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A revised generic classification of the jelly lichens, Collemataceae

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Abstract

Phylogenetic studies have shown the need for a revised circumscription of generic boundaries in the jelly lichens (Collemataceae). Using a four-marker dataset from a recently published phylogeny of Collemataceae, we tested the monophyly of ten morphologically well-characterized groups. To achieve this, we performed Bayesian and maximum likelihood analyses. The monophyly of the ten morphological groups was confirmed. In order to reconcile molecular and morphological data into a formal classification, we here propose new generic delimitations in Collemataceae. Collema and Leptogium are re-circumscribed and six old generic names are resurrected to accommodate the Collema Crispum-group (Blennothallia), the Collema Tenax-group (Enchylium), the Collema Cristatum-group (Lathagrium), the Collema Occultatum-group (Rostania), the former small Leptogium species (Scytinium), and Leptogium diffractum (Pseudoleptogium). In addition, two new genera are described to accommodate Collema multipartitum (Callome) and the Collema Italicum-group (Paracollema). The presence/absence of a eucortex, which was earlier used as the cardinal character to define genera in the family, is still useful, but only in combination with other traits such as thallus habit (size), lobe size, ascospore characteristics, thallus anatomical structure, and habitat preference. A key to the genera is provided. Lectotypes are designated for Collema marginale Hoffm., Synechoblastus nigrescens (Huds.) Trevis., Eucollema (Cromb.) Horw., Collema section Enchylium Ach., Collema section Lathagrium Ach., Collema sect. Mallotium Ach., Collema section Scytinium Ach., Collemodium Nyl. ex Lamy, and Homodium Nyl. ex Olivier.

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Acknowledgments

We thank E. Timdal for kindly authorize us to use photographs published in (http://nhm2.uio.no/botanisk/lav/Photo_Gallery/). M. Prieto is gratefully thanked for providing the habit photo of Leptogium phyllocarpum. J. Klackenberg kindly gave very helpful advice on scientific names and Latin grammar. Two anonymous reviewers provided constructive comments and suggestions. All errors, however, are entirely our own. This research was generously supported by the Swedish Research Council grants VR 621-2009-5372 and VR 621-2012-3990, and by a postdoctoral grant from the Spanish Ministry of Education and Science (EDU3495/2010).

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Authors and Affiliations

  1. Department of Botany, Swedish Museum of Natural History, P.O. Box 50007, SE-104 05, Stockholm, Sweden

    Mónica A. G. Otálora & Mats Wedin

  2. Department of Natural History, Bergen University Museum, Allégt. 41, Box 7800, 5020, Bergen, Norway

    Per M. Jørgensen

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  1. Mónica A. G. Otálora
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  2. Per M. Jørgensen
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  3. Mats Wedin
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Correspondence to Mónica A. G. Otálora.

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Otálora, M.A.G., Jørgensen, P.M. & Wedin, M. A revised generic classification of the jelly lichens, Collemataceae . Fungal Diversity 64, 275–293 (2014). https://doi.org/10.1007/s13225-013-0266-1

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