The larvae are herbivorous free-living eruciforms, with three pairs of true legs, prolegs ( on every segment, unlike Lepidoptera ) and ocelli.

In some species, there are simple light-sensitive ocelli associated with the brain.

The rhabdomeric eyes of the Onychophora are thought to be homologous with the median ocelli of arthropods ; this would imply that the last common ancestor of arthropods bore only median ocelli.

Note ocelli — the white spots on the back of the ears — are used to communicate with other leopards.

However while these larvae superficially resemble caterpillars, they can be distinguished by the presence of prolegs on every abdominal segment, an absence of crochets or hooks on the prolegs ( these are present on lepidopteran caterpillars ), prominent ocelli on the head capsule, and an absence of the upside-down Y-shaped suture on the front of the head.

The wild-caught forms of the species are typically darkly coloured with orange-ringed spots or ocelli on the caudal peduncle and on the dorsal fin.

Centipedes possess a variable number of ocelli, which are sometimes clustered together to form true compound eyes.

In some cases, however, they are modified to form ocelli, with a cluster of individual photoreceptor cells lying beneath a small lens, in some cases made up of aragonite.

There is a relatively good fossil record of chiton shells, but ocelli are only present in those dating to or younger ; this would make the ocelli, whose precise function is unclear, the most recent eyes to evolve.

There are also single white spots, called ocelli, on the backs of the ears.

The backs of the ears are black with bold ocelli.

Whereas some other jellyfish do have simple pigment-cup ocelli, box jellyfish are unique in the possession of true eyes, complete with retinas, corneas and lenses.

All phasmids possess compound eyes, but ocelli are only found in some winged males.

Leafcutter ants have two kinds of eyes: the 1 ) compound, lateral eyes, two in number and placed on the sides of the head, and the 2 ) simple, median eyes, ocelli, or stemmata, of which there are three on the vertex.

Mostly these are simple sensory nerve endings, but they also include statocysts and primitive light-sensitive ocelli.

In some species, such as M. godarti, the dorsal lamellae are so thin as to allow the ventral ocelli to peek through.

Only a few aquatic oligochaetes have eyes, and even then they are only simply ocelli.

The blunt, triangular head has two ocelli ( eyespots ), pigmented areas that are sensitive to light.

They look like simple eyes or ocelli, but they are in fact surprisingly sophisticated.

These eyes are remarkable in their internal anatomy ; there is a suggestion that they represent the last step in the integration of the aggregate of simple ocelli into a compound eye, and of further integration of a compound eye into a simple eye.

In the male this extends up to two meters decorated with eyespots or ocelli while in the female the coverts are green and much shorter just covering the tail.

Specialized structures to sense light ( ocelli ) and perceive gravity ( statoliths ) are usually present.

Flies have a mobile head with eyes and in most cases have large compound eyes on the sides of the head, with three small ocelli on the top.

Formicines retain some primitive features such as the presence of cocoons around pupae, the presence of ocelli in workers, and little tendency toward reduction of palp or antennal segmentation in most species, except subterranean groups.

file: Morpho_didius_Male_Ventre_MHNT. jpg | Morpho didius – Ventral side – Museum specimen Predatory birds aim attack at the most prominent feature, the ocelli, missing the body entirely.

Most turbellarians have pigment-cup ocelli (" little eyes "), one pair in most species, but two or even three pairs in some.

Two distinct ocellus types exist: dorsal ocelli ( or simply " ocelli "), found in most insects, and lateral ocelli ( or stemmata ), which are found in the larvae of some insect orders.

The ocelli co-exist with the compound eyes, thus most insects possess two anatomically separate and functionally different visual pathways.

Recent studies have shown that the ocelli of some insects ( most notably the dragonfly, but also some wasps ) are capable of form vision as the ocellar lens forms an image within, or close to the photoreceptor layer.

However " eyes " in gastropods range from these simple ocelli which cannot process an image being only able to distinguish light and dark, to more complex pit eyes, and even to lens eyes.

They have large compound eyes, and typically three ocelli.

Chaetognaths have two compound eyes, each consisting of a number of pigment-cup ocelli fused together.

In primitive forms the acron has a pair of compound eyes on the sides and four pigment-cup ocelli (" little eyes ") in the middle.

The first tagma of the fly, the head, consists of ocelli, antennae, compound eyes, and the mouthparts ( the labrum, labium, mandible and maxilla make up the mouthparts ).

They have mandibulate mouthparts and large compound eyes, and may or may not have ocelli, depending on the species.

Arachnids have two kinds of eyes, the lateral and median ocelli.

The lateral ocelli evolved from compound eyes and may have a tapetum, which enhances the ability to collect light.

Millipede eyes consist of a number of simple flat lensed ocelli arranged in a group on the front / side of the head.

They have simple mouthparts with chewing mandibles, long, multi-segmented antennae, large compound eyes and two or three ocelli.

Adults have short, flexible antennae, large compound eyes and three ocelli.

Also, the larvae of all Apocrita do not have legs, prolegs, or ocelli.

These spots, called ocelli, play an important role in intraspecific communication.

Some gastrotrichs also possess photosensitive cells within the brain that function as primitive ocelli.

Mariko Takahashi found no evidence that peahens expressed any preference for peacocks with more elaborate trains, such as trains having more ocelli, a more symmetrical arrangement or a greater length.

The median ocelli develop from a transverse fold of the ectoderm.

These ocelli have been suggested to function to limit fin-nipping by piranha ( Serrasalmus spp.

After the full complement of legs is achieved, the now post-larval stadia (~ 5 stages ) develop gonopods, sensory pores, more antennal segments, and more ocelli.

The eyespots each consist of a mass of ocelli, each consisting of pigmented epithelial cells that respond to light and narrow sensory cells lying between them.