Psalmopoeus irminia • 1+”


Psalmopoeus irminia (Venezuelan sun tiger), found in forests of the Venezuela/Guyana border region and Gran Sabana, captive bred. One of the larger Psalmopoeus, with stark black and orange, recommended for advanced beginners and above.

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In 1991, in eastern Venezuela, Frank Saager found specimens of what he was to call Psalmopoeus irminia. He recorded the locality as “Estado Guyana and the Gran Sabana.” [1]

Saager refers to land between Venezuela and Guyana (hatched area) as Estado Guyana. Estado Guyana (Guayana) is a former Venezuelan state with land still contested between the two countries. The Gran Sabana (Great Savannah) is an expansive, geologically unusual area in southeast Venezuela. It extends partly into Guyana (contested region) and northern Brazil.

Throughout the rolling plains that dominate the Gran Sabana are spectacular geological features, including sedimentary massifs (tepuis), sprawling cave systems, underground rivers, and sinkholes. All are the result of eons of water acting on calcium carbonate. One of the localities Saager reports is the 7,671 ft. Roraima Tepui. Presumably he means vicinity of Roraima, as he also states P. irminia is not found above 2,000 ft.

Triple Point
San Ignacio, Roraima Tepui, and Santa Elena are specific localities for P. irminia in the Gran Sabana.

Elsewhere in the Gran Sabana, Saager documents two other localities besides the Roraima (see left):

Within the regional locality of Estado Guyana and the Gran Sabana, Saager says P. irminia is widespread but not common. He reports finding them on trees in areas of contiguous forest, under bark or in holes associated with branches or roots. These forests, says Saager, are becoming rare due to centuries of slash and burn.

Auyan Tepui
Auyan Tepui with an Uruyen indigenous village and forested/deforested areas in the foreground.

The forests receive seasonal rainfall. According to Saager, day/night extremes of 104/59F (40/15C) are not uncommon. He documents mating occurring in the dry season (December to June), with spiderlings emerging in 7-8 weeks (5-6 weeks for first instar), numbering 50-200 (100 typical) [1].

In habitat detail, Saager’s account is rich compared to most scientific descriptions, with information helpful to keeper and breeder alike. May the above enriche your experience with this species.

[1] Saager, F. (1994). Psalmopoeus irminia sp. n., Beschreibung einer neuen Aviculariinae (Theraphosidae, Aviculariinae, genus Psalmopoeus) inclusive einem Vergleich mit Psalmopoeus cambridgeiArthropoda 2: 59-71.

Additional information

Weight .01 lbs
Dimensions 1 × 0.5 × 0.5 in