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Main menu. Main menu. move to sidebar hide. Navigation ... The Theraphosinae are a large subfamily of Mygalomorphae spiders in the family Theraphosidae found ...
Hemirrhagus is a genus of Mexican tarantulas that was first described by Eugène Louis Simon in 1903. [3] It is considered a senior synonym of Spelopelma. [2] Species of the genus Hemirrhagus are 5 to 12 cm long, usually black in colour, the urticating hairs on the opisthosoma are arranged in one dorsomedian patch, two dorsal paramedian patches, or two lateral patches.
A further control on the morphology and characteristics of a deposit is the water to magma ratio. It is considered that the products of phreatomagmatic eruptions are fine grained and poorly sorted where the magma/water ratio is high, but when there is a lower magma/water ratio the deposits may be coarser and better sorted. [4]
Bistriopelma has two distinctive patches of Type III urticating setae, which are located dorsolaterally on the abdomen, each with a long stripe of thicker setae, which runs diagonally to the longitudinal body axis.
The distribution of hairs on the legs and palp and the shape of the male and female genitalia are the diagnostic features of the genus. In common with species of Tliltocatl, the prolateral (forward facing) surface of the trochanter and femur of the first leg and the retrolateral surface of the pedipalp have plumose hairs, and there is no pad of plumose hairs on the femur of the fourth leg.
Hapalotremus is a genus of South American tarantulas in the Theraphosinae subfamily that was first described by Eugène Louis Simon in 1903. [2] They have red or white Type III urticating (relatively long, thin) hairs, [3] up to 1.2 millimetres (0.047 in), with a fine point and barbs along at least half of the lower part.
Magmatism is the emplacement of magma within and at the surface of the outer layers of a terrestrial planet, which solidifies as igneous rocks. It does so through magmatic activity or igneous activity, the production, intrusion and extrusion of magma or lava. Volcanism is the surface expression of magmatism.
A volcanic plug, also called a volcanic neck or lava neck, is a volcanic object created when magma hardens within a vent on an active volcano. When present, a plug can cause an extreme build-up of high gas pressure if rising volatile -charged magma is trapped beneath it, and this can sometimes lead to an explosive eruption.