Aphonopelma Seemanni (Costa Rican Stripe Knee Tarantula)

Scientific Name: Aphonopelma Seemanni

Name Pronunciation: Aphonopelma (uh-fone-uh-PEL-muh) Seemanni (SAY-muh-nee)

Common Name: Costa Rican Stripe Knee 

Name Meaning:  Derived from Greek, aphonopelma is split in two parts: “áphonos” means soundless or silent and ‘pelma’ means “sole” or “foot”. seemanni derived from Latin  honors Berthold Carl Seemann, a Danish-born naturalist and botanist who studied Central American flora and fauna

Classification: New World

Type: Terrestrial

Experience level: Beginner-Intermediate 

Life Expectancy: Females live 15-20 years; Males live 5-10 years

Size: 5 1/2” (14cm) DLS (Diagonal Leg Span)

Growth Rate: Slow-Medium 

Natural Habitat: Costa Rica, Nicaragua & Honduras

Housing Needs: substrate 5”+, one or more hides, waterbowl

Temperature: 70°–85°F (21°–29°C)

Humidity: Semi-arid

Temperament: Skittish

About: Aphonopelma seemanni, commonly known as the Costa Rican Striped-Knee Tarantula, is a New World terrestrial species admired for its striking contrast of dark coloration and bold white or cream leg striping that gives it a distinctive “zebra-like” appearance. Adults typically display a dark brown to nearly black body with pale bands along the legs, while younger specimens are more uniformly brown before developing their characteristic markings. Native to Central America—including Costa Rica, Guatemala, Honduras, and Nicaragua—this species is well adapted to warm environments where it constructs protective burrows. 

Known for a temperament that is generally calm yet noticeably skittish, A. seemanni is more likely to retreat or kick urticating hairs than act aggressively when disturbed. Handling is often discouraged due to their speed and tendency to flee, but bites are uncommon and venom is considered mild. Females commonly live around 15–20 years, while males typically survive about 5–7 years.

Originating from burrow-based habitats, this species thrives in a terrestrial enclosure with deep substrate for digging, a secure hide, and a shallow water dish. Temperatures are best maintained around 70–85°F (21–29°C) with moderate to high humidity and good ventilation. Spiderlings spend much of their time underground, while larger individuals may remain near their hide or emerge to explore, making them an engaging display species. A. seemanni is often recommended for beginner to intermediate keepers, and is an excellent addition to any collection!