Recurvidris recurvispinosa
- Scientific Name
- Recurvidris recurvispinosa
- Tribe
- Crematogastrini
- Subfamily
- Myrmicinae
- Author
- Forel, 1890
- Distribution
- Found in 8 countries
Recurvidris recurvispinosa Overview
Recurvidris recurvispinosa is an ant species of the genus Recurvidris. It is primarily documented in 8 countries , including China, Indonesia, India. Detailed taxonomic data and occurrence records can be further explored via authoritative databases such as AntWeb or the Global Biodiversity Information Facility (GBIF).
Recurvidris recurvispinosa
Recurvidris recurvispinosa is a tiny myrmicine ant measuring just 1.7-2.1mm in worker length, with a distinctive yellow to yellowish-brown body color [1][2]. The species gets its name from the uniquely curved propodeal spines that point forward rather than backward, a striking feature visible under magnification [1]. Workers have four sharp teeth on their mandibles, with the basal tooth enlarged and having two tips [1]. The head is slightly longer than broad with a nearly straight posterior margin, and the body is covered in fine reticulate-punctate sculpture giving a slightly matte appearance [1]. This is the most widely distributed species in the genus Recurvidris, found across South Asia, Southeast Asia, and into East Asia [1]. In the wild, these ants are predators of small soil arthropods, researchers found a springtail (Sminthurides parvulus) in the mandibles of one worker, confirming they hunt micro-arthropods in leaf litter and soil [2].
Quick Summary
- Difficulty: Medium
- Origin & Habitat: Native to South and Southeast Asia, ranging from India through China, Taiwan, Japan, Thailand, and Laos [1][3]. In Thailand, they inhabit various forest types including dry evergreen forest, mixed deciduous forest, and dry dipterocarp forest [1]. In Japan, they are rarely encountered, nesting in soil or under stones in forests and forest margins [3]. Found across 14 Indian states from the Himalayas to southern regions [4].
- Colony Type: Colony structure is unconfirmed, the number of queens and colony organization has not been documented in scientific literature. Workers are found in leaf litter and soil, with single colonies collected by sifting leaf litter in Thailand [1].
- Size & Growth:
- Queen: Approximately 2mm [5], estimated from limited queen measurement data
- Worker: 1.70-2.10mm [1][2]
- Colony: Unknown, likely small colonies based on typical litter-dwelling ant sizes
- Growth: Unknown, likely moderate based on related Myrmicinae patterns
- Development: Estimated 6-8 weeks at optimal temperature based on genus-level inference from similar small Myrmicinae (Development time is unconfirmed for this species, estimates based on typical patterns for small tropical/subtropical Myrmicinae ants)
- Antkeeping:
- Temperature: Keep at 22-26°C as a starting range. Based on their distribution across tropical Thailand and subtropical Japan/China, they likely prefer warm conditions. Avoid temperatures below 18°C or above 30°C.
- Humidity: Moderate to high humidity, they live in forest floor leaf litter and soil. Keep the nest substrate consistently moist but not waterlogged, with some drier areas available.
- Diapause: Unknown, their range includes subtropical Japan where winters are mild, but specific overwintering behavior has not been documented. Consider a cool period (15-18°C) for 2-3 months if keeping temperate-origin colonies.
- Nesting: Natural nesting is in soil or under stones in forest environments [3]. In captivity, a naturalistic setup with moist soil/leaf litter mixture works well, or a Y-tong/plaster nest with small chambers. They are tiny, so chambers should be appropriately scaled.
- Behavior: These are small, cryptic ants that forage in leaf litter and soil. They are predatory on small arthropods like springtails and mites [2]. Workers are not aggressive and likely rely on their small size and cryptic habits. Escape prevention is critical due to their tiny 2mm size, they can squeeze through standard test tube barriers. Use fine mesh and tight-fitting lids. They are rarely encountered in the wild, suggesting they are secretive and not surface-active.
- Common Issues: escape prevention is critical due to tiny 2mm size, they easily slip through standard barriers, predatory diet requires live small prey (springtails, micro-mites) which can be difficult to culture, secretive nature means low activity levels, beginners may think colonies are dead, wild-caught colonies may have parasites from leaf litter environment, slow growth and small colony sizes mean patience is required
Housing and Nest Setup
Recurvidris recurvispinosa is a tiny ant that requires appropriately scaled housing. In the wild, they nest in soil or under stones in forest environments [3]. For captivity, a naturalistic setup with a soil/leaf litter mixture works best, this mimics their natural forest floor habitat and provides hunting grounds for their predatory lifestyle. Alternatively, a Y-tong (AAC) or plaster nest with small, tight chambers can work, but ensure the chambers are appropriately sized for their 2mm body size. Because they are so small, standard test tube setups may allow escapes, use fine mesh barriers and check connections regularly. The nest area should be kept humid but allow for some moisture gradient so ants can self-regulate.
Feeding and Diet
These ants are predatory on small arthropods. In the wild, researchers found a springtail (Sminthurides parvulus) in a worker's mandibles, confirming they hunt micro-arthropods in leaf litter and soil [2]. In captivity, their primary food should be live small prey such as springtails, tiny soil mites, and other micro-arthropods. They are unlikely to accept larger prey items. Sugar sources may be accepted occasionally but should not be relied upon as a primary food, their natural diet is protein-based. Feed small prey items every 2-3 days, adjusting based on colony consumption. Remove uneaten prey to prevent mold.
