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A Temnothorax curvispinosus in Prince George's Co., Maryland (3/16/2016). Determined by James C. Trager/BugGuide.
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Barbara Thurlow.
Temnothorax curvispinosus in Washington Co., Maryland (5/15/2021). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).
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Jim Moore.
Temnothorax curvispinosus in Anne Arundel Co., Maryland (Date obscured). (c) Timothy Reichard, all rights reserved.
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Timothy Reichard.
Temnothorax curvispinosus in Montgomery Co. (6/6/2025). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC)
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Jim Moore.
Temnothorax curvispinosus in Washington Co., Maryland (5/15/2021). (c) Jim Moore (Maryland), some rights reserved (CC BY-NC).
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Jim Moore.
A Temnothorax curvispinosus in Baltimore Co., Maryland (3/17/2012). Determined by Alex Wild and Ron M. via BugGuide.
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Emily Stanley.
Temnothorax curvispinosus, the acorn ant, is a species of ant in the genus Temnothorax.[1] The species is common and widely distributed in eastern United States, where they tend to inhabit forested areas. The ground-dwelling ants build their nests in plant cavities, in the soil or under rocks.[2] It is sometimes called the acorn ant because it can live inside hollowed out acorns.[3][4]
Acorn ants are found in both rural and urban habitats. The acorn ant is temperature-sensitive, and urban environments tend to be hotter and change temperature more rapidly than rural ones. Urban populations of acorn ants can evolve improved heat tolerance and also increased plasticity in responding to temperature changes.[3][4]
^Mackay, W. P. (2000). "A review of the New World ants of the subgenus Myrafant, (genus Leptothorax) (Hymenoptera: Formicidae)". Sociobiology. 36: 265–444.