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Canadaspis
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Malacostraca
Subclass:
Phyllocarida
Order:
Phyllocarida - Uncertain Order and Family
Formal Genus Name and Reference:
Canadaspis Novozhilov in ORLOV, 1960
Type Species:
*Hymenocaris perfecta WALCOTT, 1912, OD
Images
(Click to enlarge in a new window)
Fig. 149,4. *C. perfecta (WALCOTT), Burgess Sh., B.C.; 4a, dorsal view of carapace showing left ?antenna, eyes, and rostral plate, X 1.6 (Rolfe, n); 4b, right lar. view of holotype (reconstr.) showing intestinal filling, X 1.7 (Rolfe, n, after 384c).
Synonyms
Geographic Distribution
W.Can.
Age Range
Beginning Stage in Treatise Usage:
M.Cam.
Beginning International Stage:
Cambrian Stage 4
Fraction Up In Beginning Stage:
40
Beginning Date:
512.3
Ending Stage in Treatise Usage:
M.Cam.
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
50
Ending Date:
498.75
Description
Carapace with hinge line, valves subovate, each with large anteromedian adductor muscle scar; rostral plate small, eyes pedunculate; pleomeres of same length as thoracomeres, without pleopods; with posteroventral spines, especially well developed on ?pretelson somite and simulating furca; tdson small, rounded, ?without furca; ?amandibulate; thoracopods of at least 8, short segments wtih 4 distal, anteriorly curved claws and large proximally attached lamella. [Type of order Canadaspidida and family Canadaspididae NOVOZHILOV in ORLOV, 1960.]
References
Museum or Author Information
Classification
Phylum:
Arthropoda
Subphylum:
Crustacea (superclass)
Class:
Malacostraca
Subclass:
Phyllocarida
Order:
Phyllocarida - Uncertain Order and Family
Formal Genus Name and Reference:
Canadaspis Novozhilov in ORLOV, 1960
Type Species:
*Hymenocaris perfecta WALCOTT, 1912, OD
Images
(Click to enlarge in a new window)
Fig. 149,4. *C. perfecta (WALCOTT), Burgess Sh., B.C.; 4a, dorsal view of carapace showing left ?antenna, eyes, and rostral plate, X 1.6 (Rolfe, n); 4b, right lar. view of holotype (reconstr.) showing intestinal filling, X 1.7 (Rolfe, n, after 384c).
Synonyms
Geographic Distribution
W.Can.
Age Range
Beginning Stage in Treatise Usage:
M.Cam.
Beginning International Stage:
Cambrian Stage 4
Fraction Up In Beginning Stage:
40
Beginning Date:
512.3
Ending Stage in Treatise Usage:
M.Cam.
Ending International Stage:
Guzhangian
Fraction Up In Ending Stage:
50
Ending Date:
498.75
Description
Carapace with hinge line, valves subovate, each with large anteromedian adductor muscle scar; rostral plate small, eyes pedunculate; pleomeres of same length as thoracomeres, without pleopods; with posteroventral spines, especially well developed on ?pretelson somite and simulating furca; tdson small, rounded, ?without furca; ?amandibulate; thoracopods of at least 8, short segments wtih 4 distal, anteriorly curved claws and large proximally attached lamella. [Type of order Canadaspidida and family Canadaspididae NOVOZHILOV in ORLOV, 1960.]