Fig 1.
Delorhynchus cifellii, OMNH 77675.
(A) Interpretive drawing and (B) photograph of skull and mandible in lateral view. (C) Interpretive drawing and (D) photograph of skull in dorsal view. The set of vertebra exposed on the dorsal side does not belong to this specimen. Abbreviations: an, angular; ar, articular; ch, ceratohyal; d, dentary; f, frontal; j, jugal; la, lacrimal; m, maxilla; n, nasal; pal, palatine; pf, postfrontal; pm, premaxilla; po, postorbital; prf, prefrontal; q, quadrate; qj, quadratojugal; so, supraorbital; sp, splenial; sq, squamosal; st, supratemporal. Scale bar equals 1cm.
Fig 2.
Strict consensus tree obtained from the 6 optimal trees produced by the phylogenetic analysis.
The analysis places the juvenile specimen with Delorhynchus, supporting its attribution to the genus. Character codings of the juvenile Delorhynchus specimen, OMNH 77675. The specimen was added to the MacDougall et al. [7] matrix.?? 100????? ?? 101?? 000 1??????? 11? 0111 1-?11 00100 10?0??? 011 0??1?????? ????? ????? ????? ????? ????? ????? ????? ???? 0???? 1? 00????? 0–1????????? ????? ????? ????? ????? ????? ????? ????? ? 1??0
Fig 3.
A proposed ontogenetic series featuring Delorhynchus cifellii exhibiting the progressive decrease in size and division of the lateral temporal fenestrae as a result of the change in jugal morphology.
This series includes the following specimens: (A) OMNH 77675, (B) OMNH 77676, (C) OMNH 77677, (D) OMNH 73362, and (E) OMNH 73515. Scale bar equals 3 mm.
Fig 4.
A comparison between the composite reconstructions of the youngest and most mature individuals in the growth series.
Using OMNH 776575, 776576, 77677,77678, 74722, 73362, and 73515.