Camponotus planatus

Roger, 1863

compact carpenter ant, short carpenter ant

Camponotus planatus is a Neotropical carpenter ant characterized by polygynous colony structure—one of only three Camponotus species known to maintain multiple queens per colony. The species exhibits a distinctive compact body form and has been documented as an spreading in Florida and Texas. display kin discrimination based on matrilineal relatedness, with division of labor organized along lineages within colonies. The species serves as a model for Batesian and Wassmanian mimicry by multiple species, and has been observed tending the endangered Miami blue caterpillar in Florida.

Camponotus (Myrmobrachys) planatus var. acaciae by the Smithsonian. Used under a CC0 license.

Pronunciation

How to pronounce Camponotus planatus: /kæm.poʊˈnoʊ.təs plæˈneɪ.təs/

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Distinguished from other Camponotus by its compact body proportions—lower and broader mesosoma than typical carpenter ants. The characteristic tucked- posture while separates it from . In Florida, where it has spread, it may be confused with native Camponotus species, but its smaller size and compact build are diagnostic. Mimics including Myrmecotypus fuliginosus, Sarindia linda, Barberiella, and Mantoida maya closely resemble C. planatus in size, coloration, and movement patterns.

Images

Appearance

Compact body form with relatively low and broad mesosoma compared to other Camponotus . walk with tucked under the body, a distinctive posture. Coloration typically dark, with velvety yellowish pilosity on the . Size ranges from 3–9 mm for individuals that serve as mimicry models. present in winged reproductives.

Habitat

Nests in dead wood, including decaying stumps, fallen wood, and hollow trees. In natural range, occupies Neotropical forests. In invaded areas of Florida and Texas, found in similar woody . Primary colonies require high moisture; satellite colonies may establish in damp structural wood of buildings.

Distribution

Native to Neotropical region from Mexico through Central America and South America. Documented in Yucatan, Mexico; British Honduras; and Argentina. Established and spreading in southeastern United States, specifically Florida and Texas. Records from San Andrés and coastal Colombia.

Seasonality

Active year-round in tropical and subtropical portions of range. In temperate invaded areas, activity peaks in spring through fall; may remain active indoors during warm winter days in infested structures.

Diet

with documented seasonal shifts. In Yucatan dry season, primarily forages on nectar from the CAM orchid Schomburgkia tibicinis. In wet season, shifts to other nectar sources and insect prey. Consumes honeydew from sap-sucking insects. Tends Miami blue caterpillars, receiving sugary secretions in exchange for protection.

Host Associations

Schomburgkia tibicinis - nectar sourcePrimary dry season food source in Yucatan
Cyclargus thomasi bethunebakeri - tended byOne of 17 tending endangered Miami blue caterpillars in Florida
Caenocholax fenyesi - parasitized byStrepsipteran documented in Mexico; status questioned

Life Cycle

Holometabolous development with , larva, pupa, and stages. Polygynous colony structure with multiple egg-laying queens. Colony includes production of winged sexuals (queens and males) for and mating. New colonies established by mated queens. Colony foundation may occur in dead wood with adequate moisture.

Behavior

exhibit kin discrimination based on matrilineal relatedness, leading to division of labor organized along lineages within colonies. Foraging includes tending sap-sucking insects for honeydew and aggressive defense of food resources. When disturbed, workers may assume alert posture with slung forward. Foraging trails established to productive food sources.

Ecological Role

Serves as important model for mimicry; four documented mimics in Mountain Pine Ridge Forest Reserve alone. Functions as of small arthropods and as mutualist with honeydew-producing insects and myrmecophilous larvae. Contributes to wood decomposition through nest excavation in dead wood. May compete with native species in invaded range.

Human Relevance

Structural pest in invaded range; satellite colonies can establish in damp wood of buildings, causing damage through gallery excavation. Unlike , does not consume wood but excavates it for nesting. Subject of conservation research as one of 17 tending the endangered Miami blue , with potential importance for butterfly reintroduction efforts in Florida. Spreading in southeastern United States.

Similar Taxa

Camponotus floridanusBoth carpenter ants tending Miami blue in Florida; C. floridanus larger, more robust, native to Florida rather than
Camponotus musSimilar compact body form and Neotropical distribution; C. mus has more pronounced velvety abdominal and different pronotal structure
Camponotus sericeiventrisBoth Neotropical carpenter ants used as mimicry models; C. sericeiventris larger with striking golden-silvery and acute pronotal spines

More Details

Mimicry model system

C. planatus serves as model for both Batesian (palatable mimic, unpalatable model) and Wassmanian (mimic lives with model) mimicry. Four documented mimics include spiders (Myrmecotypus fuliginosus, Sarindia linda), a mirid bug (Barberiella), and a (Mantoida maya). Mimics replicate locomotion patterns, abdominal pumping, and antennal movements.

Isotopic dietary study

Stable carbon isotope analysis in Yucatan demonstrated predictable seasonal dietary shift correlated with orchid , providing rare quantitative documentation of foraging plasticity.

Invasion dynamics

Documented spreading in Florida since at least 2002; establishment in Texas also reported. derived from Neotropical source, with human-mediated transport likely via commerce.