Spengelidae
| Spengelidae | |
|---|---|
| Scientific classification | |
| Domain: | Eukaryota | 
| Kingdom: | Animalia | 
| Phylum: | Hemichordata | 
| Class: | Enteropneusta | 
| Order: | Enteropneusta | 
| Family: | Spengelidae | 
| Synonyms | |
| Spengeliidae | |
Spengelidae is a family of worms belonging to the class Enteropneusta, order unknown. The larvae of one of its species, Schizocardium californicum, are known for not expressing Hox genes.
Genera:
- Glandiceps Spengel, 1891
- Mazoglossus Bardack, 1997
- Schizocardium Spengel, 1893
- Spengelia Willey, 1898
- Willeyia Punnett, 1903