Mecynostomella brevis, Johanson, 2003

Johanson, Kjell Arne, 2003, Revision of the New Caledonian genus Mecynostomella (Trichoptera, Kokiriidae), Zootaxa 270 (1), pp. 1-24 : 10-12

publication ID

https://doi.org/ 10.11646/zootaxa.270.1.1

publication LSID

lsid:zoobank.org:pub:F3A8692C-40EF-462D-BC00-235F008A4798

DOI

https://doi.org/10.5281/zenodo.5014377

persistent identifier

https://treatment.plazi.org/id/03F5102F-6572-165E-FE9A-A8A01446FB9F

treatment provided by

Felipe

scientific name

Mecynostomella brevis
status

sp. nov.

Mecynostomella brevis sp.n.

( Figs 9 View FIGURES 6­14 , 23­27 View FIGURES 23­27 , 54 View FIGURES 53­54 )

Material examined: Male holotype: stream, Val de l'Hermitage, 1 km NE Terr. Route 1, 76 m, 10.x.1972 (N34) [W.L. & J.G. Peters] ( ROM, alcohol). 1 male paratype: Trib. of Karionan Riv., 5 km NW Païta, 122 m (N54), 14.xi.1972 [W.L. & J. G. Peters] ( NRM, alcohol) .

Etymology: brevis , from Latin, meaning short, referring to the lateral branch of the genitalia being smaller than that of Mecynostomella spinosa . To be treated as a noun in apposition.

Diagnosis: This species can be distinguished from hollowayi , sigma , flinti and fusca by the forewings with no area of modified sensillae; these sensillae are also lacking in caledonia and spinosa . Unique characters include a very shallowly incised posteroventral margin of the segment IX, a median branch located ventrally on the lateral branch, and a group of spines on the ventral margin of the phallic endotheca.

Male.

Colors faded. Antennal flagellum with 38 flagellomeres.

Thorax: Pronotum with setae confined to large warts.

Wings ( Fig. 9 View FIGURES 6­14 ): Forewing length 9.6 mm (N=1), greyish­black, hind wing 8.4 mm (n=1), grey. Venation as described for genus.

Genitalia ( Figs 23­27 View FIGURES 23­27 ): Segment IX, lateral view ( Fig. 23 View FIGURES 23­27 ), about 2.3x higher than long; anterior margin shallowly ellipsoidal, dorsally pointed; ventral margin shallowly and widely incised posteriorly ( Fig. 25 View FIGURES 23­27 ). Segment X with simple central branch almost parallel­sided at distal half in dorsal view ( Fig. 24 View FIGURES 23­27 ); in lateral view ( Fig. 23 View FIGURES 23­27 ), almost parallelsided along proximal half and strongly tapered distally; dorsal margin bent ventrally at mid­length; with few setae on distal half; nearly 2x longer than high ( Fig. 23 View FIGURES 23­27 ); apex narrowly rounded in lateral view, slightly incised in dorsal view ( Fig. 24 View FIGURES 23­27 ); lateral branch nearly as long as central branch; tubular, sub­straight in lateral ( Fig. 23 View FIGURES 23­27 ) and dorsal ( Fig. 24 View FIGURES 23­27 ) views; short setae confined to apex and ventral sub­apical margin; median branch, lateral view ( Fig. 23 View FIGURES 23­27 ), large, semicircular, about as long as lateral branch; in dorsal view ( Fig. 24 View FIGURES 23­27 ), oriented posteriorly, visible between central and lateral branches, pointed. Gonocoxite, lateral view ( Fig. 23 View FIGURES 23­27 ), generally curving dorsally along its length; dorsal margin concave, ventral margin sub­straight, apex produced dorsally; slender sub­apical part about 0.8x as high as proximal part; in ventral view ( Fig. 25 View FIGURES 23­27 ) oriented posteriad along its length; covered by setae along its length but most numerous at apex. Phallus simple; phallobase, lateral view ( Fig. 26 View FIGURES 23­27 ), length about three­quarts the height of segment IX; endotheca produced dorsally from distal half on dorsal side, with small spines on ventral margin; in ventral view ( Fig. 27 View FIGURES 23­27 ), lateral incisions at proximal part located posteriorly of anterior margin of phallus opening.

Female: unknown.

ROM

Royal Ontario Museum

NRM

Swedish Museum of Natural History - Zoological Collections

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