Cambrothyra Temporal range: Lower Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	incertae sedis
Class:	†Coeloscleritophora
Genus:	†Cambrothyra
Species
C. ampulliformis Qian and Zhang, 1983
Synonyms
?Mirabichitina (nomen nudum) Yand, He, and Deng, 1983 ?Nanjiangochitina (nomen nudum) Yang, He, and Deng, 1983 ?Mirabifolliculus Yang and He, 1984 ?Nanjiangofolliculus Yang and He, 1984 Acatomus Duan, 1986 Clinopa Duan, 1986 Horridomus Duan, 1986. Hubeitesta Duan, 1986 Situlitesta Duan, 1986 Ovitesta Duan, 1986 Trymitesta Duan, 1986 Pollofructus Geng and Zhang, 1987 Globifructus Geng and Zhang, 1987 Parahorridomus Duan, Cao, and Zhang, 1993 Laxicavia Duan, Cao, and Zhang, 1993 Turbinella Duan, Cao, and Zhang, 1993 Cyphinites Duan, Cao, and Zhang, 1993 Tympanites Duan, Cao, and Zhang, 1993 Lapistamnia Duan, Cao, and Zhang, 1993

Cambrothyra (not to be confused with Cambrorhytium) is a Lower Cambrian coeloscleritophoran from China. The fossils are hollow cones with porous walls that had an originally fibrous aragonitic mineralogy. These conical sclerites were generally not connected to other sclerites; only occasionally are they paired or twinned.^[1] The genus comprises the sole species C. ampulliformis.^[1]