Origin And Natural Habitat
The Diamantina municipality in the Brazilian state of Minas Gerais is the type locality of Dolichothele diamantinensis — a species described in 2009 from this specific highland locality in the rocky plateau country of southeastern Brazil. The broader habitat is the Cerrado — Brazil’s vast tropical savanna biome that occupies much of the country’s interior plateau — specifically the sun-blasted, windy, rocky savannas of southeast Brazil where sparse vegetation, exposed rock, and dry, well-drained soils create a habitat more reminiscent of the Venezuelan scrubland where the Green Bottle Blue lives than the continuously humid tropical rainforest that dominates the popular image of Brazilian wildlife.
This habitat context is the single most important care insight for this species. The Cerrado of Minas Gerais is seasonally dry, windswept, and characterised by well-drained rocky soils — not a humid tropical environment. The species comes from a dry scrub habitat with sparse opportunities to catch prey in the wild, which explains both the aggressive feeding response that makes every meal with this species an event and the dry substrate requirements that catch keepers expecting tropical humidity off guard. Species faces habitat challenges due to alterations in its native range — the Brazilian Cerrado is one of the most threatened biomes on Earth, with the majority of its original extent already converted to agriculture — making captive breeding conservation-meaningful rather than merely preferable.
Scientific Classification
Described by Bertani, Santos, and Righi in 2009 as Oligoxystre diamantinensis from the Diamantina municipality, the species was subsequently moved to the genus Dolichothele as the taxonomy of this group of small Brazilian theraphosids was refined. The species name diamantinensis is a Latinised form of Diamantina, the municipality of the type locality. It also circulates under the former genus placement as Oligoxystre diamantinensis in older hobby literature. The World Spider Catalog and iNaturalist confirm D. diamantinensis Bertani, Santos & Righi, 2009 as the current valid name.
Species Overview
The comparison to the Green Bottle Blue is inevitable and accurate — both species inhabit dry scrubland habitats in South America, both are heavy webbers with aggressive feeding responses, and both carry extraordinary colour palettes that make them among the most visually striking tarantulas available. The Brazilian Blue Beauty simply takes that comparison and escalates every element. The colours are even more vibrant than those of the more famous Green Bottle Blue, delivered in a dwarf package with no urticating hairs — one of the few New World tarantulas that completely lacks urticating hairs, a characteristic that distinguishes it from most New World species and that gives the keeper a different defensive risk profile to manage. For newer keepers who like the way a GBB looks but are intimidated by its skittishness and size, this spunky little dwarf is an excellent alternative. Beginner to intermediate experience is appropriate.
Appearance And Size
Think metallic red, orange, turquoise, green, and royal blue structural colours all on the same spider — the Brazilian Blue Beauty’s colour palette is not a single dramatic feature but a full spectrum of shifting structural iridescence that changes as the spider moves and as the light angle changes. The electric blue legs, golden carapace, and dense webbing combine with red-orange setae on the abdomen and a greenish iridescence on the carapace to create a colour combination that looks digitally enhanced even in natural light. Crucially, spiderlings show adult colouration as early as third or fourth instar — meaning even tiny slings display the full colour palette that is typically only seen at adult size in most species, making the grow-out journey genuinely spectacular from the very beginning.
Female Brazilian Blue Beauty tarantulas rarely exceed 3.5 inches diagonal leg span — genuinely dwarf territory. Growth rate is medium to fast. The combination of fast growth and early adult colouration means keepers see the full colour display sooner than most comparable species.
Housing
A small terrestrial enclosure appropriate for a dwarf species, with an important nuance — having a little height with taller anchor points for webbing makes this species happy, giving it a semi-arboreal character in practice despite being fundamentally terrestrial. Larger juveniles and mature specimens are easily maintained in a well-ventilated vertical or terrestrial enclosure with plenty of substrate. A footprint of 8 by 8 to 10 by 10 inches suits adults at 3 to 3.5 inches legspan, with cork bark or branches reaching upward from the substrate surface to give anchor points for the elaborate webbing this species constructs enthusiastically from ground level upward. A latching lid is essential. Slings, described by keepers as teleporters for their extraordinary speed, require small, secure vial-format enclosures with no gaps at all. Our best tarantula enclosure guide covers formats appropriate for small semi-arboreal Brazilian dwarf species, and our best tarantula sling enclosure guide covers the small secure vial formats for early instars.
