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Porcelain crabs have two or three larval stages, in which the rostrum and the posterior spine on the carapace are "enormously long". [1] Hermit crabs pass through around four larval stages. The post-larva is known as the glaucothoe, after a genus named by Henri Milne-Edwards in 1830. [1]
Powderpost beetle larvae spend months or years inside wood while developing, feeding mainly on the starch content. Their presence is only apparent when they emerge as adults, leaving behind pinhole-sized openings, often called "shot holes". [2]
Larval stage: From the eggs hatching till to when fin rays are present and the growth of protective scales has started (squamation). A key event is when the notochord associated with the tail fin on the ventral side of the spinal cord develops and becomes flexible.
The larvae of some organisms (for example, some newts) can become pubescent and do not develop further into the adult form. This is a type of neoteny. [5] It is a misunderstanding that the larval form always reflects the group's evolutionary history. This could be the case, but often the larval stage has evolved secondarily, as in insects.
The stages of such invertebrates are larvae or nymphs. In vertebrates and some invertebrates (e.g. spiders), larval forms (e.g. tadpoles) are usually considered a development stage of their own, and "juvenile" refers to a post-larval stage that is not fully grown and not sexually mature. In amniotes, the embryo represents the larval stage. Here ...
The larvae of the yellow tang can drift more than 100 miles and reseed in a distant location. [20] Fish larvae develop first an ability to swim up and down the water column for short distances. Later they develop an ability to swim horizontally for much longer distances. These swimming developments affect their dispersal. [21]
In larvae, the genu of the palp has two setae. In post-larval stages, there are complex dermal structures consisting of a gland paired with a sensory seta (glandularia), possibly for defense against predators. [4] The palps of post-larval water mites vary depending on their diet.
The larval stage of insect development is considered by some to be a form of altricial development, but it more accurately depicts, especially amongst eusocial animals, an independent phase of development, as the larvae of bees, ants, and many arachnids are completely physically different from their developed forms, and the pre-pupal stages of ...