Psilotreta enikoae, Oláh & Johanson, 2010

Oláh, János & Johanson, Kjell Arne, 2010, Description of 33 new species of Calamoceratidae, Molannidae, Odontoceridae and Philorheithridae (Trichoptera), with detailed presentation of their cephalic setal warts and grooves 2457, Zootaxa 2457 (1), pp. 1-128 : 98-100

Psilotreta enikoae , new species

Figs 224–231

This medium-sized species with dark gray forewing has all characters characteristic for the species in the P. japonica diagnostic species-group. The species resembles P. papaceki Malicky from Vietnam in the absence of intermediate appendages in the genitalia. It is easily separated from P. papaceki in the dorsal view of the genitalia by the presence of a broad dorsomedian setose process, which is very narrow in P. papaceki ; the arched shape of segment IX, the cylindrical coxopodites, and the digitiform harpagones.

Male (in alcohol). Body medium-sized; light brown; legs, antennae and palps light yellowish; forewings dark cinereous. Head rectangular in dorsal view, about 2 times broader than long. Ocelli absent. Facial groove pattern modified by depressed indentation dominating on frons; frontal groove, facial arms branching from coronal groove fused, forming pronounced mesal vertical groove running along centre of depressed indentation; pronounced vertical line of frontal groove forming continuation of deep fissure separating vertexal mediantennal pair of compact setose warts. Frontogenal vertical groove present in narrow fossulae. Clypeogenal vertical grooves located ventrally of anterior tentorial pits; short, oriented obliquely laterad. Subantennal grooves orienting vertically, close to ocellar grooves, slightly turning mesad anteriorly, almost confluent to clypeogenal grooves. Subocular grooves merged to anterior meeting point of subantennal and clypeogenal grooves. Vertexal groove pattern simple; coronal groove starting from deep fissure, interrupted, conspicuous on posterior half of vertex; occipito-postgenal groove partly merging anterad, tangential with occipital compact setose warts. Labrum elongate, without setal warts; anterior part movable, freely hanging. Mandibles small, weakly pigmented; laciniae broad. Frontal setal warts absent on face. Elongate, narrow pair of frontogenal compact setal warts present from antennal sockets along subantennal groove of pregenae; anteriorly narrowing; representing only compact warts visible on face. Vertexal lateroantennal compact setal warts fused with vertexal mediantennal compact setose wart, forming large, setose wart on interantennal elevated hump, separated by deep fissure. Occipital compact setose warts rounded, slightly ovoid obliquely. Vertically elongated postgenal compact warts curving along posterior section of ocular grooves. Maxillary palps darker than body; maxillary palp formula I-II-IV-III-V; each basal segment without setose subapicomesal nodule. Each scapes as long as head. Each pedicel much shorter than first segment of each flagellum. Pronotum with 1 pair of warts dominating on dorsum; warts transversely elongate, broad, rounded, mesally tangential, slightly narrowing laterally. Pair of rounded, longitudinally elongated mesoscutal compact setose warts present. Pair of mesoscutellar, diffused setal warts visible in linear, narrow bands. Each proepisternum with large, ovoid setose wart. Precoxiale each with small setal wart. Small, compact setal wart present on anterior section of each cervical sclerites, almost hidden by head and pronotum. Lateral cervical sclerites forming narrow anterior arms articulating anteriorly to back of head with occipital condyle above posterior tentorial pits, fusing to posterior cervical sclerites; posterior cervical sclerites forming rounded, posteriad broadening plates, reaching prothoracic episternum, articulating to weakly sclerotized anteromedian band of prothoracic eusternum by ventral intercervical sclerites. Cervical sclerite complex dark, clearly visible on pale, membranous background. Leg claws symmetrical; spur formula 2, 4, 4; posterior spurs on all legs slightly shorter than anterior spurs. Forewings: length 7.0 mm; membrane dark cinereous, without pattern; R1 running separately to C, not confluent with, or recurrent into R2; base of discoidal cell located proximally of mid-length of wing; fork I about 2 times longer than fork II; forks III and IV absent; fork I, petiolate, fork II almost sessile, crossveins sc- r, r, s, r-m and cu-a present, crossveins m and cu absent; postanal vein present. Hind wings: R1 running separate before C; fork I about 2 times longer than fork II.

Male genitalia. Abdominal segment IX fused annularly, with longitudinal groove separating small dorsum from rest of segment; tergum IX reduced to complex of narrow strips; tergum IX not reduced; posterior margins of segment IX straight oblique from gonocoxites to preanal appendages. Antecostae well developed, forming dark marginal rims on ventral, concave section. Tergum IX with complex of dark strips protruding posterad to segment X, forming 3 dark groove strips and internal ridges meeting anteriorly: longitudinal grooves separating tergum from rest of segment IX; second grooves reinforcing lateral plates of segment X; third grooves present along upper margin of tergum. Spine rows on posterior margins of segment IX absent, 2 well-defined setose areas on apicopleural and apicoventral parts. Intersegmental depression between segment IX and segment X filled. Segment X forming dorsomedian, broad, almost parallel-sided body in dorsal view; slightly broadening basad; straight and narrow in lateral view; marginated or fringed by sparsely packed setae. Pair of lateral processes on segment X forming vertically flattened plates, dark, dorsal strip parallel-sided in lateral view; slightly toothed ventroapically. Broad basal plates weakly pigmented, almost indiscernible, except ventral margins with long, dark spine. Apicoventral setose lobes represented by apical 1/3rd of dorsomedian body. Apicodorsal setose area forming pair of elevated setose warts at dorsal base of segment X; apex of segment X rounded, without dorsal interlobular area. Preanal appendages long, filiform in lateral view; digitiform, with tapering apices in dorsal view. Gonocoxites as long as preanal appendages and lateral processes of segment X; cylindrical, slightly broadening at midway. Harpagones narrow, long, straight in lateral; curving mesad in ventral view. Phallic apparatus straight constricted at mid-length; dorsum and venter concave in lateral view. Phallotheca sclerotized, forming ventrad-curving lobe. Endotheca short, with 2 pairs long, tangential spines, easily seen inside phallotheca in ventral view. Small, elongated, weakly discernible phallotremal sclerite visible at basis of phallicata, above parameres, seen in retracted phallic apparatus.

Holotype male: VIETNAM: Quang Tri Province: Da Krong Nature Reserve , 2 km SE of HQ, 16.v.2007 light trap at forest stream [G. Csorba] – ( OPC).

Distribution: Vietnam.

Etymology: Enikoae, named after Enikő Julia Oláh, the daughter of János Oláh, born few days after this species was collected.

Figures

FIGURES 224–226. Psilotreta enikoae, new species, holotype. 224 —head, frontal; 225 —head, dorsal; 226 — right forewing.

FIGURES 227–231. Psilotreta enikoae, new species, holotype. 227 — genitalia, lateral; 228 — genitalia, dorsal; 229 — gonocoxite, ventral; 230 — phallus, lateral; 231 — phallus, ventral.