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The Theraphosinae are a large subfamily of Mygalomorphae spiders in the family Theraphosidae found primarily in the Neotropical realm. Genera
All types of tarantulas have two sets of book lungs (breathing organs); the first pair is located in a cavity inside the lower front part of the abdomen near where the abdomen connects to the cephalothorax, and the second pair is slightly farther back on the abdomen. Air enters the cavity through a tiny slit on each side of and near the front ...
Spider book lungs (cross section) Spiders have developed several different respiratory anatomies, based either on book lungs or on tracheae. Mesothele and mygalomorph spiders have two pairs of book lungs filled with haemolymph, where openings on the ventral surface of the abdomen allow air to enter and oxygen to diffuse in and carbon dioxide to ...
The Noctuoidea also have tympana, but in their case, the tympana are located on the underside of the metathorax, the structure and position of which are unique and a taxonomic distinguishing feature of the superfamily. [21] [54] The females of some moths have a scent-emitting organ located at the tip of the abdomen. [6]
The morphology of the abdomen is substantially determined by morphoanatomic adaptation, in both sexes, as a function of the reproduction. In general, the 10 urites (one of the segments of the abdomen or post-abdomen) are reduced to a lower number of urites because of structural modifications of the first urite and the last.
The ground plan of the abdomen of an adult insect typically consists of 11–12 segments and is less strongly sclerotized than the head or thorax. Each segment of the abdomen is represented by a sclerotized tergum, sternum, and perhaps a pleurite. Terga are separated from each other and from the adjacent sterna or pleura by a membrane.
When it detects a female, the two spiders then exchange different signals (usually a rhythmic drumming of the legs) to assure that they are the same species. If the female is willing to mate, the male will approach her, lift her upper body up, and then inserts his pedipalps into the female reproductive organ, which is located on the lower abdomen.
It is an opening in the right side of the mantle of a stylommatophoran snail or slug. Air enters through the pneumostome into the animal's single lung , the air-filled mantle cavity. [ 1 ] Inside the mantle cavity the animal has a highly vascularized area of tissue that functions as a lung.