摘要
The Early Cretaceous Jehol biota of northeastern China contains a diverse group of notostracans, including two genera, Chenops and Jeholops, described here. Chenops is characterized by a combination of an ovate carapace, narrow anal plate, equant distal endites and endopod on the anterior thoracic limbs. In addition to the new species, Chenops yixianensis, the genus also provisionally includes Prolepidurus oblongus Oleynikov, 1968. Jeholops, however, is monotypic, represented by the new species Jeholops hongi. It is characterized by a combination of kazacharthran and notostracan features unique to this taxon. Both new genera are provisionally placed in the taxon Notostraca. More detailed work exploring the morphology of exceptionally-preserved branchiopod crustaceans is needed. The difficulties in placing fossil notostracans into a phylogenetie framework are discussed.
The Early Cretaceous Jehol biota of northeastern China contains a diverse group of notostracans, including two genera, Chenops and Jeholops, described here. Chenops is characterized by a combination of an ovate carapace, narrow anal plate, equant distal endites and endopod on the anterior thoracic limbs. In addition to the new species, Chenops yixianensis, the genus also provisionally includes Prolepidurus oblongus Oleynikov, 1968. Jeholops, however, is monotypic, represented by the new species Jeholops hongi. It is characterized by a combination of kazacharthran and notostracan features unique to this taxon. Both new genera are provisionally placed in the taxon Notostraca. More detailed work exploring the morphology of exceptionally-preserved branchiopod crustaceans is needed. The difficulties in placing fossil notostracans into a phylogenetie framework are discussed.
基金
supported by the National Natural Science Foundation of China(no.40872022)
the Nature Science Foundation of Beijing(no.5082002)
Scientific Research Key Program and PHR Project of Beijing Municipal Commission of Education
funded by a Crustacean Society Denton Belk Fellowship and the Yale Peabody Museum
关键词
ARTHROPODA
CRUSTACEA
BRANCHIOPODA
Phyllopoda
Calmanostraca
NOTOSTRACA
Early
Cretaceous
Mesozoic
Yixian
Formation
Jehol
biota
inner
Mongolia
Hebei
China
Arthropoda, Crustacea, Branchiopoda, Phyllopoda, Calmanostraca, Notostraca, Early Cretaceous,Mesozoic, Yixian Formation, Jehol biota, inner Mongolia, Hebei, China
