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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.

🌍 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.

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.

🌿 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.

🩺 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.

📌 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