Mecynostomella sigma, Johanson, 2003

Johanson, Kjell Arne, 2003, Revision of the New Caledonian genus Mecynostomella (Trichoptera, Kokiriidae), Zootaxa 270 (1), pp. 1-24 : 17-18

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.5014383

persistent identifier

https://treatment.plazi.org/id/03F5102F-656B-1644-FE9A-A913145EFC6F

treatment provided by

Felipe

scientific name

Mecynostomella sigma
status

sp. nov.

Mecynostomella sigma sp.n.

( Figs 41­45 View FIGURES 41­45 , 53 View FIGURES 53­54 )

Material examined: Male holotype: E Col d'Amieu Forestry Station, 320 m, 17.vi.1971 (#26) [J.D. Holloway] ( ROM, alcohol) .

Etymology: sigma , from the Latin letter S ( sigma ), referring to the shape of the gonocoxite. To be treated as a noun in apposition.

Diagnosis: M. sigma has a pale area in the forewings as in hollowayi . In sigma , the lateral branches are sub­straight and short, and the median branches proceed the lateral branch apices.

Male.

Colors faded. Antennal flagellum broken.

Thorax: Pronotum with few dorsolateral, stout, dark brownish setae confined to large, distinct warts.

Wings: Forewing length 11.3 mm (n=1), hind wing length 9.8 mm (n=1). Forewings pale brownish; distinct pale area between Cu and A as in hollowayi (in Fig. 6 View FIGURES 6­14 ). Hind wing pale grey. Venation as described for genus

Genitalia ( Figs 41­45 View FIGURES 41­45 ): Segment IX, lateral view ( Fig. 41 View FIGURES 41­45 ), about 2.1x higher than long; anterior part shallowly produced, margin smoothly rounded; dorsal margin rounded; posteroventral margin with wide, anteriorly sub­straight incision ( Fig. 43 View FIGURES 41­45 ). Segment X simple; in dorsal view ( Fig. 42 View FIGURES 41­45 ), central branch nearly parallel­sided at distal half; in lateral view ( Fig. 41 View FIGURES 41­45 ), nearly parallel­sided proximally, tapers distally; dorsal margin bent ventrally at mid­way; apex covered by setae, few setae present on lateral margin; segment X nearly 2x longer than high ( Fig. 41 View FIGURES 41­45 ); apex narrowly rounded in lateral view, deeply incised in dorsal view ( Fig. 42 View FIGURES 41­45 ). Lateral branch length half the central branch length, pointed, sub­straight ( Fig. 41 View FIGURES 41­45 ); slightly converging in dorsal view ( Fig. 42 View FIGURES 41­45 ); proximal setae form continuous band with setae on segment IX. Median branch, lateral view ( Fig. 41 View FIGURES 41­45 ), large, proceeds lateral branches; with setae on ventral margin; in dorsal view ( Fig. 42 View FIGURES 41­45 ), sharply pointed, visible between lateral and central branches. Gonocoxite, lateral view ( Fig. 41 View FIGURES 41­45 ), curving slightly dorsally along its length, apex produced dorsad; dorsal margin sigmoid, ventral margin slightly convex ( Fig. 41 View FIGURES 41­45 ); slender sub­apical part nearly 0.6x as high as proximal part; in ventral view ( Fig. 43 View FIGURES 41­45 ), sub­straight, oriented posteriad along its length, apex slightly dilated; covered by setae except on proximal part. Phallus simple; phallobase slightly longer than three­quarts the height of segment IX ( Fig. 44 View FIGURES 41­45 ); endotheca produced dorsally in dorsal opening starting distally on phallus, without spines; in ventral view ( Fig. 45 View FIGURES 41­45 ), lateral incisions at proximal part located opposite to margin of anterior phallus opening.

Female unknown.

ROM

Royal Ontario Museum

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