Madenemura descarpentriesi Paulian, 1959

Zwick, Peter, 2015, Notes on Madagascan Stoneflies (Plecoptera: Notonemouridae), Zootaxa 4059 (1), pp. 169-180 : 176-177

Madenemura descarpentriesi Paulian, 1959

( Figs. 10–12 , 20, 21 )

Material studied. Madagascar, Ranomafana National Pk., Mariavaratra stream, 21°15.629'S, 47°25.149'E; emergence trap, J. Benstead: 15.11.1997, 1♀; 25.11.1997, 2♀; 16.12.1997, 1♀; 30.8.1998, 1♂; 6.10.1998, 1♀; 13.10.1998, 1♀; 15.11.1998, 1♂; 21.12.1998, 1♀ ( USNM).

MADAGASCAR: Antsiranana R.N.I. de Marojejy 10.5km NW Manantenina XI.6 –12.1996 1,625m Eric L. Quinter along tributary at head Andranomifototra R. 14°26.4'S, 49°44.5'E Malaise traps, 30♂, 20♀; same locality, printed date deleted, manual addition: XI.12–Xi.19: 36♂, 25♀. MADAGASCAR: Antsiranana R.N.I. de Marojejy 10.5km NW Manantenina XI.6 –12.1996 1,625m Eric L. Quinter 14°26.2'S, 49°44.5'E Malaise traps; printed date deleted, manual addition: XI.3–XI.19: 30♂, 33♀. E1000-3 P1011 Madagascar Bas. Lokoho Riv. Andranomifotatra Loc. Marojejy Camp 3 49°44'56''E, 14°26'38''S 27.11.1999 Doumenq,E. \ Camp 3 A8 Malaise: 3♂, 2♀ ( USNM). P0270 7/03/95 Prospection Bassin: Mangoro Riv.: Pt. Aff. Ankenheny Local: Réserve Manjakatompo Ankaratra 19:21:13S 47:18:56E, 1♂ with associated exuviae, 1 mature last instar ♀; P0271 8/03/95 Prospection Bassin: Mangoro Riv.: Affluent non nommé Local: Réserve Manjakatompo Ankaratra 19:21:00S 47:19:11E, 1♀; P0272 8/ 03/95 Prospection Bassin: Mangoro Riv.: Affluent non nommé Local: Réserve Manjakatompo Ankaratra 19:20:50S 47:18:49E, 1♀; P0269 6/03/95 Piège lumineux soir Bassin: Mangoro Riv: aff. Ankenheny Local: Manjakatompo Ankaratra 19:21:23S 47:18:46E, 1♂; P0271 8/03/95 Piège lumineux soir Bassin: Mangoro Riv.: Affluent non nommé Local: Réserve Manjakatompo Ankaratra 19:21:00S; 47:19:11E, 1♀; P0357 29/03/95 Piège lumineux soir Bassin: Antongombato Riv. Makis Local: Camp Base WWF 12:31:40S 49:10:09E, 1♀ (all MZL, received on slides).

Last instar larvae, presumed M. descarpentriesi : P0189 Prospection 27/03/94 Bassin: Ambre 1 Ri: Pte cascade Local: Camp base WWF, 1 mature last instar ♀; P0214 Prospection 17/04/94 Bassin: NAMORONA Riv: 5km en Amont de Ranomafana Local: Ranomafana MADAGASCAR, 1L; P0271 8/03/95 Prospection Bassin: Mangoro Riv.: Affluent non nommé Local: Réserve Manjakatompo Ankaratra 19:21:00S 47:19:11E, 1L; P0272 8/03/95 Prospection Bassin: Mangoro Riv.: Affluent non nommé Local: Réserve Manjakatompo Ankaratra 19:20:50S 47:18:49E, 1L; P0539 Prospection 24/11/95 Bassin: MANAMPANIHY Riv: Andranohela Local: Camp 1 Andohahela MADAGASCAR Lat:24:36:45S Long:46:45:34E, 3L; P0543 Prospection 26/11/95 MANAMPANIHY Riv: Andranohela Local: Camp II Andohahela MADAGASCAR Lat:24:35:47S Long:46:44:25E, 6L ( MZL).

Habitus. As for the genus; WL of males 6.0– 7.3mm, of females 7.8–9.4mm.

Male. The projecting front of the epiproct baseplate deeply divides T10 into hemitergites. The rear part of the baseplate narrows in a nearly straight line, the caudal margin is rounded with indistinct caudolateral corners and is barely wider than the epiproct. In dorsal view the epiproct is transversely oval. It is hollow and largely conceales the granules which form a low narrow hump with rounded front limit on the caudal part of the baseplate. The narrow peduncle of the epiprocts is seen from below, or by transparency ( Fig. 10 ). In side view, the epiproct is relatively flat. The granules on the caudal part of the baseplate appear as a little cone ( Fig. 12 ).

Paraproct body consisting of the two lateral blades attached to a U-shaped sclerite, there is no median tubular structure. In spread-out condition on slides ( Fig. 11 ) each blade is initially wide, narrows caudally and ends in a soft narrow apex. Measured from the rear edge of the curved sclerite to the tip each blade is about 4 times as long as its maximum width. The medial edge of each blade is curved, the outer almost straight. Outer face of each blade with numerous large circular sensilla. In side view they appear like small cupules. The paraproct body is barely shorter than the ventral vesicle.

Female. The ovipositor extends to the tip of the cerci ( Figs 20, 21 ). The subgenital plate of S8 grows narrower over most of its length, it is finely pilose. The tip with two large terminal setae is softer than the rest and often slightly retracted. The caudal prolongation of S9 is narrower, its sparse pilosity is barely detectable.

Notes. Recognized from the description by the characteristic considerable length of the ovipositor. Ninety-five percent of the 183 specimens in the Malaise traps near Manantenina belong to M. descarpentriesi , 55% were males.

Figures

FIGURES 10 – 17, Madenemura spp., males. 10 – 12, M. descarpentriesi: 10, central part of T 10 with epiproct baseplate and epiproct, cerci diagrammatic; 11, dorsoventral view of slide-mounted paraproct body; 12, apex of baseplate and epiproct hook, lateral view. 13, 14, M. culminalis: 13, central part of T 10 with epiproct baseplate and epiproct, cerci diagrammatic; 14, dorsoventral view of slide-mounted paraproct body; 15, apex of baseplate and epiproct hook, lateral view. 16, 17, Madenemura sp., perhaps sp. 3 of Paulian (1959): 16, abdominal tip, lateral, semidiagrammatic, paraproct body shaded, arrow points at raised antecosta 10, inset below shows caudal edge of T 10 in dorsal view; 17, epiproct, lateral. 12 and 15 – 17 not to scale.

FIGURES 18 – 24, Madenemura spp., female abdominal tips, in lateral (even numbers) and ventral (uneven numbers) view; after photographs, semidiagrammatic: 18, 19: M. andringitrensis. 20, 21: M. descarpentriesi. 22, 23: M. culminalis; 24: M. pauliani sp. n. (holotype). Same scale for all.