Overview

Comprehensive Description

Description

Prostomium anteriorly pointed. Lateral horns absent. Caruncle present. Occipital antenna present, or absent. Nuchal organ short, at most one segment long. Eyes present. Palps simple, lacking basal sheath. Dorsal ridge connecting bases of branchiae on chaetiger 1 absent. Prominent dorsal collar on setiger 2 absent. Dorsal branchiae present, first present on chaetiger 2. Dorsal branchiae absent from many median and posterior chaetigers. Dorsal branchiae continuous. Dorsal branchiae free and separate from notopodial lamellae throughout, all simple. First branchiae without process at base on anterior face. Accessory branchiae arising from posterior part of notopodium absent. Ventral branchiae absent. Chaetiger 3 without filament at base of branchiae. Dorsal crests absent. Ventral crests absent. Chaetiger 1 notopodium present. Neuropodial lobe of chaetiger 2 rounded, approximately symmetrical. Neuropodial lobes of posterior chaetigers a single lobe. Interparapodial pouches absent. Chaetigers 2–4 similar, not strongly differentiated. Chaetiger 5 unmodified, similar to subsequent chaetigers. Posterior modified notochaetae absent. Notopodial hooded hooks present. Neurochaetae of chaetiger 1 simple capillaries similar to those of subsequent chaetigers. Neuropodial hooded hooks present. Neuropodial hooded hooks with accessory tooth or teeth above the main fang, 1 accessory tooth (bidentate) or 2 accessory teeth (tridentate). Shaft of neuropodial hooded hooks of constant thickness, lacking a constriction. Neuropodial sabre chaetae absent. Neuropodial spines absent. Embedded bunches of notopodial needle chaetae absent.

Description generated from: Wilson, RS & McDiarmid, H 2013. Spionidae (Polychaeta)- A DELTA database of genera, and Australian species. Version 2; originally published as In RS Wilson, PA Hutchings & CJ Glasby (eds) Polychaetes: An Interactive Identification Guide. CSIRO Publishing, Melbourne.

Additional references:
Blake, JA and Kudenov, JD. 1978. The Spionidae (Polychaeta) from southeastern Australia and adjacent areas with a revision of the genera. Memoirs of the National Museum of Victoria 39, 171-280.

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© Wilson, Robin

Source: Annelida LifeDesk

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Distribution

Distribution within Australia: South-eastern Australia.

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© Wilson, Robin

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Physical Description

Diagnostic Description

"Prostomium conical, narrow, and tapered anteriorly; occipital tentacle and eyes present or absent. Peristomium fused to postomium without lateral wings. Branchiae beginning on chaetiger 2, present in the anterior region of the body, branchiae all cirriform, not fused to the dorsal lamellae. Chaetae of two types: limbate capillaries anteriorly, and bidentate, tridentate or tetradentate hooded hooks arranged in the notopodia and neuropodia of the median and posterior region. Pygidium with 2-12 acuminate anal cirri." (R. Sarda, G. San Martin, E. Lopez, D. Martin, 2006).

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© Archer, Cameron

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Ecology

Habitat

Insufficient data.

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© Wilson, Robin

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Depth range based on 1456 specimens in 6 taxa.
Water temperature and chemistry ranges based on 1055 samples.

Environmental ranges
  Depth range (m): 0 - 1180
  Temperature range (°C): -0.862 - 27.668
  Nitrate (umol/L): 0.009 - 24.417
  Salinity (PPS): 33.398 - 38.824
  Oxygen (ml/l): 2.900 - 6.915
  Phosphate (umol/l): 0.038 - 1.864
  Silicate (umol/l): 0.805 - 26.949

Graphical representation

Depth range (m): 0 - 1180

Temperature range (°C): -0.862 - 27.668

Nitrate (umol/L): 0.009 - 24.417

Salinity (PPS): 33.398 - 38.824

Oxygen (ml/l): 2.900 - 6.915

Phosphate (umol/l): 0.038 - 1.864

Silicate (umol/l): 0.805 - 26.949
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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