Temperature and Seasonal Care
Based on their distribution across tropical Thailand and subtropical regions of Japan/China/Taiwan, these ants prefer warm conditions. Aim for temperatures in the 22-26°C range. In Thailand, they occur in areas north of the Isthmus of Kra and in various forest types including dry evergreen, mixed deciduous, and dry dipterocarp forest [1]. In Japan, they are found in the Yaeyama Islands (Ishigaki and Iriomote), which have a subtropical climate [3]. Avoid temperatures below 18°C or above 30°C. Specific overwintering requirements are unknown, but if keeping colonies from temperate regions (Japan/China), consider providing a cool period around 15-18°C for 2-3 months during winter months.
Behavior and Observation
Recurvidris recurvispinosa is a secretive, cryptic species that is rarely encountered in the wild [3]. Workers forage in leaf litter and soil rather than on open surfaces. They are not aggressive and likely rely on their small size and cryptic habits to avoid predators. Colonies are small, and you won't see the dramatic foraging trails common in larger ant species. Activity levels are typically low, don't be alarmed if workers spend most of their time in the nest or within the leaf litter layer. This is normal behavior for litter-dwelling ants. Observation is best done with magnification, as their defining features (the curved propodeal spines,4-dentate mandibles) are small-scale characteristics.
Finding and Collecting
This species is rarely encountered and considered rare in Japan [3]. In Thailand, all specimens have been collected from the forest floor, with single colonies found by sifting leaf litter [1]. They are distributed across 14 Indian states [4] and have been recorded from forests in China, Nepal, Myanmar, Laos, Taiwan, and Sri Lanka. If you wish to find this species in the wild, focus on moist forest floor habitats with accumulated leaf litter. Use sifting methods to collect leaf litter samples and look for tiny yellow ants. They are easily overlooked due to their small size.
Identification Tips
Recurvidris recurvispinosa can be identified by several key features: their tiny 1.7-2.1mm size, yellow to yellowish-brown color, and most distinctively, the propodeal spines that curve forward (recurved) rather than backward [1]. Workers have four teeth on their mandibles, with the basal (fourth) tooth enlarged and having two tips (bidenticulate) [1]. The head is slightly longer than broad with a nearly straight posterior margin. The mesosoma has fine reticulate-punctate sculpture. They are closely related to Recurvidris hebe from Sulawesi, but differ in having shorter, stouter propodeal spines and petiolar peduncle [1]. Under magnification, the curved spines are the most obvious diagnostic feature.
Frequently Asked Questions
How long does it take for Recurvidris recurvispinosa to develop from egg to worker?
The exact development time is unconfirmed for this species. Based on typical patterns for small Myrmicinae ants in tropical/subtropical conditions, estimate approximately 6-8 weeks from egg to first worker at optimal temperature (22-26°C). This is an educated guess rather than a documented timeline.
What do Recurvidris recurvispinosa ants eat?
They are predatory on small arthropods. In the wild, they hunt springtails and other micro-arthropods in leaf litter and soil [2]. In captivity, feed them live springtails, tiny soil mites, and other small live prey. Sugar sources may be accepted occasionally but should not be the primary food.
Can I keep Recurvidris recurvispinosa in a test tube setup?
You can use a test tube setup, but escape prevention is critical due to their tiny 2mm size. Standard test tube barriers may not be sufficient, use fine mesh and check all connections regularly. A naturalistic setup with moist soil and leaf litter is actually preferable as it mimics their natural forest floor habitat and provides hunting grounds.
Do Recurvidris recurvispinosa ants sting?
As a Myrmicinae ant, they have a stinger, but due to their tiny size and secretive nature, stinging is not a concern for keepers. They are not aggressive and rarely come to open areas where they might encounter humans.
Are Recurvidris recurvispinosa good for beginners?
This species is rated as Medium difficulty. While not the most challenging ant, they are not ideal for complete beginners due to their specific predatory diet requirements (live small prey), tiny size making escape prevention difficult, and secretive low-activity behavior that may cause concern. They require more specialized care than common beginner species like Lasius or Camponotus.
How big do Recurvidris recurvispinosa colonies get?
Colony size is not well documented, but based on typical patterns for small litter-dwelling ants, colonies likely reach a few hundred workers at most. They are secretive ants with low activity levels, so large, visible colonies should not be expected.
Do Recurvidris recurvispinosa need hibernation?
Diapause requirements are unconfirmed. Their range includes subtropical Japan where winters are mild but distinct. If keeping colonies from Japan or northern parts of their range, consider providing a cool period (15-18°C) for 2-3 months during winter. For tropical populations (Thailand, India), hibernation is likely not necessary.
Why are my Recurvidris recurvispinosa not foraging much?
This is normal behavior. They are secretive, cryptic ants that forage within leaf litter and soil rather than on open surfaces [3]. Low activity is typical for the species, they are not aggressive foragers like larger ant species. Ensure they have appropriate prey available and that the setup provides a humid leaf litter layer for hunting.
When should I move Recurvidris recurvispinosa to a formicarium?
Given their small size and natural habitat in soil/leaf litter, a naturalistic setup is often best from the start. If using a formicarium, wait until the colony has at least 20-30 workers and is actively foraging. The transition should be gradual, and the formicarium should have appropriately scaled chambers and excellent escape prevention.
Where is Recurvidris recurvispinosa found in the wild?
They are found across South and Southeast Asia: India, Nepal, Myanmar, Laos, Thailand, China, Taiwan, and Japan [1][3]. In Thailand, they inhabit various forest types north of the Isthmus of Kra [1]. In Japan, they are only found on Ishigaki and Iriomote Islands in the Yaeyama group [3]. They live in forest floor leaf litter and soil.
References
This caresheet is licensed under CC BY-SA 4.0 .
Literature
Loading...Loading products...