Invertebrates constitute the majority of animal species and are critical for ecosystem functioning and services. Nonetheless, global invertebrate biodiversity patterns and their congruences with vertebrates remain largely unknown. We resolve the first high-resolution (~20-km) global diversity map for a major invertebrate clade, ants, using biodiversity informatics, range modeling, and machine learning to synthesize existing knowledge and predict the distribution of undiscovered diversity. We find that ants and different vertebrate groups have distinct features in their patterns of richness and rarity, underscoring the need to consider a diversity of taxa in conservation. However, despite their phylogenetic and physiological divergence, ant distributions are not highly anomalous relative to variation among vertebrate clades. Furthermore, our models predict that rarity centers largely overlap (78%), suggesting that general forces shape endemism patterns across taxa. This raises confidence that conservation of areas important for small-ranged vertebrates will benefit invertebrates while providing a “treasure map” to guide future discovery.

Ants belonging to the genus Gnamptogenys are important and diverse predators in the forests of the tropics of the Americas, Southeast Asia, and Australasia. The recent rapid accumulation of these ants in collections rendered the last revision obsolete, raising the number of known species from about 80 to over 120 worldwide. The present study recognizes 49 Old World species, almost half of them new, distributed among 5 species groups. They are present in many entomological collections as the large size of some species and their conspicuousness has caught the attention of even general collectors. Ants figure increasingly in studies of diversity and ecology due to aspects of their biology such as predatory specialization or their reproduction, which includes proper queens in some species and worker reproduction in others. While most species are ground nesters in forests, some are arboreal and others are subterranean. This revision covers all the Old World species and proposes phylogenetic relations among the different species groups. The identification of the species is possible with the aid of keys for workers and queens. The results of working with the keys can be rapidly confirmed by consulting the diagnosis that accompanies each species account, or the full description if need be. The phylogenetic analysis uses a series of internal morphological characters previously unconsidered in ant systematics. Detailed distribution data is also included for each species.

Many studies have focused on the impacts of climate change on biological assemblages, yet little is known about how climate interacts with other major anthropogenic influences on biodiversity, such as habitat disturbance. Using a unique global database of 1128 local ant assemblages, we examined whether climate mediates the effects of habitat disturbance on assemblage structure at a global scale. Species richness and evenness were associated positively with temperature, and negatively with disturbance. However, the interaction among temperature, precipitation and disturbance shaped species richness and evenness. The effect was manifested through a failure of species richness to increase substantially with temperature in transformed habitats at low precipitation. At low precipitation levels, evenness increased with temperature in undisturbed sites, peaked at medium temperatures in disturbed sites and remained low in transformed sites. In warmer climates with lower rainfall, the effects of increasing disturbance on species richness and evenness were akin to decreases in temperature of up to 9°C. Anthropogenic disturbance and ongoing climate change may interact in complicated ways to shape the structure of assemblages, with hot, arid environments likely to be at greatest risk.