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Classification of organisms that do not fit in other classifications
Wastebasket taxon (also called a waste-bin taxon, dustbin taxon or catch-all taxon) is a term used by some taxonomists to refer to a taxon that has the
Wastebasket_taxon
Unit of biological populations
(botany) Rank (zoology) Segregate (taxonomy) Virus classification Wastebasket taxon This is not considered as mandatory, however, as indicated by terms
Taxon
Studies of an extinct aquatic reptile
was described via unclear diagnosis, leading the genus to become a wastebasket taxon containing up to fifty different species. A new description of the
Research history of Mosasaurus
Research_history_of_Mosasaurus
Prehistoric cetacean genus from the Late Eocene epoch
preserved in the skull of Dorudon. Basilosaurus was at one point a wastebasket taxon before the genus slowly started being reevaluated, with many species
Basilosaurus
Genus of arthropods (fossil)
have prompted some researchers to designate Adelophthalmus as a "wastebasket taxon" with poorly known internal relationships and phylogeny. The genus
Adelophthalmus
Unusually long straight shell of a nautiloid cephalopod
discovered were given the "catch-all" name Orthoceras, thus creating a wastebasket taxon. However, it is now known that many species, genera and families of
Orthocone
Genus of amphibians
Litoria is a genus of Pelodryadid treefrogs, which was historically a wastebasket taxon for the most or all of the family, until a 2025 phylogenetic study
Litoria
Domain of life whose cells have nuclei
amoebae, flagellates and ciliates; however, this is now considered a wastebasket taxon and has been replaced with newer classifications that better represent
Eukaryote
Genus of extinct jawless fish
on characters that are common to many osteostracans, making it a wastebasket taxon. Recent efforts The holotype specimen of Cephalaspis lyelli would
Cephalaspis
Genus of theropod dinosaurs
fragmentary skull, and claimed that N. lancensis has been treated as a wastebasket taxon that likely comprises fossils of multiple taxa. In October 2025, the
Nanotyrannus
Extinct genus of molluscs
thought to have had a worldwide distribution due to the genus' use as a wastebasket taxon for numerous species of conical-shelled (orthocone) nautiloids throughout
Orthoceras
Extinct genus of proboscideans
erected with undisputed taxonomic authority. The genus served as a wastebasket taxon for proboscidean species with superficially similar molar teeth morphologies
Mastodon
Genus of fishes
fish in the cichlid family. The genus was previously very large (a wastebasket taxon), including cichlids from North America, including Central America
Cichlasoma
Genus of fungi
circumscribed in 1963 by Polish mycologist Stanislaw Domanski. The genus is a wastebasket taxon, containing "species that share common macroscopic and microscopic
Ceriporiopsis
Term to indicate an uncertain taxonomic position
that in the opinion of the taxonomist requires further investigation Wastebasket taxon Sui generis (biology) Unclassified language "Plumalina plumaria".
