original description
Schmidt, O. (1852). Neue Rhabdocoelen aus dem nordischen und dem Adriatischen Meere. <em>Sitzungsberichte der mathematisch-naturwissenschaftlichen Classe der Kaiserlichen Akademie der Wissenschaften.</em> 9: 490–505. With 5 plates. [details] 
original description
(of Hyporhynchus Graff, 1882) Graff, L., von. (1882). Monographie der Turbellarien 1. Rhabdocoelida. <em>[Book].</em> 1-442, Verlag Wilhelm Engelmann, Leipzig., available online at https://books.google.com/books/about/Monographie_der_Turbellarien.html?id=LT0hAQAAMAAJ
page(s): 336–337 [details] 
taxonomy source
Willems, W.; Artois,T.; Vermin, W.; Schockaert, E. (2004). Revision of Trigonostomum Schmidt, 1852 (Platyhelminthes, Typhloplanoida, Trigonostomidae) with the description of seven new species. <em>Zoological Journal of the Linnean Society.</em> 141(2): 271-296. [details] Available for editors 
context source (PeRMS)
Velásquez-Rodriguez, K.; Reyes, J.; Van Steenkiste, N. ; Severino, R.; Brusa, F. (2023). First records of marine microturbellarians (Platyhelminthes: Rhabdocoela, Fecampiida and Prolecithophora) from Peru, with the description of a new species. <em>Zootaxa.</em> 5258(5): 501-523., available online at https://doi.org/10.11646/zootaxa.5258.5.1 [details] Available for editors 
basis of record
Faubel, A.; Noreña, C. (2001). Turbellaria, <B><I>in</I></B>: Costello, M.J. <i>et al.</i> (Ed.) (2001). <i>European register of marine species: a check-list of the marine species in Europe and a bibliography of guides to their identification. Collection Patrimoines Naturels,</i> 50: pp. 123-136 (look up in IMIS) [details] Available for editors 
additional source
Vanstraelen, L.; Artois, T.; Backeljau, T.; Kmentova, N.; Geraerts, M.; Monnens, M. (2025). A Scanning Electron Microscopy Method to Visualise the Copulatory Organ Morphology of Microturbellarian Flatworms: Trigonostomum Schmidt, 1852 as a Case Study. <em>Journal of Morphology.</em> 286:e70040., available online at https://doi.org/10.1002/jmor.70040 [details] Available for editors 
Present
Inaccurate
Introduced: alien
Containing type locality
From editor or global species database