Trade name
Isotomurus retardatus
Historical label North America
Also written as: Isotomurus retardatis, Isotomurus retardatum
Sold as Isotomurus retardatus. The most likely species is Isotomurus cf. louisiana.
I bought this Open the key with this name selected. It starts from the species behind the name and asks what you can see.
What you probably have
These are the species the name may stand for. The order and the words show how sure we are.
- The Green Water stock was sold as Isotomurus retardatus until 2026, when it was moved to Isotomurus cf. louisiana.
- The seller says the old identification was hard to obtain and the new one also lacks total certainty.
If you sell or buy under this name
What would settle it
-
Is the Green Water culture the species *Isotomurus louisiana* or a close one?
Identification Needs a specialist
Why it matters. Colour pattern is a known problem for separating species of Isotomurus. The seller kept cf. on the name for that reason.
What would help. Slide-mounted adults checked against setae characters, with a COI barcode.
Sources
- 1
Major Springtail Hobby Identification Updates (2026)
Pavy R. 2026. Springtails US
Link works · Retailer
Cited at Isotomurus retardatus Green Water Springtail to Isotomurus cf. louisiana.
- 2
Springtail Identification and Common Name Resource
Pavy R. Springtails US
Link works · Retailer
Cited at hobby name list, Isotomurus cf. louisiana "Green Water Springtail".