The New Mexico Rare Arthropod Resource

This species occurs in the gypsum sand dune ecosystem of the Chihuahuan Desert. The larval form and host plant of Euxoa lafontainei is unknown, but it has been collected as an adult from Saltbush (Atriplex spp.) (Metzler et al. 2009).

This moth is only known from the Tularosa Basin of Otero County in southern New Mexico, particularly within White Sands National Park (Metzler et al. 2009).

The majority of gypsum sand habitat in New Mexico is under management by the National Park Service and the US Department of Defense (DOD). This species occurs in White Sands National Park, which is the world’s largest white gypsum sand field and completely protected from resource extraction and development (Metzler et al. 2009). The neighboring dune area is managed by the DOD White Sands Missile Range, so the degree of disturbance affecting this moth’s habitat there is unknown. However, White Sands does not manage habitat for this species specifically. As this species is poorly understood, research on the distribution, population size and trend, habitat and life history, and the impact of threats is needed.

This species is endemic to the White Sands gypsum ecosystem. Insect species of the gypsum sands are relatively poorly characterized (Metzler et al. 2009). However, because of its small range, Euxoa lafontainei may be highly habitat-specific and adapted to feed on plants of the unique gypsum soils of White Sands (Metzler 2021).

The White Sands dune field is an ecosystem at risk of instability due to extensive groundwater extraction on the eastern edge of the Tularosa Basin. Hydrologic modeling has shown that increased groundwater pumping in response to increased temperatures and drought conditions will lead to water level decreases up to 1.5 meters. The dune field only exists as a permanent landscape feature because the gypsum sands are held in place at the base by water weight wicked up from the ground, so a decrease in water resources could result in increased sand motility, and therefore instability of the interdune habitats where herbivorous insects live (Bourret 2015).

Groundwater extraction is more heavily utilized in periods of drought and increased temperatures. The Southwestern U.S. saw its driest 22-year period from 2000 to 2021, since at least 800 CE (the time period used in previous climatic reconstructions) (Williams et al. 2022). Droughts are projected to become more prolonged, severe, and common in the region under future climate change scenarios (USGCRP 2018). In addition to increased groundwater use, drough may impact the species in other ways. Drought has been shown to advanced timing to adulthood has been observed in some butterfly species, which may lead to phenological mismatch with plant resources (Forister et al. 2018) and drought may adversely impact larval host plants and nectar sources (Pettorelli et al. 2007, Gottfried et al. 2012). In addition, endemic species are on average at three times higher risk of extinction from threat of climate change than other native species (Manes et al. 2021)

White Sands is also threatened by invasive species, in particular Saltcedar (Tamarix spp.), which creeps into the interdune areas where the water table is high and outcompetes native plants while increasing soil salinity (Hager 1998).

The population size and trend are not known for this species, as it was not described until 2009. Possibly due to lack of surveys, it has not been recorded regularly since time of description. However, according to the National Park Service (2023), it is reportedly abundant in the dunes in June.

• Forister, M.L., Fordyce, J.A., Nice, C.C., Thorne, J.H., Waetjen, D.P. and Shapiro, A.M.. 2018. Impacts of a millennium drought on butterfly faunal dynamics. Climate Change Responses 5: (9-Jan).
• National Park Service (NPS). 2023. White Sands Natinal Park: White Moth Species. National Park Service (NPS)2024. https://home.nps.gov/whsa/learn/nature/whitemothspecies.htm
• GBIF.org. 2024. GBIF Occurrence Download. 2024. https://doi.org/10.15468/dl.hd9sun
• Moth Photographers Group. 2024. 45533. http://mothphotographersgroup.msstate.edu
• Hager, S.B.. 1998. The thermoregulatory and reproductive behavior of the lesser earless lizard, Holbrookia maculata, at White Sands National Monument, New Mexico. New Mexico State University, Las Cruces, New Mexico .
• Bourret, S.M.. 2015. Stabilization of the White Sands gypsum dune field, New Mexico, by groundwater seepage: a hydrological modeling study.. New Mexico Institute of Mining and Technology, Socorro, New Mexico .
• Manes, S., Costello, M.J., Beckett, H., Debnath, A., Devenish-Nelson, E., Grey, K.-A., Jenkins, R., Khan, T.M., Kiessling, W., Krause, C., Maharaj, S.S., Midgley, G.F., Price, J., Talukdar, G. and Vale, M.M. . 2021. Endemism increases species’ climate change risk in areas of global biodiversity importance. Biological Conservation 257.
• Metzler, E.H.. 2021. The remarkable endemism of moths in White Sands National Park. News of the Lepidopterists’ Society 63: (156-162).
• Williams, A.P., Cook, B.I. and Smerdon, J.E. . 2022. Rapid intensification of the emerging southwestern North American megadrought in 2020–2021. Nature Climate Change 12: (232-234).
• Pettorelli, N., Pelletier, F., von Hardenberg, A., Festa-Bianchet, M. and Côté S.D. 2007. Early onset of vegetation growth vs rapid green-up: impacts on juvenile mountain ungulates. Ecology 88: (381-390).
• USGCRP. 2018. Impacts, Risks, and Adaptation in the United States: Fourth National Climate Assessment, Volume II. U.S. Global Change Research Program , Washington, DC, USA : (1515).
• Gottfried, M., Pauli, H., Futschik, A., et al. 2012. Continent-wide response of mountain vegetation to climate change. Nature Climate Change 2: (111-115).
• ITIS. 2024. Integrated Taxonomic Information System (ITIS). 2024. https://www.itis.gov/
• Metzler, E., Bustos, D. and Forbes, G.. 2009. The Lepidoptera of White Sands National Monument, Otero County, New Mexico, USA 1. Two new species of Noctuidae (Lepidoptera, Noctuinae, Agrotini). Zookeys 9: (47-62).