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Pamphobeteus sp. "Machala"

🔤 Taxonomy

Pamphobeteus sp. “Machala” is a provisional hobby label, not a formally described species name in World Spider Catalog. Use the full label in records, because shortening it to Pamphobeteus machala makes it look more certain than it is.

The name is usually used for a large Ecuador-associated Pamphobeteus line, but visual identification inside this genus is unreliable. Males, females, and juveniles can look very different, and several South American Pamphobeteus species remain difficult in trade.

Keep supplier, locality, molt, pairing, and offspring records. For provisional names, records are part of the husbandry because they protect the line from being mixed with similar unidentified animals.

English common names and hobby labels:

  • Machala purple bloom
  • Machala steel blue
  • Pamphobeteus sp. “Machala”

📌 Description

Pamphobeteus sp. “Machala” is a large, fast-growing New World terrestrial tarantula valued for dramatic male color and heavy adult size. It is a display animal for confident keepers, not a handling tarantula.

Mature males can show blue, violet, or purple sheen, while females are usually larger and darker with a strong feeding response. Adults can reach about 18-22 cm legspan.

The species-level identity is provisional, but the practical care is clear: low secure housing, deep firm substrate, fresh water, moderate humidity, and no unnecessary contact.

Urticating hairs are the most likely direct exposure during routine work. Use long sleeves, gloves, and eye protection for rehousing or substrate removal, and damp-wipe surfaces instead of brushing dry hairs into the air. A calm feeding response does not make an individual safe to handle.

Females usually retain darker, heavier adult proportions, whereas mature males can become leggier and show the color that made the line popular. Sex and maturity should be confirmed from a suitable molt or adult structures, not guessed from color in a juvenile.

🌍 Distribution

The trade name points to Ecuador, and Machala is a real locality name, but do not treat every animal sold under the label as a verified field-locality specimen. Ask for source and line information where possible.

Use a warm humid terrestrial setup with strong ventilation. Provide a moist retreat and water without turning the whole enclosure into wet mud.

Range map

⚖️ Legal status

As checked against the current CITES Checklist, CITES Appendices, and EU wildlife-trade references on 2026-06-03, no current CITES listing or specific EU Annex listing was found for Pamphobeteus sp. “Machala”. The taxon is not relevant to the Bern Convention because it is not native to Europe.

Local and national rules on collection, export, import, sale, transport, exhibition, breeding, and proof of legal origin may still apply. Keep invoices, breeder details, and import or transfer paperwork where relevant; a non-listed trade status is not proof that every animal was sourced legally.

🤌 Husbandry

Pamphobeteus sp. “Machala” should be housed singly. This is a large predatory spider, and communal trials are not appropriate husbandry.

Spiderlings grow quickly when fed well, so plan staged enclosures before they are needed. Keep early containers simple, secure, and not so large that tiny prey disappears.

Adults need a large low enclosure with a stable lid, generous floor area, deep substrate, and a broad retreat. Use tools and a catch cup for maintenance; do not rely on temperament.

Rehouse after the spider has clearly outgrown usable floor space, not during premolt and not immediately after feeding. Set the new enclosure inside a closed, uncluttered room, align the two openings, and use a clear catch cup as the transfer zone. Never prod from the abdomen or block a bolting spider with a hand. If the animal becomes defensive, close both containers and resume later rather than escalating the disturbance.

A practical adult footprint is about 45 x 30 cm, with 12-18 cm of compactable substrate and little open height above it. Prepare the full adult enclosure early because this line can gain size quickly. Place the water dish near the access point so routine refilling does not require crossing the retreat entrance.

Quarantine new animals for at least 60-90 days with separate tongs, dishes, and cleaning materials. Record molt dates, appetite, feces, body condition, and any mites. For a provisional trade line, photograph molts and preserve supplier and transfer details alongside the care record.

Build the setup around:

  • large low enclosure
  • deep firm substrate
  • wide hide with a dry entrance
  • water dish and one moister corner
  • locks or a secure tight lid

💡 Lighting

No UVB or specialist lighting is required. A normal day-night rhythm is enough.

If the enclosure is displayed, keep lighting cool and indirect. Bright heat dries the retreat and can increase defensive behavior.

🌡 Heating and temperature

Keep daytime temperatures around 22-27°C and nights around 20-23°C. Avoid hot lamps and windowsills, especially with spiderlings in small containers.

Warm the room or use gentle side heat controlled by a thermostat if supplemental heat is needed. The spider must always be able to retreat from the warmest area.

💧 Humidity and water

Aim for 65-80% with fresh water and a moisture gradient. A damp corner or lower layer is usually better than spraying the whole enclosure every day.

Ventilation matters. Humid stagnant air encourages mold and mites, while a dry enclosure with no water access can dehydrate a fast-growing juvenile before a molt.

Pour water slowly down one side so the lower substrate remains damp while much of the surface can dry. Use the condition of the substrate, retreat, and spider rather than chasing a single hygrometer reading. Persistent condensation, a sour smell, or widespread mold means moisture is accumulating faster than the enclosure can ventilate.

🌿 Enclosure and decoration

Use a heavy layer of substrate that holds shape and absorbs overflow from the water dish without staying sour. Partly bury cork bark or a hide so the spider can expand it.

Keep hard decor low and stable. This tarantula is heavy enough for a fall to be serious and strong enough to move light decorations.

🪳 Feeding

Feed roaches, crickets, locusts where legal, and occasional worms. Juveniles can eat often during growth, while adults usually do well with a suitable meal every 7-14 days.

Strong appetite is normal, but obesity is avoidable. Let the abdomen and molt cycle set the feeding pace, and remove prey before molts.

After a molt, wait for black fangs and coordinated movement before feeding—several days for juveniles and roughly a week or more for large adults. Remove any feeder that burrows out of sight. Prey left beside a soft spider can turn a normal molt into an injury.

🩺 Common problems

Common problems include overfeeding, fall injury, stale wet substrate, dehydration before molts, bolting at the door, and mixed-line breeding caused by vague labels.

If the spider becomes defensive during water changes, close the enclosure and reset. Plan the next maintenance with longer tools, a catch cup, and a simpler path to the water dish.

A sealed retreat and temporary food refusal usually indicate premolt, not an emergency. Keep water available and do not open the burrow unless it is flooding or collapsing. A shrinking abdomen, loss of coordination, leaking hemolymph, or persistent decline warrants advice from an exotics veterinarian.

📌 Conclusion

Pamphobeteus sp. “Machala” is for keepers who can manage a large, fast terrestrial spider and keep careful identity records. The reward is a spectacular display animal; the price is secure housing and disciplined maintenance.

📚 Sources and further reading