Tropisternus lateralis

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Tropisternus lateralis
Tropisternus lateralis 6.png
Adult Tropisternus lateralis
Scientific classification
T. lateralis
Binomial name
Tropisternus lateralis
(Fabricius, 1775)

Tropisternus lateralis is a species of hydrophilid beetle that ranges across much of the Americas. [1]



T. lateralis larva Tropisternus lateralis larva.jpg
T. lateralis larva

Adult T. lateralis nimabatus, the subspecies found in the eastern United States, are distinguished by having uniformly dark elytra and pronotum with light-colored borders. [1]


The range of T. lateralis includes North America as far north as southern Canada, South America south to northern Chile and Argentina, the Caribbean, and the Galápagos Islands. [1] [2] T. lateralis humeralis has been accidentally introduced to Oahu. [3]


Five T. lateralis egg cases with individual eggs visible inside one of the egg cases Tropisternus lateralis egg cases.jpg
Five T. lateralis egg cases with individual eggs visible inside one of the egg cases

T. lateralis exhibits stridulation during stress, calling, and courtship. [4] Eggs are deposited in cases under water, and larvae are fully aquatic. While adults are primarily aquatic, they breathe air and can fly. [1] Adult T. lateralis avoid colonizing and laying egg cases in ponds that contain fish, which are potential predators of all life stages of the beetles. [5]


There are five recognized subspecies of Tropisternus lateralis. [6]

Related Research Articles

Beetle Order of insects

Beetles are a group of insects that form the order Coleoptera, in the superorder Endopterygota. Their front pair of wings are hardened into wing-cases, elytra, distinguishing them from most other insects. The Coleoptera, with about 400,000 species, is the largest of all orders, constituting almost 40% of described insects and 25% of all known animal life-forms; new species are discovered frequently. The largest of all families, the Curculionidae (weevils), with some 83,000 member species, belongs to this order. Found in almost every habitat except the sea and the polar regions, they interact with their ecosystems in several ways: beetles often feed on plants and fungi, break down animal and plant debris, and eat other invertebrates. Some species are serious agricultural pests, such as the Colorado potato beetle, while others such as Coccinellidae eat aphids, scale insects, thrips, and other plant-sucking insects that damage crops.


Spercheus is a genus of aquatic beetles which are placed in a family of their own, Spercheidae. About 20 species are known from around the world, with the majority being from the Oriental and Afrotropical Realms.

Water beetle

A water beetle is a generalized name for any beetle that is adapted to living in water at any point in its life cycle. Most water beetles can only live in fresh water, with a few marine species that live in the intertidal zone or littoral zone. There are approximately 2000 species of true water beetles native to lands throughout the world.

Tansy beetle Species of beetle

The tansy beetle is a species of leaf beetle. It measures 7.7–10.5 mm in length and has a characteristic bright metallic green colouration. The common name derives from the tansy plant on which they often feed as both larvae and adults. In addition to the nominotypical subspecies, which repeats the specific name, C. graminis graminis, there are five further distinct subspecies of tansy beetle, which, collectively, have a Palearctic distribution, although in the majority of countries where it is found the species is declining. In the United Kingdom it is designated as 'Nationally Rare' and this localised population, centred on York, North Yorkshire, has been the subject of much recent research.

Hydrophilidae Family of beetles

Hydrophilidae, also known colloquially as water scavenger beetles, is a family of chiefly aquatic beetles. Aquatic hydrophilids are notable for their long maxillary palps, which are longer than their antennae. Several of the former subfamilies of Hydrophilidae have recently been removed and elevated to family rank; Epimetopidae, Georissidae, Helophoridae, Hydrochidae, and Spercheidae. Some of these formerly-included groups are primarily terrestrial or semi-aquatic.

Cucujidae Family of beetles

The Cucujidae, "flat bark beetles," are a family of distinctively flat beetles found worldwide under the bark of dead trees. The family has received considerable taxonomic attention in recent years and now consists of 59 species distributed in four genera.

