The anterior lobe of the middle body is large, subcircular
, separated from the crescentic posterior lobe by the discontinuous middle furrow completely fading in the mid-part.
Subcordate to subcircular
, slightly longer than wide, 39 [micro]m long, 32 [micro]m wide; operculum cordate, almost covering the orifice and obscuring the lingula, 26 [micro]m long, 22 [micro]m wide.
Eye small, subcircular
, subcutaneous, located dorsally at the posterior half of head.
, strongly oblique to vertical axis of shell; peristome incomplete, interrupted briefly in parietal region; rim of peristome reflected forming a flaring lip, but this not noticeably enlarged in columella region.
1, 4, 7, 10, 13, 16), and subcircular
4j, m) to subcircular
(47%; Fig 4h, k) to ellipsoidal (2%) in plan view.
The dehiscent 2-winged fruit has a subcircular
outline with a cordate base and apex and an elongated protruding apical extension.
The pleopods are similar to those of the type, their exopodites extending considerably beyond the margins of the pleomeres, the subcircular
endopodites not covering the central region of the dorsal surface of the pleon.
They seem to represent a variety of building styles with square, rectangular or subcircular
shape (Jorgensen 1998: Figure 10).
Small bransoniid-like shell with non-inflated body; snout tapering slightly in dorsal view, separated from body by broad concavity; dorsal margin convex in lateral view; rostral face subcircular
, concave laterally around rostrum; beaks opisthogyrate; rostral clefts present; ventral orifice small; anterior gape large, extending length of snout, slight constriction near anterior end, denticles short; large, rounded primary carina; 7-8 rounded, closely spaced, body costae; 13-14 narrower, more widely spaced costae on snout; 14 low, narrow, closely-spaced, concentric costae on rostral face; rostrum smooth; fine, closely spaced, comarginal lirae and coarse growth lines present; larval shell not preserved.
This dimension was chosen because it measures the part of the bone where the shaft is circular or subcircular
Gold mineralization occurs within quartz-pyrite veins occupying shear and dilatant structures within a 4 km diameter subcircular
quartz diorite intrusion.