Bulbaspis

Bulbaspis; Temporal range: Late Ordovician PreꞒ Ꞓ O S D C P T J K Pg N
	B. mirabilis
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Asaphida
Family:	†Raphiophoridae
Genus:	†Bulbaspis; Chugaeva, 1956
Type species
	Ampyx bulbifer; Weber, 1932
Species groups
	See text

Bulbaspis ("bulb shield") is a late Ordovician genus of asaphid trilobites of the family Raphiophoridae found primarily in upper Ordovician-aged deepwater marine strata of Kazakhstan, China, and possibly Tasmania. Species of Bulbaspis are similar to other raphiophorids such as Ampyx and , save that the long spine that emanates from the glabella of the latter two genera has been modified into a knob-like or bulb-like structure in Bulbaspis that developed incrementally in the animal's growth.^[1] The function of the bulb is as yet unknown: one hypothesis suggests sexual selection may have had a role in its evolution in the genus.^[2]

Individuals of B. brevis, demonstrating development of the bulb

Species[]

ovulum group
- B. lageniformis Zhou et al. 1982
- B. ovulum Weber 1948
- B. ordosensis Lu et al. 1976
bulbifer group
- B. brevis Zhou & Zhou, 2006
- B. bulbifer (Weber, 1932)
- B. korlaensis Zhang, 1981
- B. mirabilis Chugaeva, 1958
- B. sphaerornatus Chugaeva, 1958

References[]

^ ^a ^b Zhiqiang, Zhou, and Zhou Zhiyi. "Late Ordovician trilobites from the Zhusilenghaierhan area, Ejin Banner, western Inner Mongolia, China."MEMOIR-ASSOCIATION OF AUSTRALASIAN PALAEONTOLOGISTS 32 (2006): 383. "Archived copy" (PDF). Archived from the original (PDF) on 2016-05-13. Retrieved 2016-01-12.{{cite web}}: CS1 maint: archived copy as title (link)
^ Knell, Robert J., and Richard A. Fortey. "Trilobite spines and beetle horns: sexual selection in the Palaeozoic?." Biology letters 1.2 (2005): 196-199. [1]

This Asaphida-related article is a stub. You can help Wikipedia by .

This article related to an Ordovician animal is a stub. You can help Wikipedia by .

This article related to a Silurian animal is a stub. You can help Wikipedia by .

[zzzz-1] Zhiqiang, Zhou, and Zhou Zhiyi. "Late Ordovician trilobites from the Zhusilenghaierhan area, Ejin Banner, western Inner Mongolia, China."MEMOIR-ASSOCIATION OF AUSTRALASIAN PALAEONTOLOGISTS 32 (2006): 383. "Archived copy" (PDF). Archived from the original (PDF) on 2016-05-13. Retrieved 2016-01-12.{{cite web}}: CS1 maint: archived copy as title (link)

[knell-2] Knell, Robert J., and Richard A. Fortey. "Trilobite spines and beetle horns: sexual selection in the Palaeozoic?." Biology letters 1.2 (2005): 196-199. [1]

[1]

[2]

Bulbaspis Temporal range: Late Ordovician PreꞒ Ꞓ O S D C P T J K Pg N

B. mirabilis
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	†Trilobita
Order:	†Asaphida
Family:	†Raphiophoridae
Genus:	†Bulbaspis Chugaeva, 1956
Type species
Ampyx bulbifer Weber, 1932
Species groups^[1]
See text

Bulbaspis

Species[]

See also[]

References[]