Incertae_sedis
Extinct family of mammals
dental traits of both the Tragulina and Pecora, making it a notorious wastebasket taxon with unresolved affinities. Members of the family Gelocidae were long-legged
Gelocidae
Classification of organisms based on their morphology
Glossary of scientific naming Folk taxonomy Phenetics Taphonomy Wastebasket taxon Bengtson, S. (1985). "Taxonomy of Disarticulated Fossils". Journal
Form_classification
Genus of flowering plants
growing to a height of 60–90 cm (24–35 inches). The genus was a wastebasket taxon, and many of its members have been reclassified in smaller genera
Helichrysum
Container to temporarily store waste
A waste container, known as a trash can, garbage can, or wastebasket (most commonly in the Americas); or known as a rubbish bin or dustbin (usually in
Waste_container
Grouping of extinct mammals
Paleocene and Eocene epochs. It is now largely considered to be a wastebasket taxon, having served as a dumping ground for classifying ungulates which
Condylarthra
Extinct genus of fishes
were also formerly placed in the genus, due to it being a former wastebasket taxon. It was among the last surviving members of the formerly-diverse order
Diplomystus
Tribe of true bugs
worldwide distribution; however it has also been described as a "wastebasket taxon" for numerous genera, many of which might be placed in other tribes
Halyini
Subkingdom of worm-like parasites of marine invertebrates
protistans, not animals. In the 19th century, the Mesozoa were a wastebasket taxon for multicellular organisms which lacked the invaginating gastrula
Mesozoa
Extinct genus of marine lizard from the Late Cretaceous
ambiguity in how the genus is defined. This led Mosasaurus to become a wastebasket taxon containing as many as fifty different species. A 2017 study by Hallie
Mosasaurus
Extinct genus of reptiles
species, T. geoffroyi may also exist. It was previously considered a wastebasket taxon, with many other remains assigned to the genus. Teleosaur remains
Teleosaurus
Ape described in medieval bestiaries
Linnaeus' Systema Naturae, alongside other legendary creatures, under the wastebasket taxon of Animalia Paradoxa. In translation, Linnaeus is quoted as saying
Satyrus_(ape)
Extinct genus of reptiles
ichthyosaur from the Cretaceous period. It was historically used as a wastebasket taxon, and most species within Platypterygius likely are undiagnostic at
Platypterygius
Genus of ornithopod dinosaurs
distinct family. This family traditionally has been something of a wastebasket taxon, including ornithopods that were neither hypsilophodontids or hadrosaurids
Iguanodon
Genus of pterodactyloid pterosaur from the Late Jurassic
pterosaur species would be named Pterodactylus, which thus became a "wastebasket taxon". Even after clearly different forms had later been given their own
Pterodactylus
Extinct genus of worms
Palaeoscolex is the type genus of the Palaeoscolecid worms, and served as a wastebasket taxon. until its taxonomy was revised and many of its taxa assigned to Wronascolex
Palaeoscolex
Genus of extinct fishes
not pertain to Dunkleosteus. Dunkleosteus as currently defined is a wastebasket taxon for large dunkleosteoid arthrodires that are more evolutionarily derived
Dunkleosteus
Extinct genus of reptiles
archosauriform from the Erfurt Formation in southern Germany. It was once a wastebasket taxon until a taxonomic revision by Schoch (2011) left only the paratype
Zanclodon
Genus of fishes
After their nature as eel larvae became known, it was recognized as a wastebasket taxon; the genus is not used in present classification systems. Due to being
Leptocephalus_(genus)
Family of molluscs
Dycheiidae is a wastebasket taxon containing problematic polyplacophora from Upper Cambrian strata in the USA. Pojeta, J. Jr.; Vendrasco, M. J.; Darrough
Dycheiidae
Extinct order of insects
Protorthoptera are an extinct order of Palaeozoic insects, and represent a wastebasket taxon and paraphyletic assemblage of basal neoptera[citation needed]. They
Protorthoptera
Extinct genus of fishes
all fish fossils. The genus is considered to be a poorly defined wastebasket taxon. Palaeoniscum had a torpedo-shaped body 30 cm (12 in) in length, with
Palaeoniscum
Studies of an extinct genus of proboscidean
