Anisocentropus (Anisocentropus) hannahae, 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 : 25-28

Anisocentropus (Anisocentropus) hannahae , new species

Figs 44–48

This medium-sized species has hyaline-rich forewings, otherwise without colour and pattern on the forewings and hind wings. The body is also less pigmented than other species in the genus. The 2 female paratypes have more strongly pigmented, brownish bodies, but their wings are hyaline. Wing veins are hyaline, with only sparse, light gray-cinereus setae. The length of the median keel on tergum IX is medium-sized, between that of A. fridae and A. fijianus . The dorsal interlobular gap is filled, and only a shallow sinus is present, formed by a pair of setose humps visible in dorsal view.

Male (in alcohol). Body medium sized, ochraceous; appendages pale yellow in alcohol; wing membrane hyaline. Head rectangular in dorsal view, almost as long as broad. Ocelli absent. Tentorium not visible on uncleared head. Facial groove pattern modified by plate-like flange or rim connecting anterior tentorial pits, forming theoretical line separating frons and clypeus; frontogenal vertical grooves forming oblique, dorsal continuations from anterior tentorial pits, almost horizontally merging with broad antennal grooves; clypeogenal vertical grooves located ventrally of anterior tentorial pits, short, running slightly mesoventrad; conspicuous pattern of plate-like flanges and frontogenal and clypeogenal sutures forming complex with anterior tentorial arms, frontogenal septum; small, inconspicuous subantennal grooves sinuous, running almost horizontally between large frontogenal compact warts and palpifers, forming proximal articulation of palpi on stipes; subocular grooves not visible; very short, pronounced frontal groove present between antennae, joining vertexal medioantennal compact setose warts. Vertexal groove pattern more reduced; large anterad-directed, rounded elevation dominating anterior half of vertex, reaching interantennal area, delineated laterally by enlarged membranous antennal sockets, enlarged sockets with corrugated or granulous surface near frontogenal compact setose warts; stem of epicranial groove (coronal groove) vestigial; usually permanent antennal and ocular grooves accompanied by occipito-postgenal grooves, partly merging anterally with, or tangential to very large occipital compact setal warts. Labrum vertically long, quadrangular, with narrowing, rounded apex, freely hanging, sparsely setose. Mandibles long, slightly pigmented, oriented laterally along beside each labrum, laciniae narrow, elongated, bearing few setae. Frontal setal warts absent on face, frontal interantennal warts absent due to forward-directed vertexal elevation. Pair of large, nearly triangular frontogenal compact setal warts present on posterior pregenae, angled obliquely or almost horizontally from frontogenal grooves; setal warts dominating face. Forward directed, rounded triangular elevation on vertex bearing anteriorly fused vertexal medioantennal compact setose wart, located anteriorly on head; vertexal lateroantennal compact setal warts absent; antennal socket enlarged; pair of small, rounded vertexal ocellar compact setose warts and smaller pair of vertexal medioocellar diffuse setose warts visible, with 1 or 2 setae in middle of vertex; obliquely located pair of large, ovoid occipital compact setose warts dominating posterior half of vertex; small pair of postgenal compact warts visible posteriorly between ocular grooves and large occipital compact setose warts. Maxillary palps filiform, palp formula II-IV-VI-V-I-III. Antennal scapes rounded, long, 1/3rd as long as head; pedicels 2/5ths as long as scapes. Ovoid setose warts, located proximally above articulation of cervical sclerites on proepisternum, larger than setal warts on precoxales. Large, compact setal warts present mainly on membranous part of cervix, touching anterior arms of cervical sclerites. Lateral cervical sclerites forming narrow anterior arms articulating anteriorly to back of head with occipital condyle above posterior tentorial pits, and fusing with posterior cervical sclerites; posterior cervical sclerites forming narrow, elongated plates reaching prothoracic episternum, articulating to weakly sclerotized anteromedian band of prothoracic