Masrasector now links to Didymoconus berkeyi in the LRT
Recent housekeeping
has linked these two taxa: Masrasector and Didymoconus berkeyi (Fig 1) based on current scoring and available data – not only for these two taxa, but for all tested taxa in the Synapsid subset of the large reptile tree (LRT, 2332 taxa).
Because every taxon in each subset affects every other taxon.
Figure 1. Masrasector now nests with Didymoconus berkeyi. Note the premaxilla is so transverse, it is invisible in lateral view in these two taxa.
” data-medium-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/01/masrasector-nananubis-588-2.jpg?w=173″ data-large-file=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/01/masrasector-nananubis-588-2.jpg?w=584″ class=”size-full wp-image-91081″ src=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/01/masrasector-nananubis-588-2.jpg” alt=”Figure 1. Masrasector now nests with Didymoconus berkeyi. Note the premaxilla is so transverse, it is invisible in lateral view in these two taxa.” width=”584″ height=”1010″ srcset=”https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/01/masrasector-nananubis-588-2.jpg?w=584&h=1010 584w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/01/masrasector-nananubis-588-2.jpg?w=87&h=150 87w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/01/masrasector-nananubis-588-2.jpg?w=173&h=300 173w, https://pterosaurheresies.wordpress.com/wp-content/uploads/2025/01/masrasector-nananubis-588-2.jpg 588w” sizes=”(max-width: 584px) 100vw, 584px” />
Figure 1. Masrasector now nests with Didymoconus berkeyi. Note the premaxilla is so transverse, it is invisible in lateral view in these two taxa.
Masrasector nananubis
(Borths MR and Seiffert ER 2017; Miocene 30 mya) This skunk-sized predator had huge canine teeth and high jugals with a sagittal crest to anchor large skull muscles.
Didymoconus berkeyi
(Matthew WD and Granger W 1924. Gingerich 1981, Wang X et al 2001; IVPP V11983, Eocene 52mya) is a former enigma taxon here nesting with Masrasector. The zygomatic arches are wider posteriorly and the orbits are dorsally open in this phylogenetically miniaturized taxon.
References
Borths MR and Seiffert ER 2017. Craniodental and humeral morphology of a new species of Masrasector (Teratodontinae, Hyaenodonta, Placentalia) from the late Eocene of Egypt and locomotor diversity in hyaenodonts. PLoS ONE 12(4):e0173527:1-60. Gingerich PD 1981. Radiation of Early Cenozoic Didymoconidae (Condylarthra, Mesonychia) in Asia, with a New Genus from the Early Eocene of Western North America. Journal of Mammalogy 62(3):526-538.
Matthew WD and Granger W 1924. New Carnivora from the Tertiary of Mongolia. American Museum Novitates (104).
wiki/Didymoconus
wiki/Masrasector
Source: https://pterosaurheresies.wordpress.com/2025/01/17/masrasector-now-links-to-didymoconus-berkeyi-in-the-lrt/
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