Georges Cuvier. "Mastodon" for its taxonomic history served as a wastebasket taxon for any fossil proboscidean species whose dentitions appeared closer
Research_history_of_Mammut
Family of birds
Old World babbler family Timaliidae. This family was a notorious wastebasket taxon into which Old World insectivores were placed when they could not
Laughingthrush
Birds of the order Charadriiformes
in a single suborder Charadrii, but this has turned out to be a "wastebasket taxon", uniting no fewer than four charadriiform lineages in a paraphyletic
Wader
Extinct genus of cartilaginous fishes
spanning a large period of time, and it is currently considered a wastebasket taxon that is 'broadly polyphyletic' and requires reexamination. It has
Hybodus
Genus of theropod dinosaur from the Early Jurassic
differences between them. At the time, Megalosaurus was used as a "wastebasket taxon", wherein many species of theropods were placed, regardless of their
Dilophosaurus
Genus of extinct, giant cephalopods
the prey's shell. Cameroceras has historically been utilized as a "wastebasket taxon" in which species of large orthoconic endocerids such as Endoceras
Cameroceras
Family of mammals
family of large herbivorous mammals traditionally placed in the "wastebasket taxon" Condylarthra, which may instead represent early-stage perissodactyls
Phenacodontidae
Extinct genus of reptiles
Oxfordian) of France and possibly also India. The genus has been used as a wastebasket taxon for thalattosuchian fossils for over two centuries, and almost all
Steneosaurus
Species of reptile
referred to the Rhynchocephalia, resulting in what taxonomists call a "wastebasket taxon". Williston in 1925 proposed the Sphenodontia to include only tuatara
Tuatara
Extinct genus of hornless rhinocerotoids from Eurasia
rhinoceros genus Aceratherium; A. bugtiense. Aceratherium was by then a wastebasket taxon; it included several unrelated species of hornless rhinoceros, many
Paraceratherium
Species of frog
described in 1997 and placed in genus Colostethus, which was that time a "wastebasket taxon" uniting various unrelated lineages of non-aposematic drab-coloured
"Colostethus"_ruthveni
Genus of birds
the genus Strix has been misapplied by many early scientists as a "wastebasket taxon" for many owls, including Tyto. Tyto antiqua (Late Eocene/Early Oligocene
Tyto
Genus of mushrooms
and – even more so – Psalliota were historically often used as a "wastebasket taxon" for any and all similar mushrooms, regardless of their actual relationships
Agaricus
Extinct genus of rays
rays in the family Asterodermidae. It is possible this genus is a wastebasket taxon. It is known from many sites of both Jurassic and Cretaceous age throughout
Belemnobatis
Extinct subfamily of rhinoceroses
borne small horns. The subfamily had historically been used as a wastebasket taxon for all hornless rhinocerotids, though it is now recognised that there
Aceratheriinae
Genus of woodlice
in Nesodillo at some point. In recent years Cubaris has become a wastebasket taxon, resulting in many species being placed in the genus even when they
Cubaris
Family of snakes
elapids, than to each other. This family was historically used as a "wastebasket taxon" for snakes that did not fit elsewhere. That is, until recently, colubrids
Colubridae
Genus of Jurassic-aged theropod dinosaur
large carnivorous dinosaur. As a result, it began to function as a "wastebasket taxon", and many large or small carnivorous dinosaurs from Europe and elsewhere
Megalosaurus
Palaeozoic lophophorates with small conical shells
the simple shape of their shell, hyoliths have been something of a wastebasket taxon, and organisms originally interpreted as hyoliths have sometimes later
Hyolitha
Extinct genus of cartilaginous fish
the subclass Holocephali. This makes Helodus as broadly defined a wastebasket taxon, and only the type species can be confidently attributed to this genus
Helodus
Genus of pterosaur of the Late Cretaceous
plethora of species and a great deal of confusion. The name became a wastebasket taxon, rather like the dinosaur Megalosaurus, to label any pterosaur remains
Pteranodon
Genus of bacteria
engineering. Leading up to the 1990s, the genus Agrobacterium was used as a wastebasket taxon. With the advent of 16S sequencing, many Agrobacterium species (especially
Agrobacterium
Clade of reptiles
