Tomopteris (Johnstonella) helgolandica (Greeff 1879)

ecomorphological guild

• World Register of Marine Species: www.marinespecies.org

egg diameter

• Marshall et al: 315 µm
• Marshall et al: 315 µm

geographic distribution

• United States Species List: United States
• World Register of Marine Species: Swedish Exclusive Economic Zone
• World Register of Marine Species: Gulf of Maine
• World Register of Marine Species: Belgian Exclusive Economic Zone
• World Register of Marine Species: Gulf of St. Lawrence

habitat

• World Register of Marine Species: marine benthic

latitude

• OBIS environmental data records: 78.2 degrees (max)
• OBIS environmental data records: -58.997 degrees (min)

longitude

• OBIS environmental data records: 44.87 degrees (max)
• OBIS environmental data records: -70.68 degrees (min)

size

• World Register of Marine Species: 17 mm
• World Register of Marine Species: 12 mm

water depth

• OBIS environmental data records: 282 m (max)
• OBIS environmental data records: 0 m (min)

water dissolved o2 concentration

• OBIS environmental data records: 6.095 mL/L (min)
• OBIS environmental data records: 7.539 mL/L (max)

water nitrate concentration

• OBIS environmental data records: 10.993 µmol/l (max)
• OBIS environmental data records: 3.124 µmol/l (min)

water o2 saturation

• OBIS environmental data records: 95.818 percent (max)
• OBIS environmental data records: 89.009 percent (min)

water phosphate concentration

• OBIS environmental data records: 0.775 µmol/l (max)
• OBIS environmental data records: 0.453 µmol/l (min)

water salinity

• OBIS environmental data records: 34.029 psu (min)
• OBIS environmental data records: 35.068 psu (max)

water silicate concentration

• OBIS environmental data records: 7.387 µmol/l (max)
• OBIS environmental data records: 3.009 µmol/l (min)

water temperature

• OBIS environmental data records: -0.687 degrees celsius (min)
• OBIS environmental data records: 9.505 degrees celsius (max)