| 释义 |
- Description
- Distribution
- History of the taxonomy
- Habitat and behavior
- Species
- References
- Further reading
{{Taxobox
| image = Chesapecten_Jeffersonius_Outside.jpg
| image_caption = Chesapecten jeffersonius (outside)
| image2 = Chesapecten_Jeffersonius_Inside.jpg
| image2_caption = Chesapecten jeffersonius (inside)
| fossil_range = {{Fossil range|20.4|0.7}} {{small|Early Miocene to Early Pleistocene}}
| regnum = Animalia
| phylum = Mollusca
| classis = Bivalvia
| ordo = Ostreoida
| familia = Pectinidae
| genus = †Chesapecten
| type species = Chesapecten nefrens
| type species authority = Ward & Blackwater, 1975
}}Chesapecten is an extinct genus of scallop known from marine strata from the early Miocene to the early Pleistocene of the Eastern United States.[1]DescriptionLike some other large scallops, the shells of Chesapecten are characterized by a pattern of wide ribs which radiate outward from the apex of the shell. A distinctive feature of Chesapecten is that the radial ribs on its shell are crossed by much smaller, rough, concentric ribs, which follow the contours of the edges of the shell (are "conmarginal"). The left valve of Chesapecten is more convex than the right valve. The adductor muscle scar is large and rounded. DistributionThe geographical distribution of Chesapecten is limited to the Atlantic coastal plain of North America,[ where it can be found as far south as Florida, and as far north as Delaware.[3] One species of Chesapecten, Chesapecten jeffersonius, is the state fossil of Virginia.[4]] History of the taxonomyChesapecten was the first genus of North American fossil to be described and illustrated; a drawing of C. jeffersonius appeared in English naturalist Martin Lister's Historiae Conchyliorum, Liber III in 1687. However, Lister did not give Chesapecten its name.[ Chesapecten was formally named in 1975 by the paleontologists Ward and Blackwater. In 1980, it was assigned to the family Pectinidae by Harold E. Vokes.[1] The name Chesapecten comes from the Chesapeake Bay, where eroding cliffs and outcrops along the beaches regularly expose specimens.]Habitat and behaviorChesapecten lived on the seabed in coastal waters ranging in depth from a few feet to 130 feet. When not moving, it is assumed to have rested its flatter right valve on the seafloor. It is very likely that Chesapecten could move suddenly to escape a predator by flapping its valves and using the resulting jet propulsion, in a manner similar to that of almost all living scallops.SpeciesSpecies in the genus Chesapecten include: - †C. crassus[9]
- †C. coccymelus[1]
- †C. jeffersonius[1]
- †C. madisonius[1]
- †C. marylandicus[14]
- †C. middlesexensis[9]
- †C. m. bayshorensis[13]
- †C. m. hunterae[13]
- †C. monicae[9]
- †C. nefrens[14]
- †C. patagonensis[1]
- †C. quinarius[13]
- †C. santamaria[1]
- †C. sayanus[1]
- †C. septenarius[9]
- †C. skiptonensis[1]
References1. ^1 2 3 4 5 6 7 8 9 {{cite web | url = http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=16548 | title = Information on Chesapecten from The Paleobiology Database | accessdate = 2010-09-29}}
2. ^1 {{Cite journal| bibcode = 2007AGUFMPP51E..05G | title = NASA ADS: Seasonal Variations Preserved in an Extinct Neogene Scallop, Chesapecten, from Florida to Delaware, USA and its Implications for Paleobiogeography | journal = American Geophysical Union | volume = 51 | author1 = Goewert | first1 = A. E. | last2 = Surge | first2 = D. | year = 2007 }}
3. ^1 {{cite web |url = http://web.wm.edu/geology/virginia/vafossils/index.php |title = The Geology of Virginia |accessdate = 2010-09-29 |archive-url = https://web.archive.org/web/20100508145144/http://web.wm.edu/geology/virginia/vafossils/index.php# |archive-date = 2010-05-08 |dead-url = yes |df = }}
4. ^1 2 {{cite web | url = http://www.mgs.md.gov/esic/publications/B20/pect.html | title = Bulletin 20: Miocene Fossils of Maryland | accessdate = 2010-09-29 | deadurl = yes | archiveurl = https://web.archive.org/web/20100826052124/http://www.mgs.md.gov/esic/publications/B20/pect.html | archivedate = 2010-08-26 | df = }}
5. ^1 2 3 4 {{cite web |url = http://zipcodezoo.com/Animals/C/Chesapecten_nefrens/ |title = Chesapecten Nefrens - zipcodezoo.com |accessdate = 2010-09-29 |archive-url = https://web.archive.org/web/20120820201137/http://zipcodezoo.com/Animals/C/Chesapecten_nefrens/# |archive-date = 2012-08-20 |dead-url = yes |df = }}
6. ^1 2 3 4 {{cite web | url = https://www.floridamuseum.ufl.edu/files/9815/3022/4121/vol56no1archival.pdf | title = Systematics and biostratigraphy of Chesapecten and Carolinapecten (Mollusca: Bivalvia: Pectinidae) in the upper Miocene and Pliocene “Lower Tamiami Formation” of southwestern Florida | accessdate = 2018-08-19}}
}}Further readingOnline photo gallery with several pictures of Chesapecten nefrens
[https://web.archive.org/web/20160303222714/http://data.gbif.org/species/16363896 Information about Chesapecten from the Global Biodiversity Information Facility]
[https://images.google.com/images?hl=en&q=Chesapecten Images of Chesapecten from Google Images] {{Taxonbar|from=Q5092898}} 5 : Pectinidae|Neogene bivalves|Miocene genus first appearances|Pleistocene genus extinctions|Prehistoric bivalves of North America |