Simone H.J.J. Louwhoff; John A. Elix:

Hypotrachyna (Parmeliaceae) and allied genera in Papua New Guinea

2002. 149 pages, 76 figures, 14x22cm, 310 g
Language: English

(Bibliotheca Lichenologica, Band 81)

ISBN 978-3-443-58060-5, paperback, price: 58.00 €

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HypotrachynaParmeliaceaePapua New Guinea


Synopsis top ↑

A revision of the lichen genus Hypotrachyna (Ascomycotina: Parmeliaceae) in Papua New Guinea has shown it to comprise 39 species. Five species are described as new to science: Hypotrachyna hnatiukii, H. lichesterinica, H. malesiana, H. monticola and H. munduai. Six species are new records for Papua New Guinea namely, Hypotrachyna adjuncta, H. andensis, H. galbinica, H. immaculata, H. kayaensis and H. peruviana. Nine of the 39 species are considered endemic to Papua New Guinea. A key and descriptions of the species are given, and the synonymy, chemistry, distribution, ecology and taxonomic affinities of each species discussed. In addition, two species of Myelochroa, one species of Parmelinella and seven species of Parmelinopsis have been identified from Papua New Guinea, and these are also described. Parmelinopsis afrorevoluta and P. protocetmrica are reported for the first time from Papua New Guinea.

Rev.: Persoonia vol. 18, part 1, 2002 top ↑

This book gives an account of the lichen genus Hypotrachyna (Ascomycetes, Parmeliaceae) in Papua New Giunea. This genus, which has a pan-tropical montane distribution, with emphasis on South America, counts after revision 39 species in the area concerned. Five species are described as new, and six species represent new records for Papua New Guinea. After a short introduction, a survey is given of the morphology and interspecific variation within the genus, including also chemical characters. The taxonomic part comprises a key to the species and full descriptions of the accepted species, inclusive nomenclator and data on ecology and distribution. Often black-and-white photographs and/or distribution maps are provided. The book concludes with an extensive list of references. This monograph adds substantially to the knowledge of the lichen flora of this remote part of the world.

Persoonia vol. 18, part 1, 2002

Rev.: Mycotaxon vol. LXXXIII, July-September 2002, p. 506 top ↑

Hypotrachyna and Parmotrema are the most speciose parmelioid genera in the tropics. Parmotrema in Papua New Guinea was treated by the authors in 1999 (Louwhoff & Elix 1999), and the present title is the counterpart on Hypotrachyna. The work starts with a detailed history of the shifting taxonomic opinions on the rank and position of these lichens, and also an overview of the characters used in their classification. They state that 'phylogenetic analyses and molecular studies have largely supported the existing generic classification of the Parmeliaceae' (p. 10), but while that is true for some genera, more recent molecular work than that cited suggests that the generic concept of genera such as Hypotrachyna needs to be reassessed (Crespo et al. 2001).

This account, based on about 400 collections made by P. Diederich, H. Streiman, H. J. M. Sipman and J. A. Elix, also treats Myelochroa, Parmelinella, and Parmelin-opsis, genera largely separated on the basis of the nature of cilia and rhizines. The species in the four genera are keyed out in a single key in which chemical characters have a pre-eminent role. Treatments of individual species are excellent, including citations of the original literature and types, full morphological descriptions as well as data on chemistry, distribution and habitat, references to illustrations, notes, and full details of specimens studied. Habit photographs (half-tones) and distribution maps are also provided

In all, 49 species are accepted from the country, of which six are described as new. As many of the species have wide distributions. not only in the tropics but some extending into temperate regions, this work will be of interest to a wide spectrum of lichenologists.

Dr. David L. Hawksworth

Mycotaxon vol. LXXXIII, July-September 2002, p. 506

Contents top ↑

Summary 7
Introduction 8

The genus Hypotrachyna 9
Intergeneric Comparisons 10
Interspecific Variation - Morphology and Anatomy 13
Interspecific Variation - Chemistry 20
Geographic Affinities 24
Material and Methods 25
Key to the Species of Hypotrachyna, Myelochroa, Parmelinella and
Parmelinopsis in Papua New Guinea 27
Hypotrachyna - the Genus 31
The Species
1. H. addita 31
2. H. adducta 32
3. H. adjuncta 36
4. H. andensis 37
5. H. brevirhiza 40
6. H. consimilis 41
7. H. corneola 44
8. H. costaricensis 45
9. H. endochlora 48
10. H. exsecta 51
11. H. galbinica 53
12. H. hnatiukii 55
13. H. imbricatula 58
14. H. immaculata 59
15. H. koypensis 62
16. H. lichesterinica 63
17. H. majoris 64

18. H. malesiana 67
19. H. meyeri 69
20. H. microblasta 71
21. H. monticola 74
22. H. munduai 75
23. H. neodigitata 78
24. H. orientalis 79
25. H. osseoalba 82
26. H. peruviana 86
27. H. pseudosinuosa 87
28. H. quaesita 90
30. H. reducens 94

31. H. revoluta 96
32. H. rockii 99
33. H. simbuensis 101
34. H. sinuosa 102
35. H. subphysodalica 105
36. H. tariensis : 106
37. H. terricola 108
38. H. toiana 112
39. H. woitapensis 113
Myelochroa - the Genus 115
1. M. aurulenta 115
2. M. nothofagi 117
Parmelinella - the Genus 120
1. P. wallichiann 120
Parmelinopsis - the Genus 123
1. P. afrorevoluta 123
2. P. cryptochlora 126
3. P. horrescens 127
4. P. minarum 129
5. P. protocefrarica 131
6. P. spumosa 133
7. P. subfatiscens 135
Acknowledgements 138
References 139
Taxonomic Index 146
Index of Figures 150