Jehol fossils by Chang, Chen, Wang

By Chang, Chen, Wang

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Assemblage Abrestheria, Ambonella, andJibeilimnadia. estot'ia-Keratestheria a semblage: Be ides ir namesake forms, the Generally, they have a large carapace with several brawny growth lines assemblage Abresthel'ia, and Jibeilimnaclia. sometimes bearingincludes spines or mtesthet'ia, nodes. Growth bands areAmbomlla, broad and flatted with Generally, they have a large carapace withfound several growth line big reticulate sculpture (Fig. 41). These fossils were frombrawny the Dabeigou ~40 Eocyzicusmongolianus, a recent conchostracan sometimes bearingHebei spinesProvince, or nodes.

Yan-bin Shen superfamilies Astacoidea and Parastacoidea. The astacoids live in the Northern highly sporadic fossil record of freshwater shrimps is •Tl • h e i m p r o v e d by the discovery of a b u n d a n t specimens of Hemisphere. They are divided into the family Astacidae (Europe, western superfamiJies Ascacoidea and Parascacoidea. The asca oid live in che orchern poradic fo sil record of fresh\ ater shrimps North is America) and the family Cambaridae (North America and East Asia).

Very welJ developed, . 70 Reconstruction of Liaoningogrip/ws quadripartitlls in dorsal (a) and lateral (b) are biramous and the antennae uniramous. Thoracopods 2---8 are well developed elongate, biramous pleopocls are equally present on the pleomeres 1- 5. The distal aspects. (Courtesy: F. R. Schram/ ZMUA) with endopods. The last six thoracomeres are freely exposed. Very well developed, proropod margin is sigmoidally curved, with two-segmented exopods and anm 70 Reconstruction ofLiaoningogriphus quadripartitus in dorsal (a) and lateral (b) elongate, biramous pleopods are equally present on the pleomeres 1---5.

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