| Mesoderus | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Family: | Dytiscidae |
| Subfamily: | † Liadytiscinae |
| Tribe: | † Mesoderini |
| Genus: | † Mesoderus Prokin & Ren, 2010 |
Mesoderus is an extinct genus of predaceous diving beetles in the family Dytiscidae. There are at least four described species in Mesoderus. [1] [2] [3] [4] [5]
These four species belong to the genus Mesoderus:
The Dytiscidae – based on the Greek dytikos (δυτικός), "able to dive" – are the predaceous diving beetles, a family of water beetles. They occur in virtually any freshwater habitat around the world, but a few species live among leaf litter. The adults of most are between 1 and 2.5 cm (0.4–1.0 in) long, though much variation is seen between species. The European Dytiscus latissimus and Brazilian Megadytes ducalis are the largest, reaching up to 4.5 cm (1.8 in) and 4.75 cm (1.9 in) respectively. In contrast, the smallest is likely the Australian Limbodessus atypicali of subterranean waters, which only is about 0.9 mm (0.035 in) long. Most are dark brown, blackish, or dark olive in color with golden highlights in some subfamilies. The larvae are commonly known as water tigers due to their voracious appetite. They have short, but sharp mandibles and immediately upon biting, they deliver digestive enzymes into prey to suck their liquefied remains. The family includes more than 4,000 described species in numerous genera.
The Ommatidae are a family of beetles in the suborder Archostemata. The Ommatidae are considered the extant beetle family that has most ancestral characteristics. Extant species of this group only occur in Australia and South America, but the geographical distribution was much wider during the Mesozoic spanning across modern day Europe, Siberia, Myanmar, and China. Discovery of Upper Jurassic Chinese and Upper Cretaceous Burmese amber fossils suggest that they were widespread on Pangea. So far, 13 extinct genera containing over 100 species of these beetles have been described. Three extant genera have been assigned to this family: Omma,Tetraphalerus and Beutelius. The family is considered to be a subfamily of Cupedidae by some authors.
Omma is a genus of beetles in the family Ommatidae. Omma is an example of a living fossil. The oldest species known, O. liassicum, lived during the final stage of the Triassic (Rhaetian), followed by several other species from Europe and Asia until after O. attenuatum from the Lower Cretaceous, the genus then reappears in the Burmese amber during the Cenomanian, then disappears from the fossil record for the remaining 100 million years until today, with one species endemic to Australia, three other extant species that were formerly part of this genus were moved to the separate genus Beutelius in 2020. The extant Omma stanleyi is strongly associated with wood, being found under Eucalyptus bark and exhibiting thanatosis when disturbed. Its larval stage and many other life details are unknown due to its rarity. Males are typically 14-20 mm in length, while females are 14.4-27.5 mm. Omma stanleyi occurs throughout eastern Australia from Victoria to Central Queensland.
This list of fossil arthropods described in 2012 is a list of new taxa of trilobites, fossil insects, crustaceans, arachnids and other fossil arthropods of every kind that have been described during the year 2012. The list only includes taxa at the level of genus or species.
This list of fossil arthropods described in 2013 is a list of new taxa of trilobites, fossil insects, crustaceans, arachnids and other fossil arthropods of every kind that have been described during the year 2013. The list only includes taxa at the level of genus or species.
This list of fossil arthropods described in 2014 is a list of new taxa of trilobites, fossil insects, crustaceans, arachnids and other fossil arthropods of every kind that have been described during the year 2014. The list only includes taxa at the level of genus or species.
Liadytiscinae is a subfamily of extinct predaceous diving beetles in the family Dytiscidae. There are about 5 genera and 10 described species in Liadytiscinae.
Amurodytes is a genus of predaceous diving beetles in the family Dytiscidae. There is one described species in Amurodytes, A. belovi, found in the Palearctic.
Sinoporus is an extinct genus of predaceous diving beetles in the family Dytiscidae. There is one described species in Sinoporus, S. lineatus.
Liadroporus is an extinct genus of predaceous diving beetles in the family Dytiscidae. There is one described species in Liadroporus, L. elegans.
Liadytiscus is an extinct genus of predaceous diving beetles in the family Dytiscidae. There are at least three described species in Liadytiscus.
Liadyxianus is an extinct genus of predaceous diving beetles in the family Dytiscidae. There is one described species in Liadyxianus, L. kirejtshuki.
Mesodytes is an extinct genus of predaceous diving beetles in the family Dytiscidae. There is one described species in Mesodytes, M. rhantoides.
This list of fossil insects described in 2018 is a list of new taxa that were described during the year 2018, as well as other significant discoveries and events related to insect paleontology that are scheduled to occur in the year 2018.
This list of fossil insects described in 2019 is a list of new taxa of fossil insects that are scheduled to be described during the year 2019, as well as other significant discoveries and events related to insect paleontology that are scheduled to occur in the year 2019.
This list of fossil insects described in 2017 is a list of new taxa that were described during the year 2017, as well as other significant discoveries and events related to insect paleontology that are scheduled to occur in the year 2017.
This list of fossil insects described in 2020 is a list of new taxa of fossil insects, that are scheduled to be described during the year 2020, as well as other significant discoveries and events related to insect paleontology that are scheduled to occur in the year 2020.
This list of fossil insects described in 20167 is a list of new taxa that were described during the year 2016, as well as other significant discoveries and events related to insect paleontology that are scheduled to occur in the year 2016.
This list of fossil insects described in 2015 is a list of new taxa that were described during the year 2015, as well as other significant discoveries and events related to insect paleontology that are scheduled to occur in the year 2015.
Burmese amber is fossil resin dating to the early Late Cretaceous Cenomanian age recovered from deposits in the Hukawng Valley of northern Myanmar. It is known for being one of the most diverse Cretaceous age amber paleobiotas, containing rich arthropod fossils, along with uncommon vertebrate fossils and even rare marine inclusions. A mostly complete list of all taxa described up until 2018 can be found in Ross 2018; its supplement Ross 2019b covers most of 2019.
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