A Global Mission

The mission of the Ocean Census is to accelerate the discovery of ocean life to advance fundamental science, empower conservation, and fuel innovation for the future of our planet.

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Gallery

Phylum

OC-SP-0002972

McHaffies Point - Ph Is;31 - Nemertea;BQDAC0020;MRG939-07;Tetrastemma sp. SMSA070;SMSA070;SP02362;AN022593;NMVF323490;PID0257492

Species ID

OC-SP-0002972

Discovered

Phylum

Nemertea

Species ID

OC-SP-0002972

Provisional Species Name

Tetrastemma sp_SMSA070

Lowest Valid Taxon Name in WoRMS

Tetrastemma

Lowest Known Rank

Genus

Status

Discovered

Does the taxonomist(s) intend to work on this material further?

3. I/We are not sure yet. This is of course no problem, we will display your species info (if not embargoed) while you work out your species description plan.

Embargo

No

Kingdom

Animalia

Phylum

Nemertea

Class

Hoplonemertea

Order

Monostilifera

Family

Tetrastemmatidae

Genus

Tetrastemma

Date Identified

23/01/2026

Taxonomic Remarks

This species is easily recognized by its uniquely tapered and pointed posterior end, relatively narrow rod-shaped stylet basis, and by COI sequence data.

Received All Minimal Data for Discovery

08/04/2026

Description of Material

Body 3 – 5 mm long, 0.6 mm wide. Background colour cream. Cephalic lobe same width as neck, rounded to trapezoid, twice as long as it is wide, separated from body by an indistinct neck furrow. Short transverse cerebral organ furrows visible dorsally and ventrally. Two pairs of ocelli. Posterior tip tapered and pointed. Stylet basis rod shaped, slightly wider at its distal rounded end, S/B = 0.8. With two accessory stylet sacs and 1 – 4 stylets in each.

Ecology

This common species is usually but not always found on the seagrass Amphibolis antarctica in the intertidal zone.

Distribution

Harmer’s Haven to Apollo Bay, Victoria. Also reported from South Australia, Australia.

Scientific Name Authorship

Maslakova, Svetlana

McHaffies Point - Ph Is;31 - Nemertea;BQDAC0020;MRG939-07;Tetrastemma sp. SMSA070;SMSA070;SP02362;AN022593;NMVF323490;PID0257492

Join the census

The Ocean Census Alliance unites national and philanthropic marine institutes, museums, and universities, backed by governments, philanthropy, business and civil society partners.