Unit 2 (1 ft. below top), upper shale member, Mahantango Fm., New Bloomfield, PA (Devonian of the United States)

Where: Pennsylvania (40.4° N, 77.2° W: paleocoordinates 39.1° S, 25.5° W)

• small collection-level geographic resolution

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

• group of beds-level stratigraphic resolution

Environment/lithology: marine; gray, green, argillaceous siltstone

• siltstone, argillaceous, medium greenish gray, in 1-18 inch beds

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

PaleoDB collection 9898: authorized by Arnold Miller, entered by Karen Layou on 30.01.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Relative abundance info: present (1 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
Crinoidea
  -
Crinoidea indet.
Crinoidea indet. Miller 1821 Sea lily
common (columnals)
Lingulata
 Lingulida - Lingulidae
Lingula ligea
Lingula ligea Hall 1867
present
Strophomenata
 Strophomenida - Chonetidae
Chonetes sp., Devonochonetes scitulus
Chonetes sp. Fischer de Waldheim 1830
common
Devonochonetes scitulus Hall 1857
abundant
Rhynchonellata
 Spiriferida - Mucrospiriferidae
Mucrospirifer mucronatus
Mucrospirifer mucronatus Conrad 1841
abundant
 Spiriferida - Adolfiidae
"Spirifer tullius" = Allanella tullius
"Spirifer tullius" = Allanella tullius Hall 1867
common
  - Tropidoleptidae
Tropidoleptus carinatus
Tropidoleptus carinatus Conrad 1839
abundant
Cephalopoda
 Pseudorthocerida - Spyroceratidae
Spyroceras ? nuntium
Spyroceras ? nuntium
present (D. inaequistriata var. immatura)
Bivalvia
 Nuculanida - Malletiidae
Palaeoneilo plana, Palaeoneilo constricta
Palaeoneilo plana clam
present [entered as Paleoneilo plana]
Palaeoneilo constricta Conrad 1842 clam
present [entered as Paleoneilo constricta]
 Mytilida - Mytilidae
Phthonia sectifrons
Phthonia sectifrons mussel
present
 Ostreida - Pterineidae
"Leiopteria sp." = Leptodesma (Leiopteria)
"Leiopteria sp." = Leptodesma (Leiopteria) Hall 1883 oyster
present
 Solenida - Orthonotidae
Orthonota undulata
Orthonota undulata Conrad 1841 clam
common
Trilobita
 Phacopida - Homalonotidae
Trimerus (Dipleura) dekayi
Trimerus (Dipleura) dekayi Green 1832 trilobite
present