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Amblypygus
Classification
Phylum:
Echinodermata
Subphylum:
Echinozoa (sea urchins, holothurians, etc.)
Class:
Echinoidea
Subclass:
Euechinoidea (sea urchins) - Superorder Neognathostomata (sand dollars)
Order:
Holectypoida
Suborder:
Neognathostomata - Suborder and Family uncertain
Formal Genus Name and Reference:
Amblypygus L. AGASSIZ, 1840, p. 5, 17
Type Species:
*A. dilatatus Agassiz & Desor, 1847, p. 167, SD Duncan & SLADEN, 1883, p. 15
Images
(Click to enlarge in a new window)
Fig. 334,7. *A. dilatatus (AGASSIZ & DESOR), Eoc., Fr.; Za-c, aboral, oral, proble views, XI (27e)
Synonyms
Semiclypeus
Geographic Distribution
Circummedit.-Madag.-India-W.Indies- USA (Fla.-Calif.)
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Oligo.
Ending International Stage:
Chattian
Fraction Up In Ending Stage:
100
Ending Date:
23.04
Description
Circular to ovate, low-arched to high subconical, flattened orally, margin tumid, ambulacra petaloid, pores conjugate, outer pore elongate, pores small adorally; apical system apparently tetrabasal; peristome sunken, subrounded to oblique; periproct large, pyriform, inframarginal; tubercles perforate, crenulate; no evidence of girdle or lantern in adult.
References
Museum or Author Information
Classification
Phylum:
Echinodermata
Subphylum:
Echinozoa (sea urchins, holothurians, etc.)
Class:
Echinoidea
Subclass:
Euechinoidea (sea urchins) - Superorder Neognathostomata (sand dollars)
Order:
Holectypoida
Suborder:
Neognathostomata - Suborder and Family uncertain
Formal Genus Name and Reference:
Amblypygus L. AGASSIZ, 1840, p. 5, 17
Type Species:
*A. dilatatus Agassiz & Desor, 1847, p. 167, SD Duncan & SLADEN, 1883, p. 15
Images
(Click to enlarge in a new window)
Fig. 334,7. *A. dilatatus (AGASSIZ & DESOR), Eoc., Fr.; Za-c, aboral, oral, proble views, XI (27e)
Synonyms
Semiclypeus
Geographic Distribution
Circummedit.-Madag.-India-W.Indies- USA (Fla.-Calif.)
Age Range
Beginning Stage in Treatise Usage:
Eoc.
Beginning International Stage:
Ypresian
Fraction Up In Beginning Stage:
0
Beginning Date:
56
Ending Stage in Treatise Usage:
Oligo.
Ending International Stage:
Chattian
Fraction Up In Ending Stage:
100
Ending Date:
23.04
Description
Circular to ovate, low-arched to high subconical, flattened orally, margin tumid, ambulacra petaloid, pores conjugate, outer pore elongate, pores small adorally; apical system apparently tetrabasal; peristome sunken, subrounded to oblique; periproct large, pyriform, inframarginal; tubercles perforate, crenulate; no evidence of girdle or lantern in adult.