ancestors of all later archosaurs. The name Pseudosuchia became a wastebasket taxon into which all thecodonts that did not fit in the other three suborders
Pseudosuchia
Order of hoofed mammals
traditionally classified as condylarths, long-understood to be a wastebasket taxon, such as hyopsodontids and phenacodontids, are now understood to be
Perissodactyla
Vernacular, as opposed to scientific, naming system
organisms Prototype theory – Theory of categorization in psychology Wastebasket taxon – Classification of organisms that do not fit in other classifications
Folk_taxonomy
Order of reptiles
added to the Rhynchocephalia, resulting in what taxonomists call a "wastebasket taxon". These include the superficially similar (both in shape and name)
Rhynchocephalia
Genus of lizards
many Old World species were placed here, as Mabuya was a kind of "wastebasket taxon". These Old World species are now placed in the genera Chioninia,
Mabuya
Genus of flowering plants
traditionally circumscribed, the genus was not monophyletic. It had become a "wastebasket taxon"; almost all species with a flower apparently similar to those of
Polygala
Species of fungus
when moistened. Formerly grouped in the family Tricholomataceae, a wastebasket taxon of gilled mushrooms with white spores, P. stipticus is now classified
Panellus_stipticus
Extinct family of dinosaurs
dinosaur, Megalosaurus saharicus, though then Megalosaurus was a wastebasket taxon. It was the first theropod described from North Africa and the first
Carcharodontosauridae
Order of reptiles (fossil)
majority of the new species were placed in it so that it became a wastebasket taxon. Gradually, other genera were named. Hawkins had already created new
Plesiosaur
Extinct species of prehistoric freshwaer softshell turtle
softshell turtle species that is tentatively classified to the former wastebasket taxon genus Trionyx. It was initially described as Aspideretes singularis
"Trionyx"_singularis
Extinct genus of fishes
earliest Permian of freshwater ecosystems of Europe, but as a former wastebasket taxon, it contains many more dubiously-classified species from the Carboniferous
Elonichthys
Extinct genus of reptiles
from innermost to outer "toe". Plesiosaurus has historically been a wastebasket taxon. This is due in part to few anatomical or taxonomic studies of the
Plesiosaurus
Extinct species of mammal
suggested that as currently recognised, the species is effectively a wastebasket taxon. The species is primarily known from dental remains. A 2016 study
Mammuthus_subplanifrons
Extinct genus of mammals
revised during the late 19th and early 20th centuries, it became a wastebasket taxon for other hyaenodont species found in Africa and Asia. Today, only
Pterodon_(mammal)
Genus of carnivores
history of the genus is unclear, and it has formerly been used as wastebasket taxon for a number of fossils of uncertain affinity. Currently there are
Phoca
Genus of gastropods
family Mangeliidae. The genus has been used for a long time as a wastebasket taxon. There have been many described species, many of which have become
Mangelia
Genus of bacteria
nonhemolytic. They possess no Lancefield antigens. The "viridans" group is a wastebasket taxon. It includes representatives of all six traditional 16S groups of
Streptococcus
Dental structure found in some mammals
their clade name is not. The term "strepsirrhine" has been used as a wastebasket taxon for non-haplorhine primates, most of whom do not exhibit the characteristic
Toothcomb
Extinct genus of fishes
pycnodont fish from the Jurassic. This genus is currently treated as a wastebasket taxon, with several genera such as Macromesodon and Turbomesodon being split
Gyronchus
Genus of fishes (fossil)
of marine Mesozoic ray-finned fish. It has long been considered a wastebasket taxon, characterised by "general features, such as thick rhomboid scales
Lepidotes
Swedish biologist and physician (1707–1778)
foundations for scientific racism. Additionally, Linnaeus created a wastebasket taxon "monstrosus" for "wild and monstrous humans, unknown groups, and more
Carl_Linnaeus
Genus of legumes
unclear just how many. One estimate stands at 692. The genus was a wastebasket taxon for a long time, used to classify plants that did not fit well anywhere
Cassia_(genus)
Species of shrub endemic to New South Wales, Australia
