Twisted Ramshorn
Bathyomphalus contortus
This record describes Bathyomphalus contortus (species). Recorded family: Planorbidae. Recorded order: Hygrophila.
Identification and Appearance
Up to 6mm and 2mm thick with numerous tight whorls and an crescent-shaped aperture which partly wraps around the last whorl. It is noticeable concave on one side and more or less flat on the other. The shell has a rounded edge profile and has radial growth lines. Usually lives in still water such as lakes, ponds and ditches, preferring well vegetated habitats. It can be found in the backwaters of rivers. The species is generally tolerant of pollution and nutrient enrichment. No additional images available for this species.
Classification
- Kingdom
- Animalia
- Phylum
- Arthropoda
- Order
- Hygrophila
- Family
- Planorbidae
- Genus
- Bathyomphalus
Imported taxonomy record. Source availability varies; see the source references and editorial policy below.
Habitat and Range
Habitat
Usually lives in still water such as lakes, ponds and ditches, preferring well vegetated habitats. It can be found in the backwaters of rivers. The species is generally tolerant of pollution and nutrient enrichment.
Seasonal Activity
All year.
Additional species information
Recorded status
Common and widespread.
About Hygrophila: the wider group
Order-level background for Hygrophila, the group containing Bathyomphalus contortus. Species-specific details appear above.
Group overview
This is a smaller arthropod order with specialized ecological roles. Arthropods are the most diverse animal phylum, comprising over 80% of all known animal species with approximately 1.2 million described species globally.
Ecological role of the group
Members of this order contribute to broader arthropod ecosystem functions including decomposition, predation, and serving as food sources for vertebrates. Arthropod biodiversity is essential for ecosystem resilience.
Economic and practical significance of the group
While this order has limited direct economic impact, arthropods collectively provide ecosystem services worth trillions of dollars annually through pollination, decomposition, pest control, and nutrient cycling.
Recorded sources for this group: General entomology and arthropod research. Imported estimates may describe particular regions or reporting periods.
Photos of Twisted Ramshorn (6)
Frequently Asked Questions About Twisted Ramshorn
What is Twisted Ramshorn?
Twisted Ramshorn (Bathyomphalus contortus) is a species in the family Planorbidae, within the order Hygrophila.
Where is Twisted Ramshorn found?
Habitat: Usually lives in still water such as lakes, ponds and ditches, preferring well vegetated habitats. It can be found in the backwaters of rivers. The species is generally tolerant of pollution and nutrient enrichment.
When is Twisted Ramshorn active?
Twisted Ramshorn: seasonal activity - All year..