Phylloicus spinulacolis, Prather, 2003

PRATHER, AYSHA L., 2003, Revision of the Neotropical caddisfly genus Phylloicus (Trichoptera: Calamoceratidae), Zootaxa 275 (1), pp. 1-214 : 95-96

Phylloicus spinulacolis , new species

Figs. 100 , 101

This species is known only from two specimens, collected in copula as tenerals, and somewhat battered. Thus, details of coloration are unavailable. Phylloicus spinulacolis is small and black, and the male is remarkable for, and easily distinguished by, the prominent spine­like setae on the ventrolateral lobes of the phallic endotheca ( Fig. 100D, E ).

Adult. Forewing length 9 mm, n = 2.

Head black. Maxillary palps golden brown, covered with dark brown setae. Antenna twice forewing length; dark brown. Dorsal pterothorax black; ventrolateral thorax dark brown. Legs dark brown. Metathoracic leg of male with posterior fringe of long setae. Tibial spur formula 2,4,2. Forewing flat; dark brown, or black; without colored markings. Hind wing basal brush absent.

Male. Preterminalic abdominal terga without anteromesal notches. Corematic structures absent, terga III­V unmodified, without membranous lobes or sclerotized processes. Sternum VII with short, acute anteromesal process. Sternum VIII similar to anterior sterna, sternum IX not elongate. Tergum IX without mesal ridge; posterior margin smoothly rounded ( Fig. 100A, B ); lateral ridge present; dorsal pleural setae approximately 10, ventral pleural setae absent ( Fig.100A ); sternum IX with paired mesolateral ridges; sternum IX ( Fig. 100C ). Preanal appendage less than 2/3 length of tergum X, widest near base, setae long, but not filamentous or longer than appendage ( Fig. 100A, B ). Tergum X without basal lobes; basodorsal process absent; basolateral processes of varying length and often asymmetrical; apex, in lateral view, rounded, in dorsal view, notched, notch deep and triangular; setose dorsally ( Fig. 100A, B ). Harpago large, rounded; peglike setae many, apical ( Fig. 100A, C ). Phallic endotheca with paired apicolateral lobes and paired basolateral lobes, basolateral lobes large and round and bearing spine­like setae, apicolateral lobes large and rounded; phallotremal sclerites average size, longest dimension less than diameter of phallobase; dorsal sclerite ovoid, in dorsal view horseshoe­shaped ( Fig. 100D, E ).

Female. Preterminal abdominal terga without anteromesal notches. Sternum VII with short pointed anteromesal process. Tergum VIII without posterolateral brush; sternum VIII cleft posteromesally to anterior ridge; sternum VIII ( Fig. 101C ). Tergum IX with mesal ridge extending length of segment; posterior margin marked mesally by acute ridge ( Fig. 101B ). Sternum IX anterior lobes darkly sclerotized and striate, posterior lobes smooth, punctate, without distinct area of thin cuticle or invagination ( Fig. 101A ). Tergum X appendage length equal to mesal lobe, base distinct, apex rounded; mesal lobe lightly sclerotized; digitate lateral processes very short, length less than diameter and often asymmetrical ( Fig. 101B ). Sternum X with patches of short fine setae posterolaterally to anal opening ( Fig. 101A ). Vaginal apparatus anterior sclerite elongate; anterior sclerite emarginate anteriorly, posterolateral projections absent; posterior sclerite triangular; posterior end of spermatheca membranous ( Fig. 101A ).

Holotype male: VENEZUELA: Falcón: Río Ricoa near Dos Bocas, 11°17'19”N, 69°26'04"W, 157 m, 8.vi.2001, Holzenthal, Blahnik, Paprocki, & Cressa ( UMSP).

Paratype: VENEZUELA: Falcón: Río Ricoa near Dos Bocas, 11°17'19”N, 69°26'04"W, 157 m, 8.vi.2001, Holzenthal, Blahnik, Paprocki, & Cressa — 1 female ( UMSP) .

Distribution. Venezuela.

Etymology. Spinulacolis, from the Latin spinula, “S,mall spine” and colis, “penis,” for the small spines on the phallic endotheca.

Figures

FIGURE 100. Phylloicus spinulacolis. Male (holotype): A—lateral view; B—dorsal view; C— sternum IX and inferior appendages, ventral view; D—phallus, lateral view; E—phallus, ventral view.

FIGURE 101. Phylloicus spinulacolis. Female (UMSP000063358): A—sterna IX, X and vaginal apparatus, ventral view; B—terga IX and X, dorsal view; C—sternum VIII, ventral view.