Rhynchonellata - Spiriferida - Trigonotretidae
Alternative combination: Trigonotreta arthurtonensis
Full reference: J. B. Waterhouse. 1968. The classification and description of Permian Spiriferida (Brachiopoda) from New Zealand. Palaeontographica Abteilung A 129(1-3):1-94
Belongs to Neospirifer according to J. B. Waterhouse 1976
Sister taxa: Neospirifer (Neospirifer), Neospirifer amphigyus, Neospirifer amplus, Neospirifer apothescelus, Neospirifer bakeri, Neospirifer cameratiformis, Neospirifer cameratus, 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 koewbaidhoni, 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: NZGS BR 521, a valve (Ventral valve internal mold). Its type locality is GS5079, Arthurton (G45/f8613), which is in a Wuchiapingian marine horizon in the AG4 Formation of New Zealand.
Ecology: stationary epifaunal suspension feeder
Average measurements (in mm): valve 12.5 x 18.3