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Patterns of peristome reduction and ornamentation in African Entodontaceae

Kungu, E.M., Bonner, L. and Longton, R.E. (2003) Patterns of peristome reduction and ornamentation in African Entodontaceae. Journal of the Hattori Botanical Laboratory, 93. pp. 223-246. ISSN 0073-0912

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The Entodontaceae is characterised by erect capsules with inset and substantially reduced peristomes. Differences in peristome morphology and ornamentation delimit both genera and species within the family. The Entodontaceae, as presently recognised, consists of four genera, Entodon, Erythrodontium, Mesonodon and Pylaisiobryum, which show a variety of peristome ornamentation patterns, and exhibit differing levels of peristome reduction. This variation encompasses an unusual combination of structurally reduced peristomes, which retain massive exostome ornamentation, and residual peristome function. As part of a taxonomic revision of the family in Africa, generic patterns of peristome reduction and ornamentation are described. Inter- and intra-specific variation patterns of both the exostome and endostome have been investigated using detailed SEM studies of material from Africa and beyond. Structural reduction of the peristome is associated with high levels of intra-specific variation in peristome ornamentation patterns. Common trends in these patterns of variation are identified within the family. Putative hybrid sporophytes have been identified in Entodon, and the taxonomic implications of these observations are considered for a family where species delimitation has in the past often depended on minor variation in peristome structure or ornamentation patterns. (author abst.)

Item Type:Article
Divisions:Life Sciences > School of Biological Sciences
ID Code:10801

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