tetragnathius
Could not find tetragnathii in Logeion dictionaries.
tetragnathii Noun: masculine nominative plural, Noun: masculine vocative plural, Noun: masculine genitive singular of tetragnathius
tē̆trăgnăthĭus, ii, m., = τετράγναθος (having four jaws),
- a kind of poisonous spider, Plin. 29, 4, 27, § 87.
tetragnathius, iī, n. (τετράγναθος, mit vier Kinnladen), eine giftige Spinnenart, Plin. 29, 87.