<i>Chrysolopus spectabilis</i> Species of beetle

Chrysolopus spectabilis is a species of weevil found in south-eastern Australia. It was discovered during James Cook's first voyage, and became the first insect to be described from Australia. The weevil measures up to 25 mm (1.0 in) long and includes distinctive metallic green and black scales. It is found only on 28 species of the plant genus Acacia.

<i>Cucujus</i> Genus of beetles

Cucujus is a genus of beetles in the family Cucujidae, the flat bark beetles. It contains 19 currently recognized species and subspecies.

<i>Helophorus</i> Genus of beetles

Helophorus ís the only genus in the beetle family Helophoridae. They are small insects, found mainly in the Holarctic region, but two or three species also live in the Afrotropical region, Central America and one in the Indomalayan region.

Hygrobia is a genus of aquatic beetles native to Europe, North Africa, China and Australia. It is the only genus in the family Hygrobiidae, also known as the Paelobiidae. These are known commonly as squeak beetles or screech-beetles.

<i>Trichostetha</i> Genus of beetles

Trichostetha is a genus of beetle in the scarab beetle family. It is endemic to southern Africa, and its species most commonly occur in mountainous terrain. The genus includes several species that have only recently been described, as well as many species lacking a description of any of the larval stages. Except for T. fascicularis and its subspecies, the species comprising Trichostetha have small ranges of distribution, frequently in the Cape Floral Region of South Africa.

<i>Tropisternus</i> Genus of beetles

Tropisternus is a genus of hydrophilid beetles with 63 species in five subgenera in North and South America.

Sphaeridiinae Subfamily of beetles

Sphaeridiinae is a subfamily of water scavenger beetles. Some species live in fresh water as both larvae and adults.

<i>Zygogramma suturalis</i> Species of beetle

Zygogramma suturalis, commonly known as the ragweed leaf beetle, is a species of leaf beetle belonging to the genus Zygogramma. Native to North America, it has been introduced into Russia and China for the biological pest control of ragweed.

<i>Tropisternus collaris</i> Species of beetle

Tropisternus collaris, the collared water scavenger beetle, is a species of water scavenger beetle in the family Hydrophilidae. It is found in the Caribbean, North America, and South America.

<i>Cercyon</i> (beetle) Genus of beetles

Cercyon is a genus of water scavenger beetles in the family Hydrophilidae. There are at least 50 described species in Cercyon.

<i>Tropisternus blatchleyi</i> Species of beetle

Tropisternus blatchleyi is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.

Tropisternus mixtus is a species of water scavenger beetle in the family Hydrophilidae. It is found in North America.

<i>Euphoria fulgida</i> Species of beetle

Euphoria fulgida, the emerald euphoria, is a species of scarab beetle in the family Scarabaeidae. It is found in North America.

Hydrophilus ensifer is a species of water scavenger beetle in the family Hydrophilidae found in the Americas. As of 2020, there are two valid subspecies of H. ensifer, H. e. ensifer and H. e. duvali, however the differences among the subspecies are not well understood.


  1. 1 2 3 4 Spangler, Paul J. (1960). A revision of the genus Tropisternus (Coleoptera:Hydrophilidae) (Ph.D.). University of Missouri.
  2. "Tropisternus lateralis". Charles Darwin Foundation. Retrieved July 17, 2015.
  3. Hansen, Michael (1995). "A review of the Hawaiian Hydrophilidae (Coleoptera)". Pacific Science. 49 (3): 266–288.
  4. Ryker, Lee C. (1976). "Acoustic behavior of Tropisternus ellipticus, T. columbianus, and T. lateralis limbalis in western Oregon (Coleoptera: Hydrophilidae)". The Coleopterists Bulletin. 30 (2): 147–156.
  5. Resetarits, Jr., William J. (2001). "Colonization under threat of predation: avoidance of fish by an aquatic beetle, Tropisternus lateralis (Coleoptera: Hydrophilidae)" (PDF). Oecologia. 129: 155–160. doi:10.1007/s004420100704. Archived from the original (PDF) on July 17, 2015.
  6. "Tropisternus lateralis (Fabricius, 1775)". ITIS. Retrieved July 17, 2015.