Unit 9, Montebello Member, Mahantango Fm., Rockville, Perry Co., PA (Devonian of the United States)

Where: Perry County, Pennsylvania (40.3° N, 76.9° W: paleocoordinates 39.3° S, 25.3° W)

When: Montebello Member (Mahantango Formation), Givetian (387.7 - 382.7 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; gray sandstone and siltstone

• sandstone, fine grained, light olive gray in 2-3 ft. undulose beds; siltstone, medium dark gray, weathering olive gray

Collection methods: surface (in situ)

Primary reference: R. L. Ellison. 1965. Stratigraphy and Paleontology of the Mahantango Formation in south-central Pennsylvania. Pennsylvania Geological Survey Bulletin G48 1-298 [A. Miller/K. Layou]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 9661: authorized by Arnold Miller, entered by Karen Layou on 10.01.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Relative abundance information: present (one specimen collected), common (2-10 specimens collected), abundant (more than 10 specimens collected), very abundant (sample extremely rich in a given species)
Show authors, comments, and common names
Trilobita
 Phacopida - Homalonotidae
Trimerus dekayi
Trimerus dekayi trilobite
common
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
present
Stenolaemata
 Cryptostomata - Fenestellidae
Fenestella emaciata
 Cystoporida - Sulcoreteporidae
Sulcoretepora incisurata
Lophophorata
 Tentaculitida - Tentaculitidae
Tentaculites attenuatus
Rhynchonellata
 Spiriferida - Spinocyrtiidae
Mediospirifer ? audaculus
Mediospirifer ? audaculus Conrad 1842
abundant
 Spiriferida - Cyrtinopsidae
"Delthyris sculptilis" = Megakozlowskiella sculptilis
"Delthyris sculptilis" = Megakozlowskiella sculptilis Hall 1843
present
 Rhynchonellida - Camarotoechiidae
Camarotoechia prolifica
Camarotoechia prolifica Hall 1867
common
 Rhynchonellida - Trigonirhynchiidae
"Camarotoechia congregata" = Cupularostrum congregata
"Camarotoechia congregata" = Cupularostrum congregata Conrad 1841
abundant
  - Tropidoleptidae
Tropidoleptus carinatus
Tropidoleptus carinatus Conrad 1839
present
Strophomenata
 Strophomenida - Leptostrophiidae
Protoleptostrophia perplana
Protoleptostrophia perplana Conrad 1839
common
 Strophomenida - Chonetidae
Devonochonetes scitulus, Devonochonetes coronatus
Devonochonetes scitulus Hall 1857
abundant
Devonochonetes coronatus Hall 1857
abundant
 Orthotetida - Schuchertellidae
Schuchertella variabilis
Bivalvia
 Ostreida - Pterineidae
Leptodesma sp., Cornellites flabella, Actinopteria decussata
Leptodesma sp. Hall 1883 oyster
present
Cornellites flabella oyster
common
Actinopteria decussata oyster
common
 Nuculanida - Malletiidae
Palaeoneilo muta
Palaeoneilo muta clam
common [entered as Paleoneilo muta]
Anthozoa
 Favositida - Micheliniidae
Pleurodictyum styloporum
Pleurodictyum styloporum tabulate coral
common