eusternum by thin ventral intercervical sclerites. Two pairs of pronotal warts present; 1 large-sized dorsal pair of ovoid, transversely elongated warts separated mesally by broad fissura; 1 pair small, ovoid warts located deeply laterally, and visible only in lateral view. One pair of mesoscutal, diffused warts present, arranged in longitudinal lines along entire mesoscutum, composed mostly of single, rarely double, setae with pale alveoli or setal thecae, conspicuous on ochraceous background. Pair of mesoscutellar warts forming small, less-pigmented rounded areas, each with 5 to 6 setal alveoli. Legs with symmetrical claws; spur formula 2, 4, 3; foreleg spurs equal; midleg anteroapical spurs each 1/6th as long as its posteroapical spur, anterior subapical spurs each 1/3rd as long as its posterior subapical spur; hind leg anteroapical spurs each 1/3rd as long as its posteroapical spur. Forewings: length 8.0 mm; membrane and veins hyaline; covered by sparse cinereus setae; R1 separate from C along its length; crossvein r present near wing margin; base of discoidal cell located at midpoint of wing; forks I, II, III, IV, V present; crossveins h, sc -r, r, s, r -m, m, m -cu, and cu2 present, crossveins cu1 and cu-a absent, postanal vein absent; nygma and thyridium darkly pigmented, large. 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 and ventral parts; tergum longer than venter, due to presence of elongated mesal keel; venter produced, narrowing in lateral view; anterlateral margins of segment IX triangular, with apex slightly ventral of midheight; posterior margins each with well-developed lateral flank between its preanal appendage and its gonocoxite and large triangular plate with apex at ventral base of its gonocoxite; apical half of flank glabrous, less pigmented, slightly transparent. Antecosta weakly developed, forming narrow, marginal rim, equally thin along entire margin, without conspicuous external groove of antecostal suture; tergum IX with long protruding mesal keel; in dorsal view long, sharply triangular; spine row absent on posterior margin of segment IX; segment IX bare, glabrous, except with small dorsopleural, large ventropleural, and ventral setose areas. Intersegmental depression between terga IX and X deep, sharply triangular in lateral view, due to presence of long protruding mesal keel. Segment X longer than gonocoxites, as long as preanal appendages, forming broad hood with ventrad- and laterad-directed apical rim characterised by sinuous excavations visible only in dorsal view, excavations forming tooth-like pattern on ventrad-curving margins, each apex with 2 teeth ( Fig. 45 ); apicoventral setose lobes reduced to setose surfaces before apex; apicodorsal setose lobes forming sparsely setose surfaces above middle of segment X. Dorsal interlobular gap filled; shallow sinus visible, surrounded by pair of setose humps. Preanal appendages digitiform in lateral view, clavate in dorsal view; broadened slightly subapically, narrow basally. Gonocoxites without harpagones, triangular in lateral view, elongated, each with mesal margin almost straight in ventral view, its apex narrowed; 2–3 stout setae located on each gonocoxite just beyond middle corner of mesal surface. Phallic apparatus forming curving tube, dorsally convex, ventrally concave, elongated; apicoventral lobe sclerotized; part of phallicata visible above ventral lobe while retracted. Phallotremal sclerite visible in lateral view, forming large, compact structure in membranous phallicata; phallotremal sclerite complex in ventral view clearly V-shaped with straight ends; slender ejaculatory duct reaching phallotremal sclerite complex, sinuous in lateral view, straight in ventral view.

Holotype male: FIJI ISLANDS: Vanua Levu : Macuata Province, Dogotuki, 2.5 km E of Nasavu River, 7.vii.2003, Malaise trap [M. Irwin, E. Schlinger & M. Tokota’a], 16.2519 ° S, 179.7833 ° E ─ ( BMH)

Paratypes: same data as holotype ─ 2 females allotypes ( BMH) .

Distribution: Fiji Islands.

Etymology: Hannahae, named after Hannah Svare Johanson, the younger daughter of one of the authors of this paper (KAJ).

Figures

FIGURES 44–48. Anisocentropus hannahae, new species, holotype. 44 — genitalia, lateral; 45 — genitalia, dorsal; 46 — genitalia, ventral; 47 — phallus, lateral; 48 — phalus, ventral.