Enclosure’s Decorations
Cork hides and branches and dead leaves give the species anchor points for its copious webbing — faux plants and sticks for webbing attachment are specifically recommended by keeper experience. The enclosure of a settled adult D. diamantinensis — with elaborate silk architecture extending from the substrate upward and across every available surface and anchor point — is one of the more impressive small-enclosure displays available in the hobby. A shallow water dish for specimens over 1.5 inches provides hydration. Our best tarantula cork bark and best tarantula fake plants guides cover appropriate structures for Brazilian dwarf semi-terrestrial webbing species.
Substrate
Dry, airy cactus mix or wood-pulp containing garden soil mixes amended with perlite or pumice — a dry, well-draining substrate appropriate for the sun-blasted rocky savanna habitat of Minas Gerais. Keep their substrate dry and only occasionally mist a corner of the cage — this is a dry scrub species, not a tropical rainforest species, and the care profile is closer to the Green Bottle Blue than to humid Brazilian species. Moderate substrate depth of 2 to 3 inches for adults is sufficient — this species is not a deep burrower. Our best tarantula substrate guide covers dry well-draining blends appropriate for Brazilian savanna dwarf species.
Water And Humidity
A shallow water dish for specimens over 1.5 inches, refreshed every two to three days. Humidity of 65 to 75 percent is appropriate — moderate, consistent with the dry scrubland character of the Minas Gerais Cerrado habitat. Occasional misting of one corner of the enclosure provides the moisture pulse character of the Brazilian wet season without maintaining chronic humidity. A hygrometer confirms actual conditions, and a misting bottle handles targeted corner moisture additions.
Heating And Temperature
The Brazilian Cerrado plateau experiences warm temperatures with meaningful seasonal variation. A captive range of 75 to 85°F suits this species well — warmer temperatures produce faster growth and more frequent moults. Most temperate indoor environments provide appropriate conditions without supplemental heat for much of the year. A side-mounted heat mat controlled by a thermostat handles cooler periods. A thermometer at enclosure level confirms actual conditions.
Diet And Nutrition
Being dry scrub dwellers with sparse opportunities to catch prey in the wild, this species has a strong feeding response and actively pursues prey — appropriately sized small crickets, dubia roaches, and similar prey weekly for adults. Slings take hatchling feeders from the earliest instars. As soon as the enclosure is opened, they will pop up with great curiosity — an active, bold feeding interaction that makes every meal genuinely engaging for a dwarf species. Remove uneaten prey within 24 hours. Our best tarantula food guide covers feeder sizing options relevant to active dwarf Brazilian savanna terrestrial species.
Compatibility
Solitary only. The absence of urticating hairs means the mating introduction carries a slightly different risk profile from most New World species — the male has no hair-based warning system to rely on, and the female’s defensive response will be speed and biting rather than hair-kicking. A well-fed female and supervised introduction are essential.
Behavior And Temperament
Both bold and skittish — the paradoxical temperament characterisation that captures this species precisely. Slings are extremely fast — described as teleporters by keepers who have rehoused them — darting into their burrows at the slightest disturbance. As they put on more size, they become much more calm and bold, with adults described as fast but inquisitive, curious about enclosure openings rather than fleeing them. The complete absence of urticating hairs is a notable care characteristic — no hair-kicking defensive response means the keeper does not have to manage the irritation risk that most New World species introduce, though the spider’s speed still makes calm, deliberate movements essential during all maintenance.
Handling
Possible for calm settled adults given the docile mature temperament and the absence of urticating hairs, though the speed of juveniles makes handling them genuinely challenging. Standard floor-level protocol with slow movements. Venom is medically insignificant to healthy humans. The iridescent structural colour visible at close range on a settled adult is one of the most rewarding small-tarantula handling experiences available.
Health And Lifespan
Lifespan is not precisely documented but the dwarf adult size suggests females live in the range of 8 to 12 years. The species is described as a tough, hardy species within appropriate dry savanna conditions. Primary health risk is excess moisture for a dry Cerrado species — chronic dampness is more harmful than beneficial for this habitat specialist. Our tarantula dehydration article covers the opposite concern.
Price
Available from specialist vendors with good regularity given the established captive breeding. Fear Not Tarantulas and Spider Shoppe both stock this species consistently. Slings typically sell for $30 to $70 USD — more accessible than the rarest dwarf species but reflecting the genuine visual quality that drives demand. Juveniles range from $60 to $120. Confirmed adult females command $100 to $180 depending on size and source. Source captive-bred specimens only — Brazil’s exportation ban and the documented Cerrado habitat loss make responsible captive sourcing both legally and ecologically essential. Everything needed to provide appropriate Brazilian Cerrado conditions for this iridescent pocket jewel is on our best tarantula products page.