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Paradoxides
Classification
Phylum:
Arthropoda
Class:
Trilobita
Order:
Redlichiida
Superfamily:
Paradoxidoidea
Family:
Paradoxididae
Formal Genus Name and Reference:
Paradoxides Brongniart, 1822, p. 30, Paradoxides Brongniart, 1822, p. 30, Paradoxides BRONGNIART, 1822, p. 30
Type Species:
* Entomostracites paradoxissimus Wahlenberg, 1818, p. 34, SD Barrande, 1852, p. 361, lectotype (WESTERGARD, 1953, p. 34, pl. 8, fig. 2), Ar 46147, RM, Stockholm
Images
(Click to enlarge in a new window)
Fig. 304,1a. *P. paradoxissimus (WAHLENBERG), middle Middle Cambrian (P. paradoxissimus Stage), Sweden (Öltorp, Västergötland); lectotype, exoskeleton, RM Ar46147, ×1 (new).——Fig. 304,1b. P. gracilis, middle Middle Cambrian, Czech Republic (Jince); rostral-hypostomal plate, SM A.1561, ×1 (new).
Synonyms
Vinicella
Geographic Distribution
England, Wales, H. parvifrons?Pt. punctuosus Zones; Sweden, Norway, Denmark, P. paradoxissimus and P. forchhammeri Stages; Czech Republic, P. gracilis Zone; Canada (eastern Newfoundland), Pt. punctuosus Zone; ? USA (South Carolina), ? Russia (Novaya Zemlya).
Age Range
Beginning Stage in Treatise Usage:
middle Middle Cambrian
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
upper Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
50
Ending Date:
498.75
Description
Glabella with S2 transglabellar and shallow medially, S3 and S4 short (tr. ), often faint, anterior border narrow (sag.) medially, eye lobe short (S1 to S3), with moderately deep palpebral furrow, eye ridge may be present, strongly arcuate anterior section of facial suture cutting anterior margin almost in exsaggittal line with outer margin of eye lobe, posterior section of facial suture straight or sigmoidal, cutting posterior margin almost in exsagittal line with outer margin of eye lobe, large rostralhypostomal plate with strongly convex anterior margin, Thorax with 19 to 21 segments where known, segments directed slightly forwards abaxially, hindmost pair of pleural spines subparallel, ending far behind tip of pygidium, Pygidium small, subhexagonal, widest behind midlength, at posterior end of long facet directed strongly backward, lateral margin short, slightly convex, posterior margin convex, straight, or concave, axis subtriangular, pleural and postaxial regions confluent and uniformly convex. [Many specimens supposedly of Paradoxides are based on material too incomplete for confident generic deter- mination; for example, specimens from Colombia, South America (RUSHTON, 1963), and a record from Australia (WHITEHOUSE, 1939, p. 276) are here excluded.] ]
References
Brongniart, A. 1822. Les Trilobites. In A. Brongniart
Museum or Author Information
Classification
Phylum:
Arthropoda
Class:
Trilobita
Order:
Redlichiida
Superfamily:
Paradoxidoidea
Family:
Paradoxididae
Formal Genus Name and Reference:
Paradoxides Brongniart, 1822, p. 30, Paradoxides Brongniart, 1822, p. 30, Paradoxides BRONGNIART, 1822, p. 30
Type Species:
* Entomostracites paradoxissimus Wahlenberg, 1818, p. 34, SD Barrande, 1852, p. 361, lectotype (WESTERGARD, 1953, p. 34, pl. 8, fig. 2), Ar 46147, RM, Stockholm
Images
(Click to enlarge in a new window)
Fig. 304,1a. *P. paradoxissimus (WAHLENBERG), middle Middle Cambrian (P. paradoxissimus Stage), Sweden (Öltorp, Västergötland); lectotype, exoskeleton, RM Ar46147, ×1 (new).——Fig. 304,1b. P. gracilis, middle Middle Cambrian, Czech Republic (Jince); rostral-hypostomal plate, SM A.1561, ×1 (new).
Synonyms
Vinicella
Geographic Distribution
England, Wales, H. parvifrons?Pt. punctuosus Zones; Sweden, Norway, Denmark, P. paradoxissimus and P. forchhammeri Stages; Czech Republic, P. gracilis Zone; Canada (eastern Newfoundland), Pt. punctuosus Zone; ? USA (South Carolina), ? Russia (Novaya Zemlya).
Age Range
Beginning Stage in Treatise Usage:
middle Middle Cambrian
Beginning International Stage:
Drumian
Fraction Up In Beginning Stage:
0
Beginning Date:
504.5
Ending Stage in Treatise Usage:
upper Middle Cambrian
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
50
Ending Date:
498.75
Description
Glabella with S2 transglabellar and shallow medially, S3 and S4 short (tr. ), often faint, anterior border narrow (sag.) medially, eye lobe short (S1 to S3), with moderately deep palpebral furrow, eye ridge may be present, strongly arcuate anterior section of facial suture cutting anterior margin almost in exsaggittal line with outer margin of eye lobe, posterior section of facial suture straight or sigmoidal, cutting posterior margin almost in exsagittal line with outer margin of eye lobe, large rostralhypostomal plate with strongly convex anterior margin, Thorax with 19 to 21 segments where known, segments directed slightly forwards abaxially, hindmost pair of pleural spines subparallel, ending far behind tip of pygidium, Pygidium small, subhexagonal, widest behind midlength, at posterior end of long facet directed strongly backward, lateral margin short, slightly convex, posterior margin convex, straight, or concave, axis subtriangular, pleural and postaxial regions confluent and uniformly convex. [Many specimens supposedly of Paradoxides are based on material too incomplete for confident generic deter- mination; for example, specimens from Colombia, South America (RUSHTON, 1963), and a record from Australia (WHITEHOUSE, 1939, p. 276) are here excluded.] ]
References
Brongniart, A. 1822. Les Trilobites. In A. Brongniart