Rhynchonellata - Spiriferida - Trigonotretidae
Full reference: J. Yanagida. 1967. Early Permian brachiopods from north-central Thailand. Geology and Paleontology of Southeast Asia 3:46-97
Belongs to Neospirifer according to A. Pérez-Huerta et al. 2007
Sister taxa: Neospirifer (Neospirifer), Neospirifer amphigyus, Neospirifer amplus, Neospirifer apothescelus, Neospirifer arthurtonensis, Neospirifer bakeri, Neospirifer cameratiformis, Neospirifer cameratus, Neospirifer campbelli, Neospirifer chivatschensis, Neospirifer concentricus, Neospirifer crassiconchialis, Neospirifer dunbari, Neospirifer fasciger, Neospirifer foordi, Neospirifer formulosus, Neospirifer goreii, Neospirifer gortani, Neospirifer grandis, Neospirifer grandis, Neospirifer groenwalli, Neospirifer huecoensis, Neospirifer incipiens, Neospirifer invisus, Neospirifer kansasensis, Neospirifer kimsari, Neospirifer lanceolatus, Neospirifer latus, Neospirifer licharewi, Neospirifer mansuetus, Neospirifer mengjiushanensis, Neospirifer neali, Neospirifer neocameratus, Neospirifer neostriatus, Neospirifer notialis, Neospirifer omolonensis, Neospirifer orientalis, Neospirifer paranitiensis, Neospirifer parenensis, Neospirifer permicus, Neospirifer placidus, Neospirifer plana, Neospirifer praenuntius, Neospirifer pseudonitiensis, Neospirifer rhomboidalis, Neospirifer rhomboides, Neospirifer shenshuensis, Neospirifer snjatkovi, Neospirifer sodalis, Neospirifer sterlitamakensis, Neospirifer striatus, Neospirifer subfasciger, Neospirifer subovalis, Neospirifer sulcoprofundus, Neospirifer tajmyrica, Neospirifer tegulatus, Neospirifer texanus, Neospirifer tricostatus, Neospirifer trimuensis, Neospirifer triplicatus, Neospirifer undatus, Neospirifer vagaensis, Neospirifer venezuelensis, Neospirifer wynneiformis, Wadispirifer ravana, Wadispirifer hongdeensis
Type specimen: GK-D 31264. Its type locality is Tham Nam Maholan, Ban Nong Hin, Changwat Loei, which is in an Asselian carbonate limestone in Thailand.
Ecology: stationary epifaunal suspension feeder
Average measurements (in mm): shell 45.0 x 54.0, valve 39.0 x 58.1