A collection of decapod fossils from the Miocene St. Marys Formation, Little Cove Point Member (Maryland, USA), yielded six species belonging to three genera of brachyuran crabs, NecronectesA. Milne-Edwards, 1881, CallinectesStimpson, 1860, and CancerLinnaeus, 1758. Cancer included four species, Cancer irroratusSay, 1817; C. borealisStimpson, 1859; and two new species, C. nancei and C. zahrae. Necronectes is represented by N. drydeniRathbun, 1935,. Callinectes was also represented by a single species, C. sapidusRathbun, 1896. Most of the fossils were small relative to normal adult size, suggesting that the environment served as a nursery to developing individuals. The paleoecology of Chesapeake Bay was similar to the present-day ecology based on study of recent faunas, lithology, and paleoecology. The paleoenvironment was a shallow embayment within the temperate climate zone.

中文翻译：

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来自美国马里兰州圣玛丽斯组的中新世Brachyuran螃蟹（十足目：Brachyura：Cancroidea，Portunidae）的系统学和古生态

来自Little Cove Point成员（美国马里兰州）的中新世圣马里斯组的十足动物化石的集合，产生了六个物种，属于短壳蟹的三个属，Necronectes A. Milne-Edwards，1881年，Callinectes Stimpson，1860年，Cancer Linnaeus，1758年。癌症包括4种，irroratus说，1817年。C.borealis Stimpson，1859年；以及两个新物种，C。nancei和C. zahrae。Necronectes以N. drydeni Rathbun（1935年）为代表。Callinectes也由单一物种C. sapidus代表拉特邦（Rathbun），1896年。相对于正常成年人而言，大多数化石很小，这表明环境可以作为发育中个体的苗圃。切萨皮克湾的古生态学与近代动物群，岩性和古生态学的研究基础相近。古环境是在温带气候区的浅层湾。