Lachlania dencyanna (Gila Mayfly) | Natural Heritage New Mexico

Kingdom: Animalia

Phylum: Arthropoda

Class: Insecta

Order: Ephemeroptera

Family: Oligoneuriidae

Genus: Lachlania

Species: dencyanna

Gila Mayfly - Lachlania dencyanna

388070

Species Extent (New Mexico)

Global Rank: G1

State Rank: S1

Rank Metadata
State Rank: S1	Rank Changed: 04/16/2025
Rank Reviewed: 03/03/2014
Reason: With no observations since 1969 despite several attempts to locate this species including in known former locations there is some major concern for this species. There are several threats to the species including erosion. livestock grazing, water use, recreation, climate change and drought that may be responsible for the species no longer being found in its historical localities. Furthermore, the species has a very small geographic range which allow threats to quickly effect either a large portion or the entire species range. Additionally, this species was recently petitioned for federal listing on the endagered species act and a 90 day petition found that the petitioned was warranted and advanced the species to canidacy. As a result, this species is currently assessed as S1 in New Mexico.

Ecological Factors
Specificity: Moderate. Generalist or community with some key requirements scarce.	Range Extent: <100 square km (less than about 40 square miles)
Occurences: 1 - 5	Population Size: Unknown
Area of Occupancy: The Gila Mayfly is historically known from two locations in the Gila National Forest however has not been located at either since 1969 despite monitoring in the area.	Threat Summary: N/A

State Status:

Federal Status:

USFS Status: R3 SCC

BLM Status:

SWAP Status:

NMRP Strategy Status:

Number of Subpopulations: 0

Number of Mapped Locations: 0

Number of Observations: 0

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