Welcome to the Treatise on Invertebrate Paleontology!
Please enter a genera name to retrieve more information.
Leiagnostus
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Uncertain
Formal Genus Name and Reference:
Leiagnostus JAEKEL, 1909, p. 401
Type Species:
L. erraticus, OD, holotype (JAEKEL, 1909, fig. 23), K258, HMB, Berlin
Images
(Click to enlarge in a new window)
Fig. 238,3a,b. *L. erraticus, upper Lower Ordovician (?Kundan, upper Areniglower Llanvirn), Germany (glacial erratic in Neukölln, Berlin); a, cephalon of enrolled holotype, HMB K258, ×17 (Neben & Kreuger, 1971, pl. 11, fig. 37–38); b, pygidium of same specimen, HMB K258, ×17 (Ahlberg, 1988, fig. 2c).
Synonyms
Phoidagnostoides
Geographic Distribution
Germany, Tremadoc–Arenig; Czech Republic, Tremadoc–Llanvirn; France, Wales, Tremadoc; Sweden, early Arenig; Argentina, Tremadoc (N. argentina Zone); China (Guizhou, ?Hunan, Gansu, Xinjiang), ?uppermost Cambrianlower Llanvirn; ? Kazakhstan, Rhadinopleura pyriforme Zone.
Age Range
Beginning Stage in Treatise Usage:
uppermost Cambrian
Beginning International Stage:
Cambrian Stage 10
Fraction Up In Beginning Stage:
0
Beginning Date:
491
Ending Stage in Treatise Usage:
uppermost Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Cephalon and pygidium ovoid, effaced, cephalon lacking border, totally effaced except for advanced glabellar node, pygidium nonspinose, with weak axial node and relatively broad, flat border with nondeliquiate border furrow.
References
Jaekel, O. 1909. Über die Agnostiden. Zeitschrift der Deutschen Geologischen Gesellschaft 61:380-401, 23 fig.
Museum or Author Information
Classification
Phylum:
Unknown
Class:
Trilobata
Order:
Agnostida
Superfamily:
Agnostoidea
Family:
Uncertain
Formal Genus Name and Reference:
Leiagnostus JAEKEL, 1909, p. 401
Type Species:
L. erraticus, OD, holotype (JAEKEL, 1909, fig. 23), K258, HMB, Berlin
Images
(Click to enlarge in a new window)
Fig. 238,3a,b. *L. erraticus, upper Lower Ordovician (?Kundan, upper Areniglower Llanvirn), Germany (glacial erratic in Neukölln, Berlin); a, cephalon of enrolled holotype, HMB K258, ×17 (Neben & Kreuger, 1971, pl. 11, fig. 37–38); b, pygidium of same specimen, HMB K258, ×17 (Ahlberg, 1988, fig. 2c).
Synonyms
Phoidagnostoides
Geographic Distribution
Germany, Tremadoc–Arenig; Czech Republic, Tremadoc–Llanvirn; France, Wales, Tremadoc; Sweden, early Arenig; Argentina, Tremadoc (N. argentina Zone); China (Guizhou, ?Hunan, Gansu, Xinjiang), ?uppermost Cambrianlower Llanvirn; ? Kazakhstan, Rhadinopleura pyriforme Zone.
Age Range
Beginning Stage in Treatise Usage:
uppermost Cambrian
Beginning International Stage:
Cambrian Stage 10
Fraction Up In Beginning Stage:
0
Beginning Date:
491
Ending Stage in Treatise Usage:
uppermost Cambrian
Ending International Stage:
Cambrian Stage 10
Fraction Up In Ending Stage:
0
Ending Date:
486.85
Description
Cephalon and pygidium ovoid, effaced, cephalon lacking border, totally effaced except for advanced glabellar node, pygidium nonspinose, with weak axial node and relatively broad, flat border with nondeliquiate border furrow.
References
Jaekel, O. 1909. Über die Agnostiden. Zeitschrift der Deutschen Geologischen Gesellschaft 61:380-401, 23 fig.