Odontomachus relictus

Deyrup & Cover, 2004

Florida Scrub Trap-jaw Ant

Odontomachus relictus is a of trap-jaw to Florida, where it inhabits endangered scrub on ancient sand ridges. It was described by Deyrup & Cover in 2004. Research suggests that on separate sand ridges may represent distinct species, which would make them among the rarest ants in North America. The species possesses the characteristic spring-loaded of the Odontomachus.

Odontomachus relictus by (c)
April Nobile, some rights reserved (CC BY). Used under a CC-BY license.

Pronunciation

How to pronounce Odontomachus relictus: /oʊˌdɒntoʊˈmɑːkəs rɪˈlɪktəs/

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Identification

Odontomachus relictus can be distinguished from other southeastern U.S. trap-jaw ants by its restricted distribution in central Florida's scrub . Unlike the spreading Odontomachus haematodus and O. ruginodis, O. relictus is confined to ancient sand ridges. Genetic and behavioral differences have been observed between on separate ridges, suggesting potential cryptic speciation. Queens use unique dialkyltetrahydrofuran compounds as chemical signals to distinguish themselves from , a profile distinct from the related O. ruginodis and O. haematodus.

Images

Habitat

Endangered scrub on ancient sand ridges in central Florida. The shows strong site fidelity to these specific geological formations.

Distribution

to Florida, United States. Restricted to ancient sand ridges in central Florida. Not known to be spreading or expanding its range.

Behavior

on separate sand ridges display distinct , indicating potential reproductive isolation. Like other Odontomachus , individuals possess spring-loaded capable of rapid closure. The species has been observed to exhibit the characteristic trap-jaw defensive behaviors, though specific behavioral details for O. relictus are limited.

Similar Taxa

Odontomachus ruginodisAlso found in Florida but has expanded its range northward to Gainesville and is associated with landscaped areas near buildings, unlike the restricted scrub of O. relictus.
Odontomachus haematodusLarger and more aggressive than O. relictus; has spread across the Gulf Coast from Alabama to Florida, showing expansion rather than restricted distribution.

More Details

Conservation Concern

If on separate sand ridges are confirmed as distinct , O. relictus would represent one of the rarest in North America due to its extremely limited distribution in endangered .

Chemical Communication Research

A 2015 study by Adrian Smith et al. found that O. relictus queens use a unique blend of dialkyltetrahydrofuran compounds to signal , chemically distinct from both O. ruginodis and O. haematodus. Two of these compounds were previously unknown to science.