Unit 1 (30 ft. below top), upper shale member, Mahantango Fm., New Bloomfield, P (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 claystone

• claystone, micaceous, light to medium olive gray, chippy

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 9893: 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)
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
very abundant
Ostracoda
 Palaeocopida - Bolliidae
Ulrichia spinifera Coryell and Malkin 1936 ostracod
present
Trilobita
 Phacopida - Acastidae
Greenops boothi Green 1837 trilobite
present
 Phacopida - Phacopidae
"Phacops rana" = Eldredgeops rana
"Phacops rana" = Eldredgeops rana Green 1832 trilobite
common
Gastropoda
 Murchisoniina - Gosseletinidae
"Bembexia sulcomarginata" = Calvibembexia sulcomarginata
"Bembexia sulcomarginata" = Calvibembexia sulcomarginata Conrad 1842 snail
present
Bivalvia
 Modiomorphida - Cypricardiniidae
Cypricardinia indenta Conrad 1842 clam
present
 Modiomorphida - Modiomorphidae
Modiomorpha concentrica, "Goniophora hamiltonensis" = Goniomorpha hamiltonensis
Modiomorpha concentrica Conrad 1838 clam
common
"Goniophora hamiltonensis" = Goniomorpha hamiltonensis Hall and Whitfield 1869 clam
present
Craniata
 Craniopsida - Craniopsidae
Craniops hamiltoniae Hall 1867
present
Strophomenata
 Strophomenida - Douvillinidae
 Strophomenida - Leptostrophiidae
Protoleptostrophia perplana Conrad 1839
present
 Orthotetida - Schuchertellidae
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
"Camarotoechia congregata" = Cupularostrum congregata
"Camarotoechia congregata" = Cupularostrum congregata Conrad 1841
present
 Orthida - Rhipidomellidae
Rhipidomella vanuxemi Hall 1857
common
 Spiriferida - Elythidae
 Spiriferida - Spinocyrtiidae
Mediospirifer audaculus Conrad 1842
present
Stenolaemata
 Cystoporida - Sulcoreteporidae
Taeniopora exigua Nicholson 1887
present
 Cystoporata -
Fistuliporoidea indet. Astrova 1964
present
 Cryptostomata - Acanthocladiidae
Polypora sp.
present
 Cryptostomata - Fenestellidae