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Platylichas
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Lichida
Family:
Lichidae
Subfamily:
Hoplolichinanae
Formal Genus Name and Reference:
Platylichas GÜRICH, 1901
Type Species:
Lichas margaritifer NIESZKOWSKI, 1857
Images
(Click to enlarge in a new window)
Fig. 396, 1. *P. margaritifer (Nieszkowski), Porkuni Ls., Est., 1 a, b, cran., dorsal, lateral, x1.5, 1c, hypostoma, x2.25, 1d, pyg., x1.25 (468), Fig. 393, 7a. P. grayi (Fletcher), Wenlock Ls., Eng., ceph., x1.5 (486n), Fig. 393, 7b. P. halli (Foerste), Maysville Sh., N.Am., hypostoma, x2.4 (486n)
Synonyms
Metalichas, Autoloxolichas, Linguecephalichas
Geographic Distribution
M.Ord.-M.Sil., N.Eu.-N.Am.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Axial furrows joining longitudinal furrows at occipital furrow in stratigraphically lower species, becoming modified and joining longitudinal furrows well in front of occipital furrow in later species, or dying out posteriorly, Pygidium with 3 pairs of furrowed pleurae ending in free points
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Trilobitomorpha
Class:
Trilobita
Order:
Lichida
Family:
Lichidae
Subfamily:
Hoplolichinanae
Formal Genus Name and Reference:
Platylichas GÜRICH, 1901
Type Species:
Lichas margaritifer NIESZKOWSKI, 1857
Images
(Click to enlarge in a new window)
Fig. 396, 1. *P. margaritifer (Nieszkowski), Porkuni Ls., Est., 1 a, b, cran., dorsal, lateral, x1.5, 1c, hypostoma, x2.25, 1d, pyg., x1.25 (468), Fig. 393, 7a. P. grayi (Fletcher), Wenlock Ls., Eng., ceph., x1.5 (486n), Fig. 393, 7b. P. halli (Foerste), Maysville Sh., N.Am., hypostoma, x2.4 (486n)
Synonyms
Metalichas, Autoloxolichas, Linguecephalichas
Geographic Distribution
M.Ord.-M.Sil., N.Eu.-N.Am.
Age Range
Beginning Stage in Treatise Usage:
M.Ord.
Beginning International Stage:
Dapingian
Fraction Up In Beginning Stage:
0
Beginning Date:
471.26
Ending Stage in Treatise Usage:
M.Sil.
Ending International Stage:
Homerian
Fraction Up In Ending Stage:
100
Ending Date:
426.74
Description
Axial furrows joining longitudinal furrows at occipital furrow in stratigraphically lower species, becoming modified and joining longitudinal furrows well in front of occipital furrow in later species, or dying out posteriorly, Pygidium with 3 pairs of furrowed pleurae ending in free points