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<p>This study presents an updated molecular phylogeny of <i>Allographa</i>, including 5 new species and 5 known species from the Western Ghats of India. Utilizing mtSSU, nrLSU and <i>RPB2</i> as molecular markers, we evaluated species boundaries and evolutionary relationships within the genus. The newly described species are: <i>A. persistinspersa</i>, differing from <i>A. altamirensis</i> in having a hymenium inspersion which persists in KOH (type A) and slightly broader, regularly muriform ascospores; <i>A. semicarbonisata</i>, differing from <i>Graphis subintermedians</i> in having an apically to laterally carbonized exciple, 1–2 ascospores per ascus, and larger ascospores; <i>A. keralensis</i>, differing from <i>G. nigroglauca</i> in having a complete thalline margin; <i>A. nayakae</i>, differing from <i>A. macella</i> in having elongate, irregularly branched, erumpent lirellae; and<i> A. paraconsanguinea</i>, differing from <i>A. calcea</i> in having an entire, laterally carbonized exciple and (1) 2–8 spored asci. New data on the phylogenetic placement of <i>A. calcea</i> and <i>A. macella</i> are also given. We further include a list of <i>Allographa</i> species reported from the Western Ghats, along with the availability of molecular sequence data.</p>

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Revisiting Allographa (Graphidales, Graphidaceae) from the Western Ghats, India

  • 期刊论文

  • 发表日期：

    2026年5月8日

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  • Parayelil A. Ansil,
  • Kunhiraman C. Rajeshkumar,
  • Robert Lücking,
  • Bharati Sharma

摘要

This study presents an updated molecular phylogeny of Allographa, including 5 new species and 5 known species from the Western Ghats of India. Utilizing mtSSU, nrLSU and RPB2 as molecular markers, we evaluated species boundaries and evolutionary relationships within the genus. The newly described species are: A. persistinspersa, differing from A. altamirensis in having a hymenium inspersion which persists in KOH (type A) and slightly broader, regularly muriform ascospores; A. semicarbonisata, differing from Graphis subintermedians in having an apically to laterally carbonized exciple, 1–2 ascospores per ascus, and larger ascospores; A. keralensis, differing from G. nigroglauca in having a complete thalline margin; A. nayakae, differing from A. macella in having elongate, irregularly branched, erumpent lirellae; and A. paraconsanguinea, differing from A. calcea in having an entire, laterally carbonized exciple and (1) 2–8 spored asci. New data on the phylogenetic placement of A. calcea and A. macella are also given. We further include a list of Allographa species reported from the Western Ghats, along with the availability of molecular sequence data.