| Sagrinae | |
|---|---|
 | |
| Sagra buqueti | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Arthropoda |
| Class: | Insecta |
| Order: | Coleoptera |
| Family: | Chrysomelidae |
| Subfamily: | Sagrinae Leach, 1815 |
| Tribes [1] | |
The Sagrinae are a subfamily of the leaf beetles, or Chrysomelidae.
Beetles of this subfamily are also known as "frog-legged beetles" or "kangaroo beetles". They are very distinctive due to their metafemora, or third pair of legs, which are distinctly larger than other femora and generally sport some type of ridge or tooth on the ventral side. It is theorized that the evolutionary function of the large metafemora is to hold the beetle on vegetation for feeding.
These beetles grow to be 1-2 inches in length, and display sexual dimorphism, with the males of the subfamilies being almost twice the size of the females. Males also have significantly larger metafemora than females.
Other identifying features include deep sutural stria, a prognathous head without a median sulcus and with cruciform grooves, a narrow pronotum, and commonly deeply indented eyes. They also have functional wings that aren't used often.
Most beetles of the subfamily display bright colors. [2]
This subfamily is found in Asia and has been observed in Malaysia, Java, Sumatra, Borneo, and the Philippines. It prefers dense tropical jungles for its habitat. [2] There is fossil evidence that suggests these beetles lived in North America and Europe millions of years ago. [3]
There is not much known about reproduction and development in this subfamily, however species in the subfamily often sport large cocoons in the post-larval stage which are commonly found on vining plants.
The cocoons represent a phylogenetic relationship with a type of bacteria called Enterobacteriaceae because the bacteria play a role in the construction of the cocoons. This bacterium also functions as an intracellular symbiont with this subfamily of beetle, and lives in four large blind sacs at the larval foregut. The bacteria provide much needed nutrients throughout the beetle's life cycle. [4]
The insects of the beetle family Chrysomelidae are commonly known as leaf beetles, and include over 37,000 species in more than 2,500 genera, making up one of the largest and most commonly encountered of all beetle families. Numerous subfamilies are recognized, but the precise taxonomy and systematics are likely to change with ongoing research.
The bean weevils or seed beetles are a subfamily (Bruchinae) of beetles, now placed in the family Chrysomelidae, though they have historically been treated as a separate family. They are granivores, and typically infest various kinds of seeds or beans, living most of their lives inside a single seed. The subfamily includes about 1,650 species and are found worldwide.
Dynastinae or rhinoceros beetles are a subfamily of the scarab beetle family (Scarabaeidae). Other common names – some for particular groups of rhinoceros beetles – include Hercules beetles, unicorn beetles or horn beetles. Over 1500 species and 225 genera of rhinoceros beetles are known.
Staphylinoidea is a superfamily of beetles. It is a very large and diverse group with worldwide distribution.
The Fulcidacini, sometimes known as the warty leaf beetles, are a tribe within the leaf beetle subfamily Cryptocephalinae, though historically they were often treated as a distinct subfamily, Chlamisinae. 11 genera with altogether about 400 species are currently placed here; some four-fifths of the species are found in the Neotropics, but the rest is distributed over all other continents except Antarctica.
The Lamprosomatinae are a small subfamily of leaf beetles (Chrysomelidae). They belong to the case-bearing Camptosomata.
The Orsodacnidae are a small family of leaf beetles, previously included as a subfamily within the Chrysomelidae. It is the smallest of the Chrysomeloid families in North America; Oxypeltidae is smaller, with only three species in South America. A fossil species of Aulacoscelis is known from the Early Cretaceous (Aptian-Albian) Santana Group of Brazil.
The Bostrichidae are a family of beetles with more than 700 described species. They are commonly called auger beetles, false powderpost beetles, or horned powderpost beetles. The head of most auger beetles cannot be seen from above, as it is downwardly directed and hidden by the thorax. Exceptions are the powderpost beetles, and members of the subfamily Psoinae.
Eulichadidae is a family of beetles belonging to Elateriformia. There are two extant genera, Eulichas with several dozen species native to the Indomalayan realm of Asia, and Stenocolus, with a single species native to Western North America. The larvae are aquatic, with the larvae of Eulichas being found in sandy sediments of clean forest streams, while the larvae of Stenocolus are found under rocks and in leaf packs in low elevation streams and rivers. They are herbivious/saprophagous with larval specimens of Eulichas having been found with wood particles in their stomachs, while the larvae of Stenocolus are known to feed on decaying roots and detritus. The adults are terrestrial, with specimens of Eulichas typically found using light, while specimens of Stenocolus are typically found in riparian vegetation, and are not attracted to light. Potential extinct genera have been described from Mesozoic rocks, but the placement of several of these taxa in the family is disputed.
Aoriopsis is an extinct genus of leaf beetles in the subfamily Eumolpinae. It contains only one species, Aoriopsis eocenicus, and is known only from lowermost Eocene amber collected from Le Quesnoy, Oise Department, France.
Taphioporus is an extinct genus of leaf beetles in the subfamily Eumolpinae. It is known from Baltic and Rovno amber from the upper Eocene.
Eumolpini is a tribe of leaf beetles in the subfamily Eumolpinae. It is the largest tribe in the subfamily, with approximately 170 genera found worldwide. Members of the tribe almost always have a longitudinal median groove on the pygidium, which possibly helps to keep the elytra locked at rest. They also generally have a subglabrous body, as well as appendiculate pretarsal claws.
2019 in paleoentomology is a list of new fossil insect taxa that were described during the year 2019, as well as other significant discoveries and events related to paleoentomology that were scheduled to occur during the year.
Euryopini is a tribe of leaf beetles in the subfamily Eumolpinae.
Bromiini is a tribe of leaf beetles in the subfamily Eumolpinae. The tribe contains approximately 120 genera, which are found worldwide. They are generally thought to be an artificial group, often with a subcylindrical prothorax without lateral ridges and covered with setae or scales.
2015 in paleoentomology is a list of new fossil insect taxa that were described during the year 2016, as well as other significant discoveries and events related to paleoentomology that were scheduled to occur during the year.
2015 in paleoentomology is a list of new fossil insect taxa that were described during the year 2015, as well as other significant discoveries and events related to paleoentomology that were scheduled to occur during the year.
This paleoentomology list records new fossil insect taxa that were to be described during the year 2021, as well as notes other significant paleoentomology discoveries and events which occurred during that year.
Rhaebus is a genus of metallic bean weevils in the subfamily Bruchinae, and the only member of the tribe Rhaebini. It is restricted to the Palearctic region.
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