Anisocentropus (Anisomontropus) csorbai, 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 : 60-63

publication ID 10.11646/zootaxa.2457.1.1


persistent identifier

treatment provided by


scientific name

Anisocentropus (Anisomontropus) csorbai

sp. nov.

Anisocentropus (Anisomontropus) csorbai , new species

Figs 123–128 View FIGURES 123–128

This species is large and ochraceous, with almost whitish mesoscutum. The forewing membranes and setae are brownish; lighter patches are present around the crossveins. The genitalia are similar to those of A. janus Malicky & Chantaramongkol , but in A. csorbai the gonocoxites are broader, and the preanal appendages are straight in lateral view. The wing pattern is also different between the 2 species.

Male (in alcohol). Body large, ochraceous; palps, legs paler than rest of body; mesoscutum nearly whitish dorsally; forewings brownish, with lighter patches along crossveins; forewing membrane light dotted. Head rectangular in dorsal and facial view, almost as long as broad. Ocelli absent. Tentorium not visible. Facial groove pattern forming plate-like flange, or rim, connecting anterior tentorial pits. Theoretical line separating frons and clypeus forming oblique, dorsad continuation from anterior tentorial pits, almost horizontally merging with broad antennal grooves. Clypeogenal vertical grooves located ventrally of anterior tentorial pits, short, running slightly mesoventrad; plate-like flanges, and frontogenal and clypeogenal sutures forming complex of anterior tentorial arms (frontogenal septa). Small, poorly visible, subantennal grooves sinuous, running almost horizontally between large frontogenal compact wart and palpifers, forming proximal articulation of palpi on stipes. Subocular grooves invisible. Frontal groove pronoumced, short, present between antennae, joining vertexal medioantennal compact setose warts. Vertexal groove pattern reduced. Large, anterad directed, rounded elevation dominating anterior half of vertex, reaching interantennal area, laterally delineated by large membranous antennal sockets with corrugated, or granulous, surface near compact frontogenal setose wart. Epicranial groove (coronal groove) with vestigial stem. Antennal and ocular grooves accompanied by occipito-postgenal grooves, partly merging anteriorly; tangential to large occipital compact setal warts. Labrum vertically long, nearly triangular with rounded apex, freely hanging, sparsely setose. Mandibles long, curving mesad, weakly pigmented, located laterally along labrum. Lacinia broad, elongate, bearing few setae. Frontal setal warts absent; frontal interantennal warts absent due to anterad directed vertexal elevation. Pair of large, nearly triangular frontogenal compact setal warts present on posterior pregenae, directed obliquely or almost horizontally from frontogenal grooves, representing only visible setal warts on face. Triangular elevation on vertex with fused vertexal medioantennal compact setose warts anteriorly on head. Vertexal lateroantennal compact setal warts absent. Antennal sockets large; pair of small, rounded vertexal ocellar compact setose warts, and equally sized or slightly larger pair of vertexal medioocellar compact setose wart visible in middle of vertex. Pair of large, obliquely located, ovoid occipital compact setose warts dominating on posterior half of vertex. Pair of small postgenal compact setose warts visible between posterior section of ocular grooves and occipital compact setose warts. Maxillary palps filiform, covered by long setae; maxillary palp formula VI-IV-(II, V)-I-III. Scapes rounded, about half as long as head; pedicels 2/5ths as long as scapes. Two pairs pronotal warts present: pair of large dorsal, transverse ovoid warts, widely separated mesally by deep cleft; pair of small, rounded warts located deep laterally, visible in lateral view. Pair of mesoscutal, almost indiscernible, diffuse warts present in longitudinal lines running along entire mesoscutum. Pair of mesoscutellar warts forming ovoid, obliquely located, more strongly pigmented area with 5 to 6 setal alveoli. Large, rounded setose warts located proximally, above articulation of cervical sclerite on proepisternum, larger than setal wart on precoxale. Cervix with large, compact setal warts present mainly on membranous part, touching anterior arm of cervical sclerites. Lateral cervical sclerites forming narrow anterior arm articulating anteriorly to back of head with occipital condyle above posterior tentorial pits, fusing to posterior cervical sclerites. Posterior cervical sclerites forming narrow, elongated plates reaching prothoracic episternum, articulating with weakly sclerotized anteromedian band of prothoracic eusternum by thin, ventral intercervical sclerites. Legs with symmetrical claws; spur formula 2, 4, 2; forelegs with posteroapical spur 2 times longer than anteroapical spur; midleg anteroapical and anterosubapical spurs 1/4th as long as other spurs; hind leg apical spurs equally long; hind leg tibiae with comb of long hairs. Forewings: length 11.0 mm; membrane brown with light patches along crossveins; light dotted; Sc hypertrophied with crossvein sc-r; R1 confluent with, or recurrent into, R2 well before C; base of discoidal cell located proximally of mid-length of wing; forks I, II, III, IV, V present; crossveins h, sc-r, s, r-m, m, m-cu, cu1, cu2 and cu-a present; crossvein r absent; postanal vein absent. Hind wings: R1 meeting R2; forks I, II, III, V present; fork I longer than fork II.

Male genitalia. Abdominal segment IX fused annularly, without longitudinal groove separating dorsal, mesal and ventral parts; tergum half as long as venter; anterior margins of segment IX ventrally convex in lateral view, more developed ventrally; posterior margins forming triangular plate of apical lobes; antecosta developed, more on anteroventral half, forming narrow marginal rim, equally thin on dorsal half, without conspicuous external groove of antecostal suture; tergum IX with narrow triangular mesal keel in dorsal view, forming continuation of sharp dorsal keel of segment X; with lateral, rounded projections, overhanging basis of preanal appendages; in dorsal view, tergite with rounded mesal lobe on anterior margin, acrotergite, and anterior margin of venter IX; spine row on posterolateral margins forming setal patches behind triangular apical lobe and on ventropleural region. Intersegmental depression between segment IX and segment X filled. Segment X about as long as gonocoxites, forming broad hood with blunt apex; more chitinized band running from apex to base of gonocoxites on lower ventral submargins absent. Apicoventral setose lobes forming setose surfaces before and at apex. Apicodorsal setose lobes with few tiny setae above middle of segment X. Dorsal interlobular gap sharp and deeply triangular. Preanal appendages longer than segment X; almost parallel-sided, straight in lateral view; in dorsal view straight, with weak constriction at middle, narrowing apicad. Gonocoxites without harpago, broad on basal 2/3rds in lateral view; straight, with mesad directed apices in lateral view. Phallic apparatus straight; narrow in lateral view; broad in ventral view, with elongated, sclerotized ventral apical lobe; endotheca and phallicata membranous; phallotremal sclerites U-shaped in ventral view, with bifid apices; ejaculatory duct straight in lateral and ventral view.

Holotype male: VIETNAM: Quang Tri Province: Huong Hoa District, Huong Hoa Nature Reserve, near Cup Village , 400 m, loc. No. 92, centered at 16 ° 56’15’’N, 106 ° 34’52’’E, 7–10.xi.2007, at light [G. Csorba] — ( OPC). GoogleMaps

Distribution: Vietnam.

Etymology: Csorbai, named after the collector of the species, Gábor Csorba.

Darwin Core Archive (for parent article) View in SIBiLS Plain XML RDF