Male and female genital fields similar to those of subgenus Unionicola; pedipalps somewhat elongate and typical of Unionicola but with distal clawlets obscure; first walking legs significantly less setose
than those of subgenus Unionicola; first walking leg with no elongate, obviously thickened, rather blunt setae on genu and tibia, with tarsus rather undifferentiated.
Setae are often associated with the 1st gonapophysis, and although they do not form species-specific patterns, the abundance of setae is consistently densely setose
, sparsely setose
, or glabrous.
Head: Dark red-brown, red-gold and silver pruinose, extensively brown and white setose
Left paramere heavily setose
, with long hypophysis; sensory lobe with stout protuberance basally.
Capitulescences monocephalous, terminal, sometimes on scapes, corymbose to paniculate; capitula heterogamous, radiate or discoid; involucre multiseriate; receptacle epaleate, pilose to setose
Reed (from Brazil and Argentina), but this species differs by the size of the leaves (19-55 cm long), pinnae more numerous and incised, indument of resinous glands on abaxial side of laminar tissue, and setose
80; scutum covers most of dorsal surface, remainder of cuticle setose
2 times longer than penultimate segment, tapering distally, with some spines on truncate distal margin; lateral surface of ultimate segment longitudinally carinate, with row of stiff setae; cross section trigonal; antepenultimate segment flattened dorsoventrally, with numerous heavily plumose setae on margins and with prominent cluster of long setulose setae on low elevation at proximomesial part; coxa heavily setose
, with large, bilobed epipod; no strap-like process on epipod.
Although the larvae of the fifth stage have somewhat natatory setose
on their pleopods, they appear not to be completely functional.
The labium was about twice as wide as long and setose
along distal margin with the proximal labial palp segment (length = 0.
10) with uncus trapezoidal, posterior margin emarginated medially, with a digitate process and an elongate, distally-curved, apically-obtuse process posteriolaterally; socius elongate, slender, as long as valva, setose
dorsally; V-shaped ridge at junction between uncus and tegumen.
Thorax: Prosternum fused with proepisternum; dorsocentral setae reach transverse suture but do not extend anterior to it; postpronotal lobe with fine, long setae; scutellum with only one pair of marginal macrosetae; anepisternum never with strong macroseta at superoposterior angle, in front of wing insertion; katatergite with a vertical row of macrosetae; anatergite setose