Neotrichia flinti Keth, 2021

Neto, Jaime De Liege Gama, Ribeiro, José Moacir Ferreira & Passos, Mahedy Araujo Bastos, 2021, The genus Neotrichia Morton 1905 (Trichoptera: Hydroptilidae) in Pará state Northern Brazil: New species and an unpublished species made available, Zootaxa 5082 (2), pp. 118-128 : 125-127

Neotrichia flinti Keth sp. nov.

( Figs 6A–6D )

Neotrichia flinti Keth 2002, pp 152–153 , figs 88, 89, 167, 173, nomen nudum.

This species was recognized and described by Dr Andrew C. Keth (2002) in his unpublished PhD dissertation based on specimens from Venezuela. We contacted Dr Keth and he authorized us to include his description of this species in our publication. Figures 6A–6D were prepared from our specimens from Brazil (Pará State).

Diagnosis. The presence of the following characters clearly places this species in the Neotrichia aserradera Group: 1) serrate, rectangular inferior appendages, 2) long, sclerotized phallus spikes, and 3) highly reduced tenth segment. This species is similar to N. aserradera but is diagnosable using the following combination of characters: 1) segment VIII lacking apicodorsal setal lobes, 2) inferior appendage lacking dorsal projection, and 3) segment X distinct from, but not projecting beyond segment IX. Although one or more of these individual characters may occur in other Neotrichia species , Neotrichia flinti is the only species to exhibit the unique combination of all of these characters.” ( Keth 2002)

Description. Male: Length 1.7–2.0 mm. 18 antennal segments. Brown in alcohol.Abdominal segments VII and VIII annular. Segment IX arising from within segments VII and VIII, anterior margin angular, producing a long, slender, finger-like extension; posterior margin rounded, sclerotized. Segment X fused with dorsum of segment IX, short, uniform, and nearly blunt with only slight dorsoapical angularity in lateral view; in dorsal view covered with field of stout setae, narrow and uniform to emarginate apex producing slight, rounded lobes from apicolateral comers.” ( Keth 2002)

Male Genitalia. Subgenital plate tapered and slightly curved to acute, rounded apex with short, tongue-like extension in lateral view; in ventral view nearly uniform to mesally-rounded apex with lobate apicolateral comers producing paired setae. Inferior appendage nearly rectangular and slightly sclerous with rounded apex appearing somewhat bilobed in lateral view; in ventral view tapered with rounded margins, apex hooked slightly mesad and appearing somewhat claw-like with multiple rows of stout setal serrations along mesal margins. Bracteoles basally slender, broadened to blunt, spatulate apex in lateral view; in ventral view short, slender and slightly tapered to acute, rounded apices. Phallus long and narrow with preapical constriction giving rise to slender, round paramere; apex long, slender, and finger-like with paired sclerotized rods along ventral surface; one rod nearly equal in length to phallus apex, other rod 14 that length and hooked sharply dorsad at extreme tip; ejaculatory duct uniform to phallus tip, non-protruding.” ( Keth 2002)

Material Examined. Holotype. VENEZUELA: T.F.A., Rio Cataniapo , 10 km S. Puerto Ayacucho. 9 March 1984. O.S. Flint, Jr., 1 male; good condition, alcohol ( PSU [= Pennsylvania State University, University Park, Pennsylvania]).” ( Keth 2002)

Paratypes. VENEZUELA: Same locality. 10 males, good condition, alcohol ( PSU). 10 males, good condtion, alcohol ( NMNH [= National Museum of Natural History, Smithsonian Institution, Washington, D.C., USA]).” ( Keth 2002)

Other Material. VENEZUELA: Same locality. 36 males ( PSU)” ( Keth 2002) . BRAZIL: Pará: Parauapebas municipality, Serra dos Carajás, small order stream, 6°2’24.828”S, 50°17’38.184”W, 7–9 Aug. 2018; 1 male. Pennsylvania light trap, J.L. Gama Neto & M.J. Ferreira Ribeiro, cols. (alcohol; MPEG) .

Distribution. Brazil (Pará State), Venezuela.

Etymology. Named for Oliver S. Flint, Jr. in recognition of his life-long contributions to caddisfly taxonomy.” ( Keth 2002)

Figures

FIGURE 6. Neotrichia flinti Keth sp. nov., male genitalia, specimen from Brazil (Pará State). 6A, left lateral; 6B, ventral; 6C, dorsal; 6D, phallus, left lateral. Abbreviations: br = bracteole (paired), ed = ejaculatory duct, ia = inferior appendage (paired), pr = paramere, sg = subgenital plate.