 ] Lycophytes were some of the dominating plant species of the Carboniferous period, and included the tree-like Lepidodendrales , some of which grew over 40 metres ...
The Paleozoic swamps had tree-like lycopsids that grew up to 30 m (98 ft), [2] and even 50 m (160 ft) in height. [3] These lycopsid plants were anchored by an extensive network of branching underground structures with root-like appendages attached to them.
This genus is known in the fossil records from as early as the Middle Devonian or the Late Carboniferous period [1] but dwindled to extinction in the Early Permian period (age range: from 383.7 to 254.0 million years ago). [2] Fossils are found in Great Britain, United States, Canada, China, Korea, Tanzania and Zimbabwe. [3]
List of extinct bird species since 1500; Lists of extinct animals; List of extinct animals of the Hawaiian Islands; List of extinct animals of Martinique and Guadeloupe; List of extinct animals of Réunion
Aptian extinction: 117 Ma: Unknown, but may be due to volcanism of the Rajmahal Traps [15] Jurassic: End-Jurassic (Tithonian) 145 Ma: No longer regarded as a major extinction but rather a series of lesser events due to bolide impacts, eruptions of flood basalts, climate change and disruptions to oceanic systems [16]
The following list is incomplete by necessity, since the majority of extinctions are thought to be undocumented, and for many others there isn't a definitive, widely accepted last, or most recent record. According to the species-area theory, the present rate of extinction may be up to 140,000 species per year. [1]