Correction: Cranial anatomy of the baurioid therocephalian Choerosaurus dejageri with comments on secondary palate convergence in therocephalians and cynodonts

The funder Humboldt-Universität zu Berlin, Open Access Publication Fund to Alessandro Gigliotti was erroneously omitted.

The Funding statement has been updated to read:

“The author(s) declared that financial support was received for this work and/or its publication. This work was supported by a grant from the Deutsche Forschungsgemeinschaft (FR 2457/8-1) to Jörg Föbisch and by one from Humboldt-Universität zu Berlin, Open Access Publication Fund to Alessandro Gigliotti.”

A correction has been made to better place the figures in the manuscript.

All figure citations in section 3 Results, subsection 3.1 General preservation have been deleted. This originally read: “SAM-PK-8797 is missing large parts of the snout tip, skull roof, subtemporal region, dorsal occiput, and most of the left mandibular ramus (Figures 1–3). Each premaxilla is anteriorly damaged and lacks the prenasal (intranarial) process, which would have extended dorsally to contact the nasals as is present in other synapsids. The left premaxilla is generally better preserved than the right, which is missing most of its anterolateral portion housing upper incisors 1-5. Except for a small anterior fragment on the left side (Figure 4), both septomaxillae are not preserved, the maxillae are moderately well preserved, although their full dorsal and posterior extents—including contacts with the lacrimal, prefrontal, nasal, and jugal—cannot be reconstructed due to missing elements on both sides (Figures 1-3, 5). The nasals are badly damaged, with only parts of the posterior region and fragments of the lateral portion on both sides preserved (Figures 2, 4, 6). The left zygomatic arch, the anterodorsal margins of the lacrimals and anteroventral margins of the right prefrontal, and most of the left prefrontal are not preserved. Also, the posterior portion of the frontals and nearly the entire parietal bones are missing, leaving little information on their mutual suture. The postorbitals are preserved on both sides but are disarticulated from the frontal (Figures 1, 2, 4). The palatal region of SAM-PK-8797 is in comparably better condition. The left side of the maxillo-vomerine bridge is slightly damaged, and this anterior portion of the vomer is obliquely cracked. The palatines are well preserved except for the posterolateral portion on the left side. Only a fragment of the left ectopterygoid is retained, and the quadrate process of the pterygoid is only visible on the right side (Figure 5). The occipital and temporal regions are severely damaged and compressed. Because the density contrast between bone and matrix is minimal, much of this region could not be visualized. The prootics can be visualized superficially, along with the exoccipitals, the orbitosphenoid, and the anterior portion of the fused parabasisphenoid, including the cultriform process of the parasphenoid (Figures 7, 8). No identifiable traces of the left squamosal, left quadrate, quadratojugals, basioccipital, opisthotics, tabulars, supraoccipital, and postparietal are present. In the lower jaw, the right dentary is generally well-preserved, whereas the left dentary is only preserved up to the level of the tenth postcanine. Both dentaries are broken at the level of the symphysis, with the left dentary having been rotated and shifted approximately 45° relative to the right. Among the postdentary bones, only the right splenial, angular, surangular, prearticular, and both coronoids are preserved, with the left coronoid having been displaced dorsally into the region of the nasal cavity. Thus, descriptions of the postdentary bones are primarily based on the right side (Figure 9).” The section now reads:

“SAM-PK-8797 is missing large parts of the snout tip, skull roof, subtemporal region, dorsal occiput, and most of the left mandibular ramus. Each premaxilla is anteriorly damaged and lacks the prenasal (intranarial) process, which would have extended dorsally to contact the nasals as is present in other synapsids. The left premaxilla is generally better preserved than the right, which is missing most of its anterolateral portion housing upper incisors 1-5. Except for a small anterior fragment on the left side, both septomaxillae are not preserved, the maxillae are moderately well preserved, although their full dorsal and posterior extents—including contacts with the lacrimal, prefrontal, nasal, and jugal—cannot be reconstructed due to missing elements on both sides. The nasals are badly damaged, with only parts of the posterior region and fragments of the lateral portion on both sides preserved. The left zygomatic arch, the anterodorsal margins of the lacrimals and anteroventral margins of the right prefrontal, and most of the left prefrontal are not preserved. Also, the posterior portion of the frontals and nearly the entire parietal bones are missing, leaving little information on their mutual suture. The postorbitals are preserved on both sides but are disarticulated from the frontal. The palatal region of SAM-PK-8797 is in comparably better condition. The left side of the maxillo-vomerine bridge is slightly damaged, and this anterior portion of the vomer is obliquely cracked. The palatines are well preserved except for the posterolateral portion on the left side. Only a fragment of the left ectopterygoid is retained, and the quadrate process of the pterygoid is only visible on the right side. The occipital and temporal regions are severely damaged and compressed. Because the density contrast between bone and matrix is minimal, much of this region could not be visualized. The prootics can be visualized superficially, along with the exoccipitals, the orbitosphenoid, and the anterior portion of the fused parabasisphenoid, including the cultriform process of the parasphenoid. No identifiable traces of the left squamosal, left quadrate, quadratojugals, basioccipital, opisthotics, tabulars, supraoccipital, and postparietal are present. In the lower jaw, the right dentary is generally well-preserved, whereas the left dentary is only preserved up to the level of the tenth postcanine. Both dentaries are broken at the level of the symphysis, with the left dentary having been rotated and shifted approximately 45° relative to the right. Among the postdentary bones, only the right splenial, angular, surangular, prearticular, and both coronoids are preserved, with the left coronoid having been displaced dorsally into the region of the nasal cavity. Thus, descriptions of the postdentary bones are primarily based on the right side.”

The citation for Figures 1, 2 has been inserted after the first sentence of subsection 3.2.1 Premaxilla: “The premaxilla forms the anterior limit of the snout and the anteromedial margin of the external naris (Figures 1, 2).”

The citation for Figures 4, 5 has been inserted after the third sentence of subsection 3.2.1 Premaxilla: “Internally, each premaxilla has a palatally extending vomerine process, which accommodates the anterior process of the vomer medially, almost up to the anterior limits of the paracanine fossa (Figures 4, 5).”

All figures have accordingly been moved from 3.1 General preservation to appear after their first citation in the text.

The original version of this article has been updated.

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