Dipseudopsis oliveri, Oláh, János & Johanson, Kjell Arne, 2010

Oláh, János & Johanson, Kjell Arne, 2010, Contributions to the systematics of the genera Dipseudopsis, Hyalopsyche and Pseudoneureclipsis (Trichoptera: Dipseudopsidae), with descriptions of 19 new species from the Oriental Region., Zootaxa 2658, pp. 1-37 : 6-8

Dipseudopsis oliveri , new species

Figs 7–16

This species is bright coloured with a characteristic pattern on the forewings. It is similar to D. doehleri Ulmer. Dipseudopsis oliveri has 5 translucent spots on each forewing, while D. doehleri has 3 spots. The modified spur has a twisted, apical part being 2/3 as long as the spur, not 1/3 as long as the spur as in D. doehleri . The head is yellowish, while in D. doehleri it is dark brown.

Male. Wing and body colour patterns highly contrasting. Head, cervical sclerites, prothorax, apical half of foreleg femur, coxae, trochanter and femur of mid legs and hind legs, as well as abdomen bright yellow.

Head. Antennae, maxillary palps, labial palps, mesonotum, metanotum, forelegs (except apical half of femur), tibiae and tarsi of mid and hind legs, mid leg episterna and precoxale, abdominal tergum III, and genitalia dark chestnut brown. Tentorium simple, dorsal arms absent, vestigial structures invisible; anterior tentorial arms slender in dorsal view, slightly broadening at middle in lateral view. Frontoclypeogenal septum well developed; anterior tentorial pits located dorsolaterally; frontogenal arms extending dorsad from anterior tentorial pits to margin of circumantennal sclerites, shorter than clypeogenal arms; posterior tentorial arms short, robust; tentorial bridge shifted posterad almost to posterior tentorial pits. Antennae stout, as long as forewings; scapes short, half as long as head, closely set, almost touching, interantennal distance narrower than length of scapes; membranous antennal sockets large, providing space for movement of scapes, characteristically depressed and delineated by elevated and strongly sclerotized rim of antennal and frontal grooves. Stipes large. Enlarged bulging clypeus covering stomodaeal pump, dominating face. Coronal groove well developed, visible along almost entire vertex, except anterior section diverging into frontal branches indiscernible. Lateral cervical sclerites long, triangular, forming narrow anterior arms articulating anterad with occipital condyles near posterior tentorial pits, fusing with posterior cervical sclerites; posterior cervical sclerites broadening slightly posterad, forming elongate triangular plates reaching and articulating to prothoracic episternum and to weakly sclerotized anteromedian band of prothoracic eusternum by narrow ventral intercervical sclerites.

Thorax. Mesoscutum bearing pair of broad, mesal bands of tiny alveoli, separated by longitudinal, median, shallow furrow; similar pattern visible on mesoscutellum, except alveoli in 2 bands separated by median groove forming diamond-shaped elevated surfaces. Foreleg posteroapical spurs slightly longer than anteroapical spurs; mid leg posterior spurs longer than anterior spurs; modified hind leg spurs un-branched, slightly longer than adjacent anteroapical spur; basal 1/3 unmodified, apical 1/3 twisted 180° into short, spiralshaped ridge with mesad-directed apical point; median 1/3 excavated and twisted concavity filled by closely set setal bundle; alveoli located on bottom of twisted concavity.

Forewing length 16.0 mm. Forewing and hind wing membranes dark chestnut brown with translucent, contrasting pattern; entire membrane surfaces densely covered by short, dark, decumbent setae; setae on translucent patterns whitish; wing pattern including 7 spots, 5 on each forewing and 2 on each hind wing. Forewing spots present on basal costal narrow stripe, in basal 1/5th of costal cell between costa and subcosta; in postanal band on basal half of postanal area; basally between R1 and Cu1 to fork I on Rs and M; in arculus; in subapical, irregularly transverse patch distal of cord. Hind wing spots weak; basal triangular spot present from R1 to Cu2 and A; rounded spot located at apex.

Male genitalia. Abdominal segment IX consisting of weakly developed tergite and well-developed sternite connected by narrow strip on each side composed of antecostal ridge and fused base of large preanal appendage. Tergite IX triangular, with 2 lateral setose fields visible in lateral and dorsal views, deeply overhanging segment X; sternite IX quadrangular in lateral view, with complex bulging basodorsal corner articulating with antecostal ridge and preanal appendages; additional complex sclerotized structures hinged to meeting point of basodorsal corner, forming mesosuperior processes sensu Weaver and Malicky (1994), forming complete complex ring encircling phallobase; composed of narrow ventral, wide lateral, and long mesosuperior parts, beneath partially sclerotized basoventral part of segment X; all possibly representing complete, sclerotized phallocrypt complex. Phallobase somehow fixed by short phallic apodeme to phallocrypt complex; free basal plate, or rather long unattached rod of apodeme of inferior appendages present below phallocrypt complex; apicodorsal corner of sternite IX densely packed with microtrichia and sharp cuticular denticles, this region delineated ventrally by longer setae. Segment X shorter than inferior appendages, half as long, originating deeply beneath overhanging tergite IX, forming well-pigmented hood above phallus, with weakly discernible setose areas, thumb-like in lateral view, bluntly sagittate in dorsal view, with small apicomesal excision. In lateral view, intersegmental depression between segment IX and segment X forming deep concavity beneath overhanging tergite IX. Preanal appendages elongate auriform, each with dorsoapical, slender, finger-like, digitate process, fused to antecostal ridge of segment IX along wide basal part, hinged dorsally to tergite IX and ventrally to basodorsal corner of sternite IX. Inferior appendages almost 2 times longer than segment X; clearly thumb-like in lateral and dorsal view. Phallic apparatus small; phallotheca with heavily sclerotized, broad basal half and narrowing apical half; basal half interspersed with short setae; delineation of membranous dorsal and apical endotheca and aedeagus weakly discernible; apical portion ending in dark cap of very densely packed microtrichia.

Holotype male: VIETNAM: Quangtri Province, Da Krong Nature Reserve, headquarters, 17.v.2007, at light [G. Csorba], (OPC).

Paratypes: Same data as holotype, 4 males, 2 females (OPC); Quangtri Province, Huong Hoa District, A Xoc village, 350 m, 16°53’11’’N, 106°34’15’’E, 6.xi.2007, at light [G. Csorba], 1 male (OPC).

Etymology. This species is dedicated to Dr. Oliver S. Flint, Jr. (NMNH) in recognition of his enormous contributions to caddisfly systematics.

Figures

FIGURES 7 – 10. Dipseudopsis oliveri, new species, holotype male. 7 — head, frontal; 8 — head, dorsal; 9 — head tentorium, dorsal; 10 — head tentorium, lateral.

FIGURES 11 – 16. Dipseudopsis oliveri, new species, holotype male. 11 — right wings, dorsal; 12 — left hind leg apical tibial spurs; 13 — genitalia, left lateral; 14 — genitalia, dorsal; 15 — inferior appendage, ventral; 16 — phallus, left lateral.