Ganonema malickyi, 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 : 8-10

Ganonema malickyi , new species

Figs 1–6

This large-sized, dark-brown species lacks a forewing pattern. It is similar to Ganonema rong , new species from Vietnam, from which it is separated by the darker, almost greyish, dark-brown forewing colour. The preanal appendages are longer in lateral view, and exceeding the posterior apex of tergite IX. Segment X lacks lateral flanks but is supported by a pair of lateral humps on the middle in dorsal view. The gonocoxites have heavily setose subapical outgrowths and sub-basal lobes. The most significant distinguishing character of this species is the narrow forewings.

Male (pinned). Body large, dark greyish brown; legs, antennae and palps lighter; forewing membrane without pattern. Head rectangular in dorsal view, almost as long as broad. Ocelli absent. Tentorium invisible in uncleared holotype. Facial groove pattern modified by plate-like, transverse flange or rim of frontal sclerite between anterior tentorial pits; lines separating frons and clypeus manifested by frontal transverse rim; frontogenal vertical grooves oblique, stretching almost horizontally to antennifer pivots on ventral antennal grooves; dorsal continuations of anterior tentorial arms from anterior tentorial pits visible on cleared head as internal folds or frontogenal septa reaching circumantennal sclerites at antennifer pivots; clypeogenal vertical grooves located ventral of anterior tentorial pits short, running slightly mesad; highly visible pattern of plate-like flange and frontogenal and clypeogenal sutures forming complex of anterior tentorial arms (frontogenal septa); small, nearly invisible subantennal grooves obliquely sinuous between large frontogenal compact warts and palpifers, proximal articulation of palpi on stipes; subocular groove not visible; short, indistinct frontal grooves present between antennae on constricted frons, joining vertexal medioantennal compact setose wart. Vertexal groove pattern more reduced; large, anteriorly, rounded elevation dominating anterior half of vertex, reaching interantennal area and delineated laterally by extremely enlarged membranous antennal sockets encircled by antennal grooves. Enlarged sockets with corrugated or granulous surface near large frontogenal compact setose wart; stem of epicranial groove (coronal groove) vestigial; dorsomesal ridge or vestigium of coronal groove visible in middle of posterior end of vertex surrounded by less pigmented area; occipitopostgenal groove directed anterad to lateral margin of very large occipital compact setal warts. Labrum heartshaped with rounded apex freely hanging, sparsely setose; anterior basal part with pair of rounded compact setose warts, labral setae, or moustache (sensu Prather 2002). Mandibles well-developed, slightly pigmented, located laterally along labrum; lacinia curving mesad, bearing few setae. Frontal setal warts and frontal interantennal warts absent; frons appearing more-pigmented, bordered laterally by enlarged, less-pigmented antennal sockets. Pair of large, subtriangular frontogenal compact setal warts present on posterior pregenae at obliquely to horizontally oriented frontogenal groove, stretching into clypeogenal area. Pronounced and dominating pair of setal warts forming compact warts visible on face together with labral moustache. Anterior, rounded elevation on vertex bearing pair of vertexal medioantennal compact, setose, anterior warts on top, separated by anteromesal furrow. Pair of lateroantennal, compact setal warts on vertex visible, rounded, and transversal. Large central setal area of diffuse setae on vertex forming pair of large, horizontally elongating, compact setose warts; obliquely oriented, ovoid pair of large occipital compact setose warts dominating posterior half of vertex; small pair of narrow, elongate postgenal compact warts visible between posterior section of ocular grooves and large occipital compact setose wart encircling eyes ventrally. Pair of small lobes with compact setose warts present in continuation of dorsomesal ridge or vestigium of coronal grooves, separated by postoccipital groove.

