Archaeocalamites radiatus
Archaeocalamites radiatus First described by A. Brongniart in 1828, this species is one of the earliest recorded equisetaleans or ‘horse-tails’, a group of plants noted for the jointed nature of the stem. At each joint there is a ring of short branches. See SPHENOPSIDA.
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Joint , joint / joint/ • n. 1. a point at which parts of an artificial structure are joined. ∎ Geol. a break or fracture in a mass of rock, with no relative… Plants and Animals , coxa Uppermost joint of the leg of an insect, which articulates with the thorax proximally, and with the trochanter distally. The coxa is usually a s… Joint (geology) , joint
1. A discrete brittle fracture in a rock along which there has been little or no movement parallel to the plane of fracture, but slight movemen… Double-jointed , double-jointed Some individuals are referred to as being ‘double-joined’. In reality these individuals do not have ‘double’ joints, but have a greate… Ball-and-socket Joint , Skip to main content
ball-and-socket joint
ball-and-socket joint
ball-and-socket joint, in engineering, mechanical connection used between parts that… Calamites Cistiiformes , Calamites cistiiformes Jointed-stemmed calamitids were an important component of Carboniferous swampland floras. The generic name Calamites was first…
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Archaeocalamites radiatus