160-162) setose, with field of curved, anteriorly-directed spinelike
spinules restricted to distal half of segment.
Antennae short, with three distinct segments; scapus oval in dorsal view, more or less triangle-shaped in cross section, larger than compound eyes, about four times longer than pedicellus; pedicellus minute and indistinct, knob-like, smaller than compound eyes; third segment generally cylindrical, apices blunt, tapering basally, about four times longer than scapus, inner margin elevated medially, first half of inner margin with minute spinelike
Ribeiria spinosa Babin & Branisa, 1987 from the middle Darriwilian (Llanvirn) of Bolivia and from the Floian (Arenig) of Northwestern Argentina differs in spinelike
projection, placed ahead of the pegma.
, numerous, 2.5 mm long, apices pointed, tapering distally.
--Frons entire, with a spinelike
process anteriorly (Fig.
24, paratype): orange-brown, scape and pedicel orange setose (1 dark red-brown setae), postpedicel tipped with obliquely situated pit-enclosed spinelike
sensory element (terminal stylus 'segment' absent).
A line of pins tracing a spinelike
ridge, these towers--and the ephemeral weather effects they produce--suggest a mutable monumentality appropriate to Tschumi's event-based vision of the twenty-first-century city.
Using millimeter-scale polymer beads for vertebrae and thin elastic threads for muscles and ligaments, the researchers have created spinelike
structures that can deform drastically, even become damaged, yet still return to their original forms.
supraciliary scales between the eye and supraoculars and usually at least 23 dorsal scale rows at midbody distinguish B.
Annuli numbering 69-70, with spinelike
cuticular projections prominent in some individuals.
White and Jarosewich (1971) reported it as occurring "as flat, unmodified rhombohedral crystals which appear to be arranged epitaxially around spinelike
crystals of calcite." The color ranges from pale yellow to pale yellowish brown.