Silurian Leptaeninae (Brachiopoda) from Gotland, Sweden |
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Authors: | Ole A Hoel |
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Institution: | 1. Institute for Geosciences, Department of Paleobiology, Uppsala University, Norbyv?gen 22, SE-752 36, Uppsala, Sweden
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Abstract: | Strophomenid brachiopods belonging to the generaLeptaena andLepidoleptaena are described from the uppermost Llandovery — Ludlow succession of Gotland, Sweden. In Gotland,Lepidoleptaena comprises the single speciesL. poulseni, andLeptaena includes four species:L. rhomboidalis, L. sperion, L. depressa andL. parvirugata n. sp.L. depressa shows a considerable amount of morphological variation, which is recognised in the two new subspeciesLeptaena depressa visbyensis n. ssp. from the Llandoverian — Wenlockian Visby Formation, andL. depressa lata n. ssp. from the mid-Wenlockian Slite Group. The distribution of the different species is largely substrate-dependent, withLeptaena rhomboidalis andLepidoleptaena poulseni adapted to high-energy environments with firm substrates, whereas the remaining species preferred fine-grained substrates
in low-energy environments.
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Keywords: | Silurian Gotland Brachiopoda Strophomenida Leptaeninae Leptaena Lepidoleptaena |
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