Brazilian Blue Dwarf Beauty Tarantula (Dolichothele diamantinensis) Care Guide, Habitat, and Natural History

The Brazilian Blue Dwarf Beauty Tarantula, Dolichothele diamantinensis, is one of Brazil's most attractive small tarantulas. While it never reaches the impressive size of species like Lasiodora or Acanthoscurria, what it lacks in stature it makes up for with striking metallic blue coloration, heavy web production, and an active personality that keeps it visible far more often than many similarly sized species.

Originally known in the hobby under the genus Oligoxystre, this tarantula was later reassigned to Dolichothele following taxonomic revisions. It has steadily become a favorite among collectors who appreciate dwarf species that display vivid colors without requiring large enclosures.

Its combination of manageable size, attractive appearance, and fascinating web-building behavior has made it one of the standout dwarf tarantulas available in captivity.

Quick Species Facts

Scientific Name: Dolichothele diamantinensis

Common Name: Brazilian Blue Dwarf Beauty Tarantula

Family: Theraphosidae

Type: New World dwarf terrestrial to semi-fossorial tarantula

Native Range: Bahia, Brazil

Adult Leg Span: Approximately 3–4 inches (7.5–10 cm)

Growth Rate: Moderate to fairly quick

Temperament: Generally calm but fast-moving

Urticating Hairs: Yes (Type III)

Lifespan:

• Females: 12–18 years

• Males: 3–5 years

Experience Level: Beginner to Intermediate

The Chapadas of Bahia: A Unique Brazilian Landscape

Unlike the humid Amazon Basin that many people associate with Brazil, Dolichothele diamantinensis comes from the state of Bahia, particularly around the Chapada Diamantina region. This landscape differs dramatically from tropical rainforest.

Chapada Diamantina is a vast plateau carved by millions of years of erosion into towering sandstone cliffs, deep canyons, waterfalls, rocky valleys, and isolated mountain peaks. Elevations often exceed 4,000 feet (1,200 meters), creating cooler nights and highly varied microclimates compared to the surrounding lowlands.

Within this rugged landscape are patches of cerrado savanna, rocky grasslands known as campo rupestre, gallery forests following rivers, and pockets of humid vegetation protected within shaded valleys. The soils are often sandy or rocky, with abundant leaf litter accumulating beneath shrubs, fallen logs, and exposed roots.

These diverse habitats support an extraordinary number of endemic plants and animals. Many species found within Chapada Diamantina occur nowhere else on Earth, making it one of Brazil's most important biodiversity hotspots.

Appearance

The Brazilian Blue Dwarf Beauty is proof that remarkable coloration isn't limited to giant tarantulas.

Adults develop a beautiful metallic blue sheen across much of the legs, particularly under natural light. Depending on age, molt cycle, and lighting, individuals may also display shades of steel blue, lavender, silver-gray, and subtle violet highlights.

The abdomen is typically darker and covered in reddish to copper-colored setae that contrast nicely with the cooler tones of the legs.

Because adults remain relatively compact, the vivid colors often appear even more concentrated than on larger species.

A Heavy Web Builder

One of the defining characteristics of Dolichothele diamantinensis is its enthusiasm for web construction.

Rather than simply lining a burrow with silk, this species frequently covers much of its enclosure with dense sheets of webbing. Silk tunnels often connect hides, anchor points, feeding areas, and entrances into an intricate network that expands over time.

Many keepers find the elaborate web structures to be one of the species' greatest attractions, making the enclosure itself become part of the display.

Behavior

Despite being a terrestrial species, Dolichothele diamantinensis makes excellent use of every available surface.

Individuals commonly establish shallow burrows beneath cork bark or natural cover before extending extensive silk across surrounding substrate and decorations. Others may spend surprisingly little time underground, preferring to remain near the entrance of their retreat.

Like many dwarf tarantulas, they rely more on speed than intimidation. When disturbed they usually retreat rapidly into webbing rather than standing their ground.

Although generally regarded as relatively calm, personality varies. Some specimens remain visible throughout the evening, while others are more secretive depending on enclosure design and individual temperament.

Enclosure Setup

An adult does not require a particularly large enclosure due to its modest size.

