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Ptychotrygon triangularis
Taxonomy
Ptychodus triangularis was named by Reuss (1845).
It was synonymized subjectively with Ptychotrygon vermiculata by Case and Schwimmer (1988); it was recombined as Ptychotrygon triangularis by Cappetta (1973), Cappetta and Case (1975), Herman (1977), Wolberg (1985), Wolberg (1985), Williamson et al. (1989), Manning and Dockery (1992), Stewart and Martin (1993), Williamson et al. (1993), Cappetta and Case (1999), Case et al. (2001), Zalmout and Mustafa (2001), Johnson and Lucas (2003), Cicimurri (2004), Spielmann et al. (2009), Kriwet et al. (2009), Becker et al. (2010), Hamm and Cicimurri (2011), Schubert et al. (2017), Maisch et al. (2021), Salvino et al. (2025), Juranek and Shimada (2025).
It was synonymized subjectively with Ptychotrygon vermiculata by Case and Schwimmer (1988); it was recombined as Ptychotrygon triangularis by Cappetta (1973), Cappetta and Case (1975), Herman (1977), Wolberg (1985), Wolberg (1985), Williamson et al. (1989), Manning and Dockery (1992), Stewart and Martin (1993), Williamson et al. (1993), Cappetta and Case (1999), Case et al. (2001), Zalmout and Mustafa (2001), Johnson and Lucas (2003), Cicimurri (2004), Spielmann et al. (2009), Kriwet et al. (2009), Becker et al. (2010), Hamm and Cicimurri (2011), Schubert et al. (2017), Maisch et al. (2021), Salvino et al. (2025), Juranek and Shimada (2025).
Synonymy list
| Year | Name and author |
|---|---|
| 1845 | Ptychodus triangularis Reuss |
| 1973 | Ptychotrygon triangularis Cappetta p. 511 figs. Pl 2, figs 1-6 |
| 1975 | Ptychotrygon triangularis Cappetta and Case p. 295 |
| 1977 | Ptychotrygon triangularis Herman p. 298 figs. Pl 15, fig 4 |
| 1985 | Ptychotrygon triangularis Wolberg p. 6 figs. 5C-H,R-U |
| 1989 | Ptychotrygon triangularis Williamson et al. p. 241 figs. 3H-K |
| 1992 | Ptychotrygon triangularis Manning and Dockery p. 11 figs. Pl 7, figs 1,2 |
| 1993 | Ptychotrygon triangularis Stewart and Martin p. 244 fig. 1b |
| 1993 | Ptychotrygon triangularis Williamson et al. p. 462 fig. 12 |
| 1999 | Ptychotrygon triangularis Cappetta and Case p. 40 figs. Pl 26, figs 1-8 |
| 2001 | Ptychotrygon triangularis Case et al. p. 96 figs. Pl 6, figs 114,115 |
| 2001 | Ptychotrygon triangularis Zalmout and Mustafa p. 401 figs. Pl 5, figs 7,8 |
| 2003 | Ptychotrygon triangularis Johnson and Lucas p. 355 figs. 2M-P |
| 2004 | Ptychotrygon triangularis Cicimurri p. 11 fig. 5M |
| 2009 | Ptychotrygon triangularis Kriwet et al. p. 333 |
| 2009 | Ptychotrygon triangularis Spielmann et al. p. 317 fig. 2S,T |
| 2010 | Ptychotrygon triangularis Becker et al. p. 261 figs. 7.7-7.12 |
| 2011 | Ptychotrygon triangularis Hamm and Cicimurri p. 120 fig. 6C |
| 2017 | Ptychotrygon triangularis Schubert et al. p. 18 figs. 7.9-7.16 |
| 2021 | Ptychotrygon triangularis Maisch et al. pp. 17, 18 figs. 9D-O |
| 2025 | Ptychotrygon triangularis Juranek and Shimada p. 14 fig. 6J |
| 2025 | Ptychotrygon triangularis Salvino et al. p. 122 fig. 3S |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
†Ptychotrygon triangularis Reuss 1845
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Diagnosis
No diagnoses are available