Simple eye in invertebrates - Wikipedia
Stemmata (singular stemma) are a class of simple eyes. Many kinds of holometabolous larvae bear no other form of eyes until they enter their final stage of growth. Adults of several orders of hexapods also have stemmata, and never develop compound eyes at all.
Ocelli and Stemmata - ScienceDirect
Jan 1, 2009 · The second group of simple eyes, formerly termed “lateral ocelli” but now termed “stemmata” (singular stemma), is found in the larvae of Holometabola. Stemmata are innervated laterally from the optic lobes, and typically there is a group on each side of the head.
Photoreceptors – ENT 425 – General Entomology
Lateral ocelli (=stemmata) are the sole visual organs of holometabolous larvae and certain adults (e.g. Collembola, Zygentoma, Siphonaptera, and Strepsiptera). Stemmata always occur laterally on the head, and vary in number from one to six on each side.
Arthropod eye - Wikipedia
Some insect larvae, e.g., caterpillars, have a different type of simple eye known as stemmata. These eyes usually provide only a rough image, but (as in sawfly larvae) they can possess resolving powers of 4 degrees of arc, be polarization sensitive and capable of increasing their absolute sensitivity at night by a factor of 1,000 or more. [ 4 ]
stemma, stemmata - BugGuide.Net
May 7, 2009 · stemma noun, plural stemmata - the simple eye of a certain larval insects, also called lateral ocelli, though they are not homologous with ocelli. They are found on the heads of the larvae of most holometabolus insects.
Escaping compound eye ancestry: the evolution of single …
Aug 15, 2014 · Larval eyes of holometabolous insects are derived from compound eyes, and are called stemmata. They also have been referred to as lateral ocelli, though they are distinctly different from the medial ocelli of adult insects. In most orders, only five to seven stemmata are present (Paulus, 1986), and many of them are quite simple visual organs.
Insect Sensory System - SpringerLink
May 27, 2021 · Stemmata are the visual structures of holometabolous larvae, occurring laterally on the head and can vary in number from one (most typically) to six on each side (Chapman et al., 2013) (Fig. 3c, d). Stemmata have been wrongly called lateral ocelli, but they differ in …
Escaping compound eye ancestry: the evolution of single
Aug 15, 2014 · Stemmata, the eyes of holometabolous insect larvae, have gained little attention, even though they exhibit remarkably different optical solutions, ranging from compound eyes with upright images, to sophisticated single-chamber eyes with inverted images.
Anatomy of the stemmata in the Photuris firefly larva
Jan 16, 2019 · We investigated the structure of stemmata in Photuris firefly larvae to identify anatomical substrates (i.e., rhabdomeres) conferring visual function. Stemmata were located bilaterally on the antero-lateral surfaces of the head. Beneath the ~ 130 µm diameter lens, we identified a pigmented eye-cup.
Evolution of Insect Eyes: Tales of Ancient Heritage, Deconstruction ...
Oct 18, 2008 · Stemmata are larval eyes found specifically in indirectly developing insects (Endopterygota or Holometabola) like butterflies, honeybees, and Drosophila, and which undergo dramatic changes during postembryonic development (Kristensen 1999; Friedrich 2003).
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