ocellar


Also found in: Dictionary, Thesaurus, Medical.

ocellar

[ō′sel·ər]
(petrology)
Of the texture of an igneous rock, having crystalline aggregates of phenocrysts arranged radially or tangentially around larger euhedral crystals or which form rounded branching forms.
Mentioned in ?
References in periodicals archive ?
Posterior ocelli usually separated by a little less than an ocellar diameter.
by ocellar seta short but well differentiated from ocellar triangle setulae, scutellar dorsum with moderate grey to light brownish grey pruinosity when viewed from certain angles, cercus in profile with basal two-thirds less robust, apical one-third slightly longer, anterior protuberance between cerci in the midlength smaller, and cerci in posterior view with lateral edges straighter.
Organization and physiology of the insect dorsal ocellar system.
Face silver pruinose, frons and vertex red-gold pruinose, mystax black, ocellar macrosetae black.
Body largely glabrous, sparsely covered with minute, appressed, simple yellowish to whitish hairs except long, stout, erect hairs as follows: distal margin of labrum and inferior margin of mandible (longest at least twice median ocellar diameter); vertex and preoccipital border with few sparse hairs (at most width of median ocellar diameter); anterior and lateral margins (next to axilla) of mesoscutum, axilla, and mesoscutellum (1-2 times median ocellar diameter), hairs longer on mesoscutellum; mesepisternum ventrally, meso- and, metacoxae, mesotibia, and propodeum laterally (1-1.5 times median ocellar diameter); posterior margin of metatibia, sides of T2-T4, entire T5 and T6 with dark brown hairs (1.5-2 times median ocellar diameter) (Fig.
Carapace 1.32 long, 1.47 wide, with pale ocellar areas present but diffuse, those areas without scale-like setae.
These ocellar aggregations typically have fewer than a dozen facets.
(9') Ocellar III setae pair Frankliniella schultzei arising at a level slightly (Trybom) posterior to the anterior margin of posterior ocelli (Fig.
Face, frons and vertex dull red-gold pruinose, mystax black, ocellar macrosetae black.
Head: holoptic, frontal vitta obliterated, chestnut color, widened when reaching the lunule, in the more slender portion with approximately 1/2 diameter of the anterior ocelli; parafrontal and parafacialia yellow with silver tomentum and bare; gena yellow with silver tomentum, postgena and occiput white tomentum, with thin and long hairs; face and clypeal membrane pale; ocellar triangle chestnut; scape, pedicel, flagellomere and palp orange in color.