Postsplenial

The postsplenial is a bone in the lower jaw of sarcopterygians. It lies between the splenial and angular bones as the second bone in the infradentary series, and is accordingly also known as the second infradentary. As with the splenial, it is a part of the dermatocranium.

The postsplenial is present in various basal tetrapods, but is lost in amniotes and nectrideans. In the generalized osteolepiform pattern of the lateral line system, the mandibular sensory canal runs along the infradentaries, including the postsplenial, and there is an additional vertical C-shaped pit line on the postsplenial.

References

↑ Porro, Laura B.; Rayfield, Emily J.; Clack, Jennifer A. (2015-08-21). "Computed tomography, anatomical description and three‐dimensional reconstruction of the lower jaw of Eusthenopteron foordi Whiteaves, 1881 from the Upper Devonian of Canada". Palaeontology. 58 (6). Zerina Johanson (ed.): 1031–1047. doi:10.1111/pala.12192. eISSN 1475-4983. ISSN 0031-0239.
↑ Bolt, John R.; Lombard, R. Eric (2006). "SIGOURNEA MULTIDENTATA, A NEW STEM TETRAPOD FROM THE UPPER MISSISSIPPIAN OF IOWA, USA". Journal of Paleontology. 80 (4): 717–725. doi:10.1666/0022-3360(2006)80[717:SMANST]2.0.CO;2. ISSN 0022-3360.
1 2 Ahlberg, Per Erik; Clack, Jennifer A. (1998). "Lower jaws, lower tetrapods–a review based on the Devonian genus Acanthostega". Earth and Environmental Science Transactions of The Royal Society of Edinburgh. 89 (1): 11–46. doi:10.1017/S0263593300002340. ISSN 0263-5933.

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[Porroetal2015-1] Porro, Laura B.; Rayfield, Emily J.; Clack, Jennifer A. (2015-08-21). "Computed tomography, anatomical description and three‐dimensional reconstruction of the lower jaw of Eusthenopteron foordi Whiteaves, 1881 from the Upper Devonian of Canada". Palaeontology. 58 (6). Zerina Johanson (ed.): 1031–1047. doi:10.1111/pala.12192. eISSN 1475-4983. ISSN 0031-0239.

[2] Bolt, John R.; Lombard, R. Eric (2006). "SIGOURNEA MULTIDENTATA, A NEW STEM TETRAPOD FROM THE UPPER MISSISSIPPIAN OF IOWA, USA". Journal of Paleontology. 80 (4): 717–725. doi:10.1666/0022-3360(2006)80[717:SMANST]2.0.CO;2. ISSN 0022-3360.

[AhlbergClack1998-3] 1 2 Ahlberg, Per Erik; Clack, Jennifer A. (1998). "Lower jaws, lower tetrapods–a review based on the Devonian genus Acanthostega". Earth and Environmental Science Transactions of The Royal Society of Edinburgh. 89 (1): 11–46. doi:10.1017/S0263593300002340. ISSN 0263-5933.