Many hobbyists successfully house adults in enclosures around 8–12 inches in length, provided there is sufficient floor space for web construction.

Rather than emphasizing height, most keepers focus on creating multiple anchor points using cork bark, branches, leaf litter, or stones. These allow the spider to construct the complex silk network for which the species is known.

A hide should always be available, even if the spider ultimately chooses to modify or ignore it.

Substrate

In the wild, this species encounters well-drained soils mixed with organic debris rather than permanently saturated ground.

Many successful keepers use coconut fiber, organic topsoil, peat-based mixes, or combinations that hold enough moisture to prevent excessive drying while still allowing air exchange through the substrate.

Exactly how moist to keep the enclosure varies among experienced keepers. Some prefer allowing most of the substrate to dry between waterings, while others maintain slightly higher moisture in deeper layers. Both methods can work when paired with good ventilation and attention to the spider's overall condition.

The objective is stability rather than chasing a specific humidity number.

Temperature and Humidity

Typical household temperatures between 70–78°F (21–26°C) are generally appropriate.

Humidity is often discussed with this species, but many keepers find that maintaining a moisture gradient works better than attempting to maintain a fixed percentage. Allowing part of the enclosure to remain slightly more humid while other areas dry provides the tarantula with choices that better resemble natural conditions.

A clean water dish should always be available.

Feeding

The Brazilian Blue Dwarf Beauty is an eager feeder despite its small size.

Crickets, roaches, mealworms, red runners, and other appropriately sized feeder insects are readily accepted.

Juveniles usually feed more frequently while growing, whereas adults often require less frequent meals. Feeding schedules are best adjusted according to body condition and molt cycle rather than following a strict calendar.

Refusing food before molting is perfectly normal.

Molting

Like all tarantulas, Dolichothele diamantinensis periodically molts to continue growing.

Color often appears dull before a molt, activity decreases, and feeding usually stops. Freshly molted individuals frequently display their brightest blue coloration before gradually darkening as the exoskeleton ages.

Prey should not be introduced until the spider has had adequate time to harden following the molt.

Temperament and Handling

Although generally considered a manageable species, handling is rarely necessary.

Their primary defense is speed, and even calm individuals can bolt unexpectedly. Since dwarf tarantulas are particularly vulnerable to injury from falls, observing them inside the enclosure is generally safer for both the spider and the keeper.

Bioactive Compatibility

Because Dolichothele diamantinensis naturally inhabits environments rich in decomposing organic material, many hobbyists enjoy maintaining it in naturalistic or bioactive enclosures.

A well-established substrate containing springtails can help recycle waste and maintain long-term enclosure health. Products such as Vivarium Naturals Arachno Thrive Tarantula Burrowing Substrate and Terra Thrive Bioactive Vivarium Substrate are designed to provide moisture retention while remaining suitable for burrowing species. Additional materials like Vivarium Naturals vivarium-grade sphagnum moss, expanded clay drainage nodules, hardwood leaf litter, cork bark, and botanical accents can be incorporated depending on the enclosure design and the keeper's preferred husbandry style.

Whether choosing a simple natural setup or a fully bioactive enclosure, maintaining clean conditions and good ventilation remains more important than any single substrate recipe.

Is the Brazilian Blue Dwarf Beauty a Good Beginner Tarantula?

Many hobbyists consider Dolichothele diamantinensis an excellent introduction to dwarf tarantulas.

Its husbandry is relatively forgiving, it remains small enough for modest enclosures, and its extensive web-building behavior makes it highly visible and interesting to observe.

Its quick movements may surprise first-time keepers, but it lacks the defensive reputation associated with many faster Old World species.

Final Thoughts

The Brazilian Blue Dwarf Beauty Tarantula demonstrates that impressive display animals don't need to be large. Its shimmering blue legs, intricate web construction, compact size, and active personality combine to create one of the most rewarding dwarf tarantulas available in the hobby.

Coming from the remarkable sandstone plateaus and isolated ecosystems of Bahia's Chapada Diamantina, Dolichothele diamantinensis represents a unique piece of Brazil's extraordinary biodiversity. Whether appreciated for its vibrant coloration or admired for its remarkable engineering skills with silk, this species continues to earn its reputation as one of the finest dwarf tarantulas in modern collections.