Center for Integrative Biodiversity Discovery, Museum für Naturkunde Leibniz Institute for Evolution and Biodiversity Science, Berlin, Germany.
Laboratoire Biologie des Organismes et Écosystèmes Aquatiques MNHN, CNRS 8067, SU, IRD 207, UCN, UA, Sorbonne Université, Paris, France.
Sci Rep. 2022 Oct 27;12(1):18114. doi: 10.1038/s41598-022-23125-9.
A new species of extinct freshwater shrimp was discovered in the Eocene deposit of the Messel Pit Konservat-Lagerstätte. This rare find is represented by only a few specimens, one of which showing exceptionally preserved soft tissues and other internal parts like the stomach with possibly gastric ossicles in place, branchiae, the ovary, and the left mandible, never described in a fossil shrimp. The new species Bechleja brevirostris n. sp. is characterized by a short rostrum bearing 6-8 dorsal spines and one ventral tooth, and long second pereiopods with strong chelae. One additional specimen shows a slightly different morphology and might belong to a different species. The systematic position of the species among the superfamily Palaemonoidea is discussed, as well as implications for the knowledge of the paleoenvironment of Lake Messel and the paleobiogeography of the Eocene.
在 Messel 坑化石保护区的始新世沉积物中发现了一种已灭绝的淡水虾的新物种。这个罕见的发现仅由少数几个标本代表，其中一个标本显示出异常保存的软组织和其他内部部分，如胃可能有胃骨，鳃，卵巢和左颚，在化石虾中从未描述过。新物种 Bechleja brevirostris n. sp. 的特征是短的额部有 6-8 个背刺和一个腹齿，以及长的第二对步足，有强壮的螯。另一个标本显示出略有不同的形态，可能属于不同的物种。该物种在 Palaemonoidea 超科中的系统位置进行了讨论，以及对 Messel 湖古环境和始新世古生物地理学的认识。
