Genus

Sphenoecium Chapman et Thomas, 1936

List of species

1. Sphenoecium johanssoni (Bengtson et Urbanek, 1986)

2. Sphenoecium mesocambricus (Öpik, 1933) | Middle Cambrian (old nomenclature)

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Hemichordata
Class	Pterobranchia
Subclass	Graptolithina
Order	Rhabdopleuridae
Genus	Archaeolafoea
	Chaunograptus
	Chitinodendron
	Epigraptus
	Haplograptus
	Kystodendron
	Palaeotuba
	Rhabdopleura
	Rhabdopleurites
	Rhabdopleuroides
	Sokoloviina
	Sphenoecium
Species	discoidalis
	filicoides
	johanssoni
	mesocambricus
	obuti
	robustus
	tubularis
	wheelerensis
Genus	Stolonodendrum