Here,we describe a new primitive Erinaceidae species,Oligoechinus lanzhouensis n.gen.n.sp.,based on a specimen from late Oligocene strata of the Lanzhou Basin,Gansu Province.Its characteristics are as follows:the M1 w...Here,we describe a new primitive Erinaceidae species,Oligoechinus lanzhouensis n.gen.n.sp.,based on a specimen from late Oligocene strata of the Lanzhou Basin,Gansu Province.Its characteristics are as follows:the M1 width is longer than the length,the metastyle extends far disto-labially,the posterior margin has strong curve and a distinct metaconule that is connected to the protocone by a postprotocrista is located in the centre of the tooth.The posterior arm of the metaconule is poorly developed.In the P4,the pterion of the metastyle is less developed and the metacone is carinate.In addition,O.lanzhouensis has a premolar larger than the canine tooth(P2>C)and P3 had no molarisation,characters also possessed by Erinaceus.Overall,O.lanzhouensis was similar to Mioechinus based on architectural tooth features,demonstrating a closed genetic relationship.Fossil Erinaceidae are relatively rare before the Miocene.The discovery of O.lanzhouensis provides an important insight into the origin of Mioechinus in China and the early evolution of the Erinaceidae.Our analysis shows that a relatively recent ancestor of Mioechinus had probably existed in the early Oligocene and that O.Lanzhouensis was likely an ancestral type of Mioechinus gobiensis,and its systematic position should be located at a transitional position between Amphechinus and Mioechinus.展开更多
In Zeng et al.(2024),we employed mitochondrial genome sequencing to investigate the evolutionary history and cryptic diversity within the Erinaceidae family.Our phylogenetic analyses revealed widespread cryptic divers...In Zeng et al.(2024),we employed mitochondrial genome sequencing to investigate the evolutionary history and cryptic diversity within the Erinaceidae family.Our phylogenetic analyses revealed widespread cryptic diversity,particularly within the genus Hylomys of the subfamily Galericinae.This study proposed that several Hylomys subspecies likely merit full species status and identified two potentially unrecognized subspecies:Hylomys suillus ssp.1 and H.suillus ssp.2(Figures 1-3 in Zeng et al.2024).展开更多
基金supported by the National Natural Science Foundation of China(No.41290253)
文摘Here,we describe a new primitive Erinaceidae species,Oligoechinus lanzhouensis n.gen.n.sp.,based on a specimen from late Oligocene strata of the Lanzhou Basin,Gansu Province.Its characteristics are as follows:the M1 width is longer than the length,the metastyle extends far disto-labially,the posterior margin has strong curve and a distinct metaconule that is connected to the protocone by a postprotocrista is located in the centre of the tooth.The posterior arm of the metaconule is poorly developed.In the P4,the pterion of the metastyle is less developed and the metacone is carinate.In addition,O.lanzhouensis has a premolar larger than the canine tooth(P2>C)and P3 had no molarisation,characters also possessed by Erinaceus.Overall,O.lanzhouensis was similar to Mioechinus based on architectural tooth features,demonstrating a closed genetic relationship.Fossil Erinaceidae are relatively rare before the Miocene.The discovery of O.lanzhouensis provides an important insight into the origin of Mioechinus in China and the early evolution of the Erinaceidae.Our analysis shows that a relatively recent ancestor of Mioechinus had probably existed in the early Oligocene and that O.Lanzhouensis was likely an ancestral type of Mioechinus gobiensis,and its systematic position should be located at a transitional position between Amphechinus and Mioechinus.
文摘In Zeng et al.(2024),we employed mitochondrial genome sequencing to investigate the evolutionary history and cryptic diversity within the Erinaceidae family.Our phylogenetic analyses revealed widespread cryptic diversity,particularly within the genus Hylomys of the subfamily Galericinae.This study proposed that several Hylomys subspecies likely merit full species status and identified two potentially unrecognized subspecies:Hylomys suillus ssp.1 and H.suillus ssp.2(Figures 1-3 in Zeng et al.2024).
