Synonymer & Information om | Engelska ordet SUBQUADRATE

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• Benton also indicated some unique derived traits, or autapomorphies, for the species: a long basipterygoid process on the braincase; a dentary that is short in relation to the total length of the lower jaw; an ilium that has a back end that is subquadrate instead of rounded.
• Cephalon: Cranidium subquadrate, glabella cylindrical, slightly contracted at S3, three pairs of glabellar furrows, preglabellar field short or absent, eye ridge wide, long, directed slightly postero-laterally, palpebral lobe cresentic, posterior area of fixigena with fulcrum, free cheeks (or librigenae) with long spines; hypostome conterminant, attached to a narrow rostral plate.
• It is like Luperina testacea, but olive grey, without any rufous tinge; inner and outer lines conversely edged with whitish; a blackish shade before inner line from median vein to inner margin, interrupted at vein 1; claviform stigma broadly blackish; orbicular a minute white spot; reniform subquadrate, with fuscous centre and broad white annulus, the area beyond it blackish, submarginal line whiter, preceded, except between veins 6 and 7, by a blackish shade; a row of neat black marginal lunules; fringe dark grey pencilled with light grey; hindwing pure white, with dark marginal lunules and white fringe; the veins dark.
• Hindwing: subbasal band of even or nearly oven width; discal and subterminal pale lines obscure; postdiscal series of spots well separated, quadrate or subquadrate, very seldom narrow.
• Forewing: the cell, basal two-thirds of interspaces 1a, 1, 2 and 3, and the extreme base of interspace 4 suffused with a beautiful pale violescent blue; a curved series of three subquadrate preapical white spots.
• Arietites is a genus of massive, giant evolute, psiloceratacean ammonites in the family Arietitidae in which whorls are subquadrate and transversely ribbed and low keels in triplicate, separated by a pair of longitudinal grooves, run along the venter.
• Hughmilleria is distinguished from other members of Pterygotioidea by its streamlined body, its subquadrate prosoma (head), its medium-sized chelicerae, its small overall size and the various characteristics it shares with Eurypterus.
• The prosoma (head) was large, with a subquadrate (almost square) to semielliptic (nearly elliptic), horseshoe-like outline.
• Its prosoma (head) could be subquadrate (almost square) or subrectangular (almost rectangular), with reniform (kidney-shaped) eyes.
• It differs from Campbelloceras in that Campbelloceras is only slightly impressed, from Centrotarphyceras in that Centrotarphyceras is subquadrate and has a central siphuncle, and from Trocholites in that although Trocholites is subcircular in cross section, the siphuncle is subdorsal.
• Whorl sections are generally compressed but may be subquadrate to subtrapezoidal or coronate (heart shaped), or slightly depressed dorso-ventrally.
• The shell shape of Astarte borealis is ovate to subquadrate to sub trigonal with umbones subcentral, just dorsal of midline, and often eroded in older individuals.
• Chidleyenoceras is a Middle Ordovician tarphyceroid with a closely coiled, evolute shell; whorl section subquadrate, widest just above a broadly rounded venter; dorsum with a broad shallow impression; sutures moderately spaced, weakly sinuous; siphuncle large, subventral, apparently orthochoantitic with tubular segments.
• The body whorl is angulate The base of the shell is a little convex, sculptured with cinguli articulated with buff The aperture is subquadrate and green inside.
• The umbilicus is bordered by a liration, consisting of a row of subquadrate beads This umbilicus is pervious and funnel-shaped.
• Forewing greyish black-brown; an obscure, oblique, subbasal black band, and curved antemedial band; a subquadrate hyaline (glass-like) spot in end of cell; a blackish discoidal bar; an ill-defined postmedial blackish band excurved between veins 5 and 3, then bent inwards to below angle of cell, and with a curved hyaline band beyond it from vein 8, narrowing to vein 3, and with a curved dark patch beyond it from costa to vein 5; terminal dark patches at apex and below vein 5.
• Cloak oblong or subquadrate, with the margin slightly sinuated and turned up at the sides, and also in front, where it is bent back in a rounded lobe; the posterior end bending inwards behind the branchiae: the cloak is densely freckled like the rest of the body, having an irregular pale line running down each side: the margin is also pale, with a few black and yellow spots; and an irregular line of light spots runs along each side of the body below the pallial margin.
• Adults are cupreous brown, the forewings cupreous, purple tinged, with two silvery-white oblique streaks at the base, and with eight white semihyaline (almost glasslike) spots, of which four are subquadrate and larger than the rest.
• The genus can be recognised by: head with mandibular plates longer than clypeus and converging in front of it; an angular, transversely directed projection in front of each eye, the eyes subpedunculate; the antennae each with 4 segments and the pedicel and basiflagellum angular in cross section and all faces deeply furrowed between the edges; the pronotum subquadrate in shape with its anterior margin much broader than the head; the wings often reduced (brachypterous); and the lateral margins and posterolateral angles of pregenital abdominal segments without tubercles.

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