Margot Guerra-Sommer, Brazilian palaeobotanist (Bento Gonçalves, Rio Grande do Sul State 12 March 1948 –

First to describe dynamics of white rot fungal decay in a petrified conifer branch

With A.C.S. Santos, I. Degani-Schmidt, A.M. Siegloch, I.S. Carvalho, J.G. Mendonça Filho & J.O. Mendonça. Fungus-plant interactions in Aptian Tropical Equatorial Hot arid belt: white rot in araucarian wood from Crato fossil Lagersträtte (Araripe Basin, Brazil). Cret. Res. 114, 2020

DESCRIBED FOSSIL PLANTAE TAXA

Genera

Coricladus 2005 with Jasper e Ricardi-Branco

Franscinella 2025 with Carniere, Pozzebon-Silva, Spiekermann, Leandro, Uhl & Jasper

Iratinia 2021 with Spiekermann, Jasper, Siegloch & Uhl

Sommerxylon Pires & Guerra Sommer 2004

Species

Agathoxylon santanensis 2021 with Santos, Siegloch, Degani-Schmidt & Carvalho

Barakaroxylon brasiliense 1976

Buriadia isophylla 1982 with Bortoluzzi

Coricladus quiteriensis 2005 with Jasper e Ricardi-Branco

Glossopteris brasiliensis 1992

Glossopteris pubescens 1992

Glossopteris riograndensis 1992

Glossopteris similisintermittens 1992

Hepaticites iporangae 2011 with Ricardi-Branco, Faria & Jasper

Iratinia australis 2021 with Spiekermann, Jasper, Siegloch & Uhl

Lycopodites riograndensis 2008 with Salvi, Jasper, Ricardi-Branco & Bernardes de Oliveira

Noeggerathiopsis brasiliensis 2019

Nothostigma sepeensis 2023 with Spiekerman, Jasper, Pozzebon-Silva, Carniere, Benicio & Uhl

Paulistoxylon iratiensis 1977

Petalopitys bortoluzzii 1975

Polysolenoxylon bageense 1973,

Polysolenoxylon resiniferum 1974,

Scleromedulloxylon batoviense 1976

Sommerxylon spiralosus 2004 with Pires

HONORS

Sommerxylon Pires & Guerra Sommer 2004 (Fossil Plantae)