Platythyrea

Roger, 1863

Species Guides

Platythyrea punctata(Common Silvery Hunter Ant)

Platythyrea is a of predatory ants in the Ponerinae and the sole member of the tribe Platythyreini. range from 4–20 mm in size. The genus exhibits remarkable reproductive diversity: most have gamergates (reproductive female workers), though P. conradti has ergatoid queens instead. Some species with gamergates also produce queens. The genus has a worldwide distribution in tropical and subtropical regions.

Platythyrea by (c) Wilderness Safaris Botswana - Conservation Team, some rights reserved (CC BY), uploaded by Wilderness Safaris Botswana - Conservation Team. Used under a CC-BY license.

Platythyrea by (c) Jonghyun Park, some rights reserved (CC BY), uploaded by Jonghyun Park. Used under a CC-BY license.

Pronunciation

How to pronounce Platythyrea: //ˌplætɪˈθaɪriə//

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Identification

Distinguished from other Ponerinae by its status as the sole member of tribe Platythyreini. can be recognized by their relatively large size range (4–20 mm) compared to many other ponerine . Reproductive strategy varies by and requires examination of colony composition: presence of gamergates versus ergatoid queens versus queens.

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Appearance

are small to very large in size, measuring 4–20 mm in body length. queens, when present, are similar in form to workers but possess wings.

Habitat

Tropical and subtropical regions worldwide. Specific microhabitat details are -dependent and not well documented for the as a whole.

Distribution

Worldwide distribution in tropical and subtropical regions. Documented occurrences include: Florida and Caribbean Islands (P. punctata), Puerto Rico, Rica, West Malaysian rainforest, and South Africa (P. lamellosa).

Life Cycle

Colony involves multiple strategies depending on : gamergates (mated reproductive ), ergatoid queens (wingless reproductive ants intermediate between workers and winged queens), or queens. In P. punctata, colonies are predominantly clonal with reproduction by , though occurs facultatively. Workers exhibit age-based : young workers remain in the nest with care duties, transitioning to foraging as they age. and muscle fibers thicken during the intranidal period, reaching final development in foragers.

Behavior

Predatory. display age-based division of labor: young workers perform intranidal tasks including care, while older workers transition to extranidal activities such as foraging. The timing of this transition varies among colonies; workers transitioning at younger ages show reduced longevity. Colonies of P. punctata are primarily with reduced activity. Policing and occur among workers. Larva-to- has been observed: larvae possess specialized structures enabling food transfer to adult workers. Colonies may adopt workers.

Similar Taxa

Other Ponerinae generaPlatythyrea is distinguished by its unique tribal placement (Platythyreini) and by the presence of gamergates in most , contrasting with the more typical -based in many other ponerine ants.

More Details

Reproductive biology

The exhibits exceptional reproductive flexibility. P. punctata is notable for automictic involving central fusion of meiotic products, which maintains heterozygosity and minimizes inbreeding depression. Crossover occurs at greatly reduced rates during in this . However, is facultatively sexual: males, inseminated queens, and inseminated (gamergates) occur sporadically. In Rican of P. punctata, uninseminated workers appear incapable of thelytoky, unlike Florida/Caribbean populations. P. tricuspidata and P. quadridenta in Malaysia exhibit by workers with many sterile mated workers present; P. quadridenta can produce queens in larger colonies.

Physiological development

In P. punctata, reproductive status influences resource allocation: reproductive individuals show variation in muscle fiber development compared to non-reproductives, apparently minimizing metabolic costs unrelated to -laying. This represents a trade-off between and somatic maintenance.