handsome', hence 'very-' or 'most beautiful'. Embothrium had been a wastebasket taxon at the time, and Robert Brown suggested the genus Telopea for it in
Telopea_speciosissima
Extinct family of mammals
most common genus is Hyopsodus. Condylarthra is now thought to be a wastebasket taxon, and Hyopsodontidae (in its broadest form) may be as well. Some hyopsodontids
Hyopsodontidae
and – even more so – Psalliota were historically often used as a "wastebasket taxon" for any and all similar mushrooms, regardless of their actual relationships
List_of_Agaricus_species
Extinct clade of theropod dinosaurs
Ornithomimidae was originally classified as a group of "megalosaurs" (a "wastebasket taxon" containing any medium to large sized theropod dinosaurs), but as
Ornithomimosauria
Extinct genus of fishes
extinct genus of ray-finned fish from the Eocene period. It is a wastebasket taxon, although many fossils from the Jurassic or Cretaceous are assigned
Pycnodus
Genus of carcharodontosaurid dinosaur from the Cretaceous period
Moreover, the genus Megalosaurus is known to have historically been a wastebasket taxon that included several species assigned without justification, the
Carcharodontosaurus
Genus of carcharodontosaurid dinosaur from the Early Cretaceous
the Allosauridae, but it was transferred to the Megalosauridae, a wastebasket taxon, by Alfred Sherwood Romer in 1956. To other authors, the long spines
Acrocanthosaurus
Ceratosaurian theropod dinosaur genus from the Late Jurassic Period
by Janensch as a coelurosaurian. At the time, Coelurosauria was a wastebasket taxon for small theropods. Then, Elaphrosaurus was placed in the family
Elaphrosaurus
Obsolete taxon of mammals
Pantotheria is an abandoned taxon of Mesozoic mammals. This group is now considered an informal "wastebasket" taxon and has been replaced by Dryolestida
Pantotheria
Extinct genus of dinosaurs
As the type genus of Titanosauria, Titanosaurus at times became a wastebasket taxon for a number of titanosaurs, including those not just from India but
Titanosaurus
Genus of spiders
many undescribed species, the genus appears to be a catchall or "wastebasket taxon" for several unrelated species that may represent several genera.
Melpomene_(spider)
Indo-European language
linguist Wilhelm Braune (1850–1926), who used the term Franconian as a wastebasket taxon for the early West Germanic texts that he could not readily classify
Old_Dutch
Permian biozone in South Africa
Eunotosaurus Subzone A scylacosaurid scylacosaurian; something of a wastebasket taxon due to the fragmentary nature of its holotype and the poorly-supported
Endothiodon_Assemblage_Zone
Geologic formation in India
Indeterminate. "Fragmentary remains" Carnosauria was often used as a wastebasket taxon. ?Camarasauridae Indeterminate. Vertebrae. Camarasaurids are not known
Kallamedu_Formation
Extinct genus of fishes
is uncertain, and this genus likely represents a non-monophyletic wastebasket taxon. A potential diagnostic trait is a prearticular tooth row with three
Coelodus
Extinct family of fish
originally assigned to the genus Lepidotes which was long considered a wastebasket taxon. Cladistic analysis has indicated that they are close relatives of
Lepidotidae
Fossils found in deposits in and around Elgin, Scotland
assigned to the wastebasket taxon Dicynodon as Dicynodon traquairi. Re-study of the specimen using CT-scanning has allowed this taxon to be more formally
Elgin_Reptiles
Extinct family of turtles
declaring them descendants of early turtles and placing them in the wastebasket taxon Amphichelydia. During the 1970s Amphichelydia fell out of use, with
Meiolaniidae
Genus of flowering plants
name from the writings of Theophrastus. Sida has historically been a wastebasket taxon, including many plants that simply did not fit into other genera of
Sida_(plant)
Group of cartilaginous fish
Paraselachimorpha is now regarded as either paraphyletic or a non-diagnostic wastebasket taxon, including by Lund himself, and the taxa which formerly made up Paraselachimorpha
Holocephali
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WASTEBASKET TAXON
WASTEBASKET TAXON
WASTEBASKET TAXON
WASTEBASKET TAXON
WASTEBASKET TAXON
WASTEBASKET TAXON
WASTEBASKET TAXON
WASTEBASKET TAXON
WASTEBASKET TAXON
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