Maxillary palps 5-segmented, palp formula (I, IV, V)-III-II, filiform, densely covered by long setae. Antennal scapes each slightly longer than broad, half as long as head, 3 times longer than its pedicel. Two pairs of pronotal setal warts present: large dorsal pair transverse, slightly elongate, each located on elevated hump, widely separated mesally; second pair of smaller, rounded setal warts located more laterally, clearly visible only in lateral view. One pair of diffuse mesoscutal warts in longitudinal bands extending entire length of mesoscutum, composed of very densely packed setae with small alveoli and some larger setae arranged in double or triple rows. These bands of setal warts continuing onto quadrate mesoscutellum. Large, rounded setal warts located proximally above articulation of cervical sclerite on proepisternum, larger than setal wart on each precoxale. Very large, elongate, compact setal wart present on each side mostly on membranous part of cervix, touching anterior arm of cervical sclerite. Lateral cervical sclerites distinctively formed; composed of narrow anterior arm articulating anteriorly to back of head with occipital condyle above posterior tentorial pits, fused to posterior cervical sclerites. Posterior cervical sclerites each forming narrow plate broadened posteriorly and reaching prothoracic episternum, articulating to weakly sclerotized anteromedian band of prothoracic eusternum by narrow, ventral intercervical sclerites. Leg claws symmetrical; spur formula 2, 4, 4; foreleg spurs similar, midleg anterior spurs half as long as posterior spurs; each hind leg anteroapical spur half as long as other hind leg spurs. Forewings: length 18.0 mm; membrane uniformly greyish brown, without pattern. Forewing R1 recurrent into R2 before costal margin; basis of discoidal cell located basally of midpoint of wing; forks I, II, III, IV, V present; crossveins h, sc-r, s, r-m, m, m-cu, cu1, and cu2 present; postanal vein absent. Hins wings: R1 running into R2; forks I, II, III, V present; fork I longer than fork II.

Male genitalia. Segment IX smoothly glabrous, covered by acanthae, except apical lobes and ventropleural faces each with setose surfaces; fused annularly, without longitudinal grooves laterally separating dorsal and ventral parts; tergum slightly longer than venter, dorsum produced into rounded protrusion in lateral view ( Fig. 2 ); anterior margin of segment IX regularly straight, vertical; antecosta weakly developed, forming narrow, marginal rim, without clearly visible external antecostal suture; apical lobe on each posterolateral margin subtriangular exactly at midheight of segment; suture-like rim present on posterolateral margins of segment IX starting from below apical lobes; spine rows on posterior ventrolateral margins of segment IX absent; in dorsal view ( Fig. 3 ) tergum IX clearly triangular, with mesal suture running on ridge and diverging at apical end of tergum IX; anterior margin of tergum IX forming less pigmented acrotergite. Intersegmental depression between segment IX and segment X rounded stepwise. Segment X shorter than gonocoxites, with apex curving dorsad in lateral view ( Fig. 2 ); in dorsal view ( Fig. 3 ) elongate and slightly broader at midpoint due to presence of lateral humps; apicoventral setose lobes reduced to setose surfaces below dorsad- curving apices; subapicodorsolateral setose lobes forming sparsely setose surfaces of subdorsal humps at midpoint of segment X; apicomesal interlobular gap very narrow, deeply cleft, slightly wider basally. Preanal appendages long and slender, elongate-oval in lateral and dorsal views. Gonocoxites each 1-segmented, without harpago, forming arch varying in width along its length in ventral ( Fig. 4 ) and lateral ( Fig. 2 ) views; very pronounced subapicolateral setose outgrowth and subbasoventromesal setose lobe present. Phallic apparatus forming straight tube; phallotheca more developed ventrally, its ventral apex projecting ventrad to excised apex and its lateral apices projecting as triangular wings; phallotremal sclerite small, located almost in middle of phallotheca when in retracted condition; apical phallicata membranous.

Holotype male: THAILAND: Chiang Mai, Sirifum waterfall, 18 ° 48.9 ’ N, 98 ° 53.0 ’ E, 20.v.1996 [T.W. Donelly] — (in alcohol, NMNH).

Distribution: Thailand.

Etymology: malickyi , named for Dr. Hans Malicky, in recognition of his contributions to caddisfly taxonomy, particularly for his invaluable assistance and encouragement throughout this study.

Figures

FIGURES 1–6. Ganonema malickyi, new species, holotype. 1 — right forewing; 2 — genitalia, lateral; 3 — genitalia, dorsal; 4 — gonocoxite, ventral; 5 — phallus, lateral; 6 — phallus, ventral.