Typosillis

A Robust genera from the “Annelids” group, mostly found in Muddy Sandy Gravel

Muddy Sandy Gravel

Robust

Annelids

Genera Characteristics Recorded Traits Possible Values
Size in cm
  • 1-10 cm
  • <1 cm
  • 1-10 cm
  • 11-20 cm
  • >20 cm
Genera Characteristics Recorded Traits Possible Values
Motility (Adult)
  • Short Range Mobility
  • Adult
  • Short Range Mobility
  • Sedentary

“Short Range Mobility”

Motility (Larval)
  • Long Term Planktonic
  • Long Term Planktonic
  • Short Term Planktonic
  • Brooded or Laid Eggs

“Long Term Planktonic”

Lifespan
  • 1-2 years
  • >10 years
  • 3-10 years
  • 1-2 years
  • <1 year
Maturity
  • <1 year
  • >4 years
  • 3-4 years
  • 1-2 years
  • <1 year
Fecundity
  • 100 - 1000 (Estimated)
  • 1000 - 10000 (Estimated)
  • 1 - 10
  • 10 - 100
  • 100 - 1000
  • 1000 - 10000
  • 10000 - 1 million
  • > 1 million

estimated

estimated

Image: Typosillis © MES

Vulnerability

Typosyllis is a small-medium sized free-living polychaete worm belonging to the Family Syllidae. The body length is 1-5cm & the worm lives under stones & amongst epigrowths where it preys on small invertebrates at the sediment-water interface. It has limited mobility & is vulnerable to dredging & deposition of sediment mobilised during the dredging process.
 

Recoverability

The life-span of Typosyllis is about 1yr & sexual maturity is achieved just before the end of the life-span. The sexes are separate & fertilisation is external after the reproductive part of the female moves up into the water column. The fertilised eggs then develop into planktotrophic larvae. The genus has a relatively high dispersal potential, & restoration of the biomass is achieved within 1yr. It may also have the capacity to reproduce asexually. This genus therefore has a high recoverability both in terms of recolonisation & growth.

 

References

  • Biology

    • Hayward & Ryland, 1995b
  • Taxonomy

    • Howson & Picton, 1997
  • Distribution

    • Hayward & Ryland, 1995b
  • Reproduction