Alternative spelling: Diplotmema
Synonym: Rhodes Ettingshausen 1875
Parent taxon: Pteridospermophyta according to H. N. Andrews 1970
Sister taxa: Albertlongia, Angaropteris, Bardia, Bilignea, Boulaya, Brongniartites, Buteoxylonales, Calathiops, Calathospermum, Calymmatotheca, Camptosperma, Canipa, Cephalopteris, Chapelia, Coseleya, Crossotheca, Dictyoxylon, Dimeripteris, Diplotheca, Dolichosperma, Eccroutosperma, Eltovaria, Emplectopteris, Eurystoma, Geminitheca, Genomosperma, Gimmia, Girtya, Glossophyllaceae, Gnetopsis, Heterangium, Heterotheca, Hoegia, Hydrasperma, Hymenotheca, Ilfeldia, Jongmansis, Kegelidium, Kurtziana, Lacoea, Lagenospermum, Lagenostoma, Lithangium, Lyginorachis, Megaloxylon, Microspermopteris, Nudospermum, Nystroemia, Ootheca, Paracalathiops, Paragonorrachis, Perezlaria, Periastron, Physostoma, Pteridozamites, Rhetinangium, Rotodontiospermum, Runcaria, Salpingostoma, Schopfiastrum, Simplotheca, Spermolithus, Spermopteris, Sphaerostoma, Sphenoxylon, Stamnostoma, Staphylotheca, Stenokoleos, Syncrama, Tantallosperma, Telangium, Tetrastichia, Tristichia, Tyliosperma, Unguitheca, Utkalia, Yakia, Zimmermannitheca
Subtaxa: Diplothmema gothanica Diplothmema patentissimum
Type: Rhodes patentissima
Ecology: "photoautotroph"
Distribution:
• Permian of United States (3: Oklahoma, Texas collections)
• Namurian of Türkiye (1)
• Carboniferous of Brazil (1), Canada (8: New Brunswick, Newfoundland and Labrador, Nova Scotia), Peru (1), the United Kingdom (1), United States (8: Alabama, Colorado, Illinois, Indiana, Michigan, Missouri, Utah)
• Devonian of Belgium (1)
Total: 24 collections including 28 occurrences
Specimen images are retrieved through the ePANDDA API.
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