Did you know that the heaviest terrestrial arthropod that we can find in nature is a crustacean? We are talking about the coconut crab (Birgus latro), a species of hermit crab capable of opening with its strong claw-shaped appendages the coconuts of the areas of the Indian Ocean and western Pacific in which it inhabits. It is one of the most striking species within the more than 26,000 species of crustaceans that have been discovered and classified to date. Undoubtedly, the heterogeneous group of crustaceans never ceases to surprise those who know their peculiar characteristics and variety of types.
In this Green Ecologist article we provide detailed information about the crustaceans: what are they, types, characteristics and examples.
Crustaceans belong to the diverse group of arthropods, thus characterized by having a segmented body and by having numerous articulated appendages. In general, marine crustaceans are the most abundant, although there are also some species of freshwater crustaceans or freshwater, as well as terrestrial, although they do not come to present any type of special adaptation to this environment.
Crustacean animals are also one of the most characteristic groups within the shell animals, the shell of crustaceans being calcareous. It covers the head and part of the trunk, providing protection and it is common for them to carry out the molting process during the development and growth stages. In some species of crustaceans, this shell is bivalve, it protects the entire body of the organism and is called a shell.
In this other Green Ecologist article you can meet +20 animals with shells.
The crustacean classification (including both marine, freshwater and terrestrial crustaceans), is based on the grouping of this great diversity of crustaceans into 6 fundamental types or classes:
The main characteristics of crustacean animals are as follows:
There are so much dioecious crustaceans (with individuals of the male gender and female individuals), as well as hermaphroditic crustaceansIn other words, the same individual has male and female reproductive organs at the same time. Here you can learn everything about Hermaphrodite Animals: reproduction and examples.
Frequently, male individuals have specialized thoracic appendages for grasping females during fertilization, which is always external. Later, the development of the new individuals undergoes a process of metamorphosis, going through several stages, from nauplius-type larvae to becoming adults.
The best known crustaceans are usually those that we are used to seeing and consuming in markets and shops. For this reason, from the Fund for the Regulation and Organization of the Market of Fishing Products and Marine Cultures (FROM), in Spain they commonly differentiate between short-bodied crustaceans and long-bodied crustaceans. These are some examples of crustacean names:
In these images you can see the different crustacean species in the order of these lists.
If you want to read more articles similar to Crustaceans: what are they, types, characteristics and examples, we recommend that you enter our Biodiversity category.
Bibliography