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Pelvic fin of a Java barb, a ray-finned fish The short fin spines on a coelacanth, a lobe-finned fish A lionfish, with venomous spines The stinger on a stingray's tail. Spines are found in the fins of most bony fishes, particularly actinopterygians (ray-finned fishes), who have folding fan-like fin made of spreading bony spines called lepidotrichia or "rays" covered by thin stretches of skin.
The number of vertebrae in a region can vary but overall the number remains the same. In a human spinal column, there are normally 33 vertebrae. [3] The upper 24 pre-sacral vertebrae are articulating and separated from each other by intervertebral discs, and the lower nine are fused in adults, five in the sacrum and four in the coccyx, or tailbone.
Dendritic spine, a small membranous protrusion from a neuron's dendrite; Thorns, spines, and prickles, needle-like structures in plants; Spine (zoology), needle-like structures in animals; SPINE (molecular biology) (strep–protein interaction experiment), a method for the detection of protein interactions
In plants, a rachis is the main axis of a compound structure.It can be the main stem of a compound leaf, such as in Acacia or ferns, or the main, flower-bearing portion of an inflorescence above a supporting peduncle.
Spine: A pointed, rigid structure on body and legs, usually with a basal joint; [31] spiders have a variety of hair-like structures of increasing size that are ...
Many mammalian species have developed keratinized penile spines along the glans and/or shaft, which may be involved in sexual selection.These spines have been described as being simple, single-pointed structures or complex with two or three points per spine (strepsirrhines). [1]
A spinous ventral process emerging from the haemal arch is referred to as the haemal spine. Blood vessels to and from the tail run through the arch. In reptiles, the caudofemoralis longus muscle, one of the main muscles involved in locomotion, attaches to the lateral sides of the haemal arches.
S. tetracanthus observed in Dunedin. White's original text (the type description) reads as follows: . Head and thorax deep black; elytra greenish bronze, the spines purplish black, the femora purplish black, the remainder of the legs purplish ferruginous; head and thorax quite smooth; elytra very deeply punctured in lines, the shoulders produced into a thick angular spine directed outwards and ...