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Harpidium
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Pentamerida
Suborder:
Pentameridina
Superfamily:
Pentameroidea
Family:
Pentameridae
Formal Genus Name and Reference:
Harpidium KIRK, 1925, p. 1
Type Species:
H. insignis, OD
Images
(Click to enlarge in a new window)
Fig. 656, 1a–f. *H. (H.) insignis, Heceta Limestone, Prince of Wales Island, Alaska, USA; side view of interior, ventral, lateral, lateral, posterior, anterior views, ×1 (Kirk, 1925).
Synonyms
Geographic Distribution
North America, Europe, Asia
Age Range
Beginning Stage in Treatise Usage:
Silurian (middle Aeronian)
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
33
Beginning Date:
439.86
Ending Stage in Treatise Usage:
Silurian (Ludlow)
Ending International Stage:
Ludfordian
Fraction Up In Ending Stage:
100
Ending Date:
422.73
Description
Smooth, nontrilobate, strongly ventribiconvex, dorsal interior as in Pentamerus
References
Museum or Author Information
Classification
Phylum:
Brachiopoda
Subphylum:
Rhynchonelliformea
Class:
Rhynchonellata
Order:
Pentamerida
Suborder:
Pentameridina
Superfamily:
Pentameroidea
Family:
Pentameridae
Formal Genus Name and Reference:
Harpidium KIRK, 1925, p. 1
Type Species:
H. insignis, OD
Images
(Click to enlarge in a new window)
Fig. 656, 1a–f. *H. (H.) insignis, Heceta Limestone, Prince of Wales Island, Alaska, USA; side view of interior, ventral, lateral, lateral, posterior, anterior views, ×1 (Kirk, 1925).
Synonyms
Geographic Distribution
North America, Europe, Asia
Age Range
Beginning Stage in Treatise Usage:
Silurian (middle Aeronian)
Beginning International Stage:
Aeronian
Fraction Up In Beginning Stage:
33
Beginning Date:
439.86
Ending Stage in Treatise Usage:
Silurian (Ludlow)
Ending International Stage:
Ludfordian
Fraction Up In Ending Stage:
100
Ending Date:
422.73
Description
Smooth, nontrilobate, strongly ventribiconvex, dorsal interior as in Pentamerus