# List of species named simplex

The species name simplex (Latin for "simple") occurs frequently in binomial names throughout the taxonomy of life. Examples include:

## Plants
### Monocots

* Amitostigma simplex, a species of plant in the family Orchidaceae
* Bulbophyllum simplex, a species of orchid in the genus Bulbophyllum
* Coelogyne simplex, a species of orchid
* Puccinellia simplex, a species of grass known by the common names western alkali grass and California alkali grass
* Oenocarpus simplex, a species of flowering plant in the family Arecaceae
* Vriesea simplex, a species of the genus Vriesea

### Eudicots

* Acacia simplex, perennial climbing tree native to islands in the western part of the Pacific Ocean
* Buddleja simplex, a small shrub, probably extinct, as no record of it has been made for nearly 200 years
* Brassaiopsis simplex, a species of plant in the family Araliaceae
* Echium simplex (Tower of jewels), herbaceous biennial plant up to 3 m in height on the island of Tenerife mainly in Macizo de Anaga
* Firmiana simplex, the Chinese parasol tree or wutong, an ornamental plant or tree of the cacao, or chocolate family Sterculiaceae of the order Malvales, native to Asia
* Gentianopsis simplex, a species of flowering plant in the gentian family known by the common name oneflower fringed gentian
* Gymnophragma simplex, a species of flowering plant belonging to the family Acanthaceae
* Pseudopanax simplex, a species of evergreen plant
* Stirlingia simplex, plant endemic to Western Australia
* Thalictrum simplex, a species of plant in the family Ranunculaceae
* Utricularia simplex, commonly known as bluecoats, is a very small perennial carnivorous plant that belongs to the genus Utricularia

## Fungi

* Acrodontium simplex, ascomycete fungus that is a plant pathogen
* Pleomeris simplex or Puccinia hordei, a plant pathogen

## Animals
### Cnidaria

* Nemiana simplex, the only species in Nemiana, a genus of simple, sessile organisms
* Protanthea simplex, a species of sea anemone found in deep water off the coasts of north west Europe
* Tubularia simplex, or oaten pipes hydroid, a species of hydroid native to the northeast Atlantic Ocean, North Sea, Norwegian Sea, and English Channel

### Molluscs
#### Bivalves

* Anomia simplex, or the common jingle shell, a species of bivalve mollusc in the family Anomiidae

#### Gastropods (snails and slugs)

* Arinia simplex, a species of small land snails with an operculum, terrestrial gastropod mollusks in the family Diplommatinidae
* Bittium simplex, a species of sea snail, a marine gastropod mollusk in the family Cerithiidae
* Blanfordia simplex, a species of land snail that has an operculum, a terrestrial gastropod mollusk in the family Pomatiopsidae
* Boucardicus simplex, a species of land snail with an operculum, a terrestrial gastropod mollusk in the family Cyclophoridae
* Calliostoma simplex, a species of sea snail, a marine gastropod mollusk in the family Calliostomatidae
* Cirsonella simplex, small sea snail, a marine gastropod mollusc in the family Turbinidae
* Cristilabrum simplex, a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Camaenidae
* Enatimene simplex, a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails
* Eulimella simplex, a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies
* Janoliva simplex, a species of sea snail, a marine gastropod mollusk in the family Olividae, the olives
* Mohnia simplex, a species of sea snail, a marine gastropod mollusk in the family Buccinidae, the true whelks
* Natica simplex, a species of predatory sea snail, a marine gastropod mollusk in the family Naticidae, the moon snails
* Obesotoma simplex, a species of sea snail, a marine gastropod mollusk in the family Mangeliidae
* Opisthostoma simplex, a species of small land snail with an operculum, a terrestrial gastropod mollusk in the family Diplommatinidae
* Pepta simplex, a species of sea snail, a marine gastropod mollusk in the family Cancellariidae, the nutmeg snails
* Pyrgulopsis simplex or fossil springsnail, a species of small freshwater spring snails, aquatic gastropod mollusks or micromollusks in the family Hydrobiidae
* Serrata simplex, a species of sea snail, a marine gastropod mollusk in the family Marginellidae, the margin snails
* Sukashitrochus simplex or Sukashitrochus morleti, a species of sea snail, a marine gastropod mollusk in the family Scissurellidae

### Arthropods
#### Arachnids

* Argiope simplex or Argiope trifasciata, also called banded garden spider in the USA, a species of spider found around the world
* Digamasellus simplex, mite in the family Digamasellidae
* Gamasellus simplex, in the genus of mites in the family Ologamasidae
* Halolaelaps simplex, family of mites in the order Mesostigmata

