Species

Holmograptus callotheca (Bulman, 1936)

Synonymy list
1932     Didymograptus callotheca — Bulman , pp. 16
Classification
Organism groupBiota
KingdomAnimalia
PhylumHemichordata
ClassPterobranchia
SubclassGraptolithina
SuborderSinograptina
OrderSinograptidae
GenusHolmograptus
Speciescallotheca
lentus
spinosus