Three new species of Krogia (Ramalinaceae, lichenised Ascomycota) from the Paleotropics.

Sonja Kistenich,Einar Timdal,Patricia A Wolseley,Holger Thüs,Charles S Vairappan,Jouko K Rikkinen

doi:10.3897/mycokeys.40.26025

Sonja Kistenich, Einar Timdal + Show 4 more

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https://doi.org/10.3897/mycokeys.40.26025

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Abstract

Krogiaborneensis Kistenich & Timdal, K.isidiata Kistenich & Timdal and K.macrophylla Kistenich & Timdal are described as new species, the first from Borneo and the two latter from New Caledonia. The new species are supported by morphology, secondary chemistry and DNA sequence data. Krogiaborneensis and K.isidiata contain sekikaic and homosekikaic acid, both compounds reported here for the first time from the genus. Krogiamacrophylla contains an unknown compound apparently related to boninic acid as the major compound. DNA sequences (mtSSU and nrITS) are provided for the first time for Krogia and a phylogeny of the genus based on 15 accessions of five of the six accepted species is presented. Krogiaantillarum is reported as new to Brazil, Guatemala and Mexico.

Highlights

Krogia Timdal is a corticolous genus occurring in tropical humid forests and rainforests
The specimens of the three new species were discovered during ongoing global studies of Phyllopsora by Kistenich and Timdal in material provided by Rikkinen (New Caledonia) and Thüs, Vairappan and Wolseley (Borneo), with additional specimens provided by A
We identified four lichen substances: 4-O-methylcryptochlorophaeic acid, sekikaic acid and homosekikaic acid and boninic acid

Summary

Introduction

Krogia Timdal is a corticolous genus occurring in tropical humid forests and rainforests. It closely resembles the much more common genus Phyllopsora Müll. Arg. in thallus morphology, but differs mainly in having a weak or absent amyloid reaction in the tholus of the asci and filiform, curved ascospores that are spirally arranged in the ascus (Timdal 2002). In Phyllopsora, the tholus shows a deeply amyloid conical structure (Bacidia-type) and the ascospores vary from ellipsoid to acicular, but are never spirally arranged. Three species of Krogia are known: K. antillarum Timdal (the West Indies; Timdal 2009), K. coralloides Timdal (Mauritius; Timdal 2002) and K. microphylla Timdal (the Dominican Republic; Lumbsch et al 2011). All species are recently discovered and known from only a few collections

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