#### Crustaceans

* Acartia simplex, a species of marine copepod belonging to the family Acartiidae
* Asconiscus simplex, the only species in the genus Asconiscus, family of marine isopod crustaceans in the suborder Cymothoida
* Branchinella simplex, a species of crustacean in the family Thamnocephalidae
* Ovatis simplex, a species of crabs in the family Xanthidae, the only species in the genus Ovatis
* Paradiaptomus simplex, a species of copepod in the family Diaptomidae
* Tropodiaptomus simplex, copepod in the family Diaptomidae

#### Insects
##### Lepidoptera (butterflies and moths)

Moths of the family Noctuidae:
* Achaea simplex, a species of moth of the family Noctuidae
* Avatha simplex, a species of moth of the family Noctuidae
* Cyligramma simplex, moth of the family Noctuidae
* Penicillaria simplex, moth of the family Noctuidae
* Plusia simplex or Anagrapha falcifera, a moth of the family Noctuidae
* Schinia simplex, moth of the family Noctuidae
* Schrankia simplex or Schrankia altivolans, moth of the family Noctuidae
* Speiredonia simplex, a species of moth of the family Noctuidae
Other lepidopterans:
* Aloeides simplex, a butterfly of the family Lycaenidae
* Anatrachyntis simplex, moth in the family Cosmopterigidae
* Azygophleps simplex, moth in the family Cossidae
* Chilo simplex or Chilo suppressalis, moth of the family Crambidae
* Coleophora simplex, moth of the family Coleophoridae
* Endotricha simplex, a species of snout moths in the genus Endotricha
* Eriogaster simplex or Panacela lewinae is a moth of the family Eupterotidae
* Eulophota simplex, a species of snout moths in the genus Eulophota
* Hemistola simplex, moth of the family Geometridae
* Oroplema simplex, a species of moth of the family Uraniidae
* Proutiella simplex, moth of the family Notodontidae

##### Other insects

* Anabrus simplex or Mormon cricket, large insect that can grow to almost three inches in length
* Chlaenius simplex, a ground beetle in the large and diverse genus Chlaenius
* Holcobius simplex, beetle species in the family Anobiidae
* Mirosternus simplex, beetle species in the family Anobiidae
* Rhadinosticta simplex or Rhadinosticta, a species of damselfly in the family Isostictidae
* Rhamphomyia simplex, a species of dance fly, in the fly family Empididae
* Thesprotia simplex, common name grass mantis, is a species of praying mantis found in Brazil
* Urophora simplex, a species of tephritid or fruit flies in the genus Urophora of the family Tephritidae

### Chordates
#### Birds

* Anthreptes simplex or plain sunbird, a species of bird in the family Nectariniidae
* Calamonastes simplex or grey wren warbler, a species of bird in the family Cisticolidae
* Chlorocichla simplex or simple greenbul, a species of songbird in the family Pycnonotidae
* Columba simplex or lemon dove or cinnamon dove, a bird species in the pigeon family (Columbidae)
* Geoffroyus simplex, blue-collared parrot, simple parrot, lilac-collared song parrot, or lilac-collared Geoffroy's parrot, found in New Guinea
* Myrmothera simplex or tepui antpitta or brown-breasted antpitta, a species of bird in the family Formicariidae
* Pachycephala simplex or grey whistler, a species of bird in the family Pachycephalidae
* Passer simplex or desert sparrow, a bird of the sparrow family Passeridae
* Phaetusa simplex or large-billed tern, a species of tern in the family Sternidae
* Piculus simplex or Rufous-winged Woodpecker, a species of bird in the family Picidae
* Pogoniulus simplex or green tinkerbird, a species of bird in the family Lybiidae
* Pseudotriccus simplex or hazel-fronted pygmy tyrant, a species of bird in the family Tyrannidae
* Pycnonotus simplex or cream-vented bulbul, a species of songbird in the family Pycnonotidae
* Rhytipterna simplex or greyish mourner, a species of bird in the family Tyrannidae
* Sporophila simplex or drab seedeater, a species of bird in the family Thraupidae

#### Other vertebrates

* Betta simplex, a species of fish in the family Osphronemidae
* Hesperomys simplex, a species of rodent in the family Cricetidae from south-central South America
* Hyla simplex, a species of frog in the family Hylidae
* Melanophryniscus simplex, a species of toad in the family Bufonidae
* Sarcoglanis simplex, a species of catfish (order Siluriformes) of the family Trichomycteridae, and the only species of the genus Sarcoglanis