Madenemura culminalis Paulian, 1951

Zwick, Peter, 2015, Notes on Madagascan Stoneflies (Plecoptera: Notonemouridae), Zootaxa 4059 (1), pp. 169-180 : 177-178

Madenemura culminalis Paulian, 1951

( Figs. 2 , 13–17 , 22, 23 )

=? Madenemura sp. 3 of Paulian, 1959

Material studied. Madagascar, Ranomafana National Pk., Mariavaratra stream, 2115.629'S, 4725.149'E; emergence trap, J.Benstead: 25.11.1997, 2♂; 16.12.1997, 1♂; 16.10.1998, 1♂; 27.11.1998, 1♂; 1♂: Madagascar, Prov. Fianarantsoa, 7km W Ranomanfana 900m, 14.– 19.03.1990, W.E.Steiner \ Malaise trap across stream montane rain forest ( USNM). 1♂: Preparation 0 194, 29/03/94 Piège lumineux soir Bassin: Ambre 1 Riv. Pte Cascade Local: Camp Base WWF [ MZL, received on slide]. 1♀: 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. 1426.4'S, 4944.5'E Malaise traps; 1 pharate ♂, 1♀. E1000-4 P1013 Madagascar Bas. Lokoho Riv. Andranomifotatra Loc. Marojejy Camp4 4944'48''E, 1426'85''S 29.11.1999 Doumenq, E.; 7♀: MADAGASCAR: Antsiranana R.N.I. de Marojejy 10.5km NW Manantenina XI.3 –XI.19.1996 1,625m Eric L. Quinter 1426.2'S, 4944.5'E Malaise traps; 1♂,1♀: 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. 1426.4'S, 4944.5'E Malaise traps; 1♀: 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. 1426.4'S, 4944.5'E Malaise traps handschr.: XI.12–XI.19 (all MZL).

Madenemura sp. 3 of Paulian, 1959: 1♂: MADAGASCAR 19km NW Man. [probably Manantenina] 1996, 150m RNI Marojejy X.22 XI.19 14 °6.0'S 49°45.1'E Malaise Traps ( MZL).

Habitus. As for the genus; WL of males 6.5–7.1mm, of females 6.3–7.5mm.

Male. The front of the epiproct baseplate projects deeply into T10, dividing it into hemitergites. The overall shape of the baseplate is trapezoidal, with sinuous sides and wide truncate caudal edge with distinct caudolateral angles. The epiproct is of similar width and has a wide peduncle. In dorsal view, the front of the epiproct is slightly convex, the rear face flat to shallowly concave ( Fig. 13 ). The subterminal spinose area is transverse, in side view it appears as a hump. The epiproct is more deeply excavated than in M. descarpentriesi ( Fig. 15 ). The paraproct body ( Fig. 14 ) resembles M. descarpentriesi but is longer and more slender, each blade being 7.5 times as long a wide.

Female. The long and narrow ovipositor is of uniform width over most of its length. It is a firm brown structure without macroscopic pilosity, except the two setae at the shallowly bilobed tip of S8. In ventral view the ovipositor extends beyond the abdominal tip for a distance that equals the basal width of S8 ( Figs. 22, 23 ).

Note. This species is recognized by the ovipositor. The species was first described from northern Madagascar but is actually widespread on the island although not common. Paulian's (1959) illustrations of the male, especially the long paraproct body, agree with the present specimens. In two distant regions, sexes were found in the same area and occurred in small numbers in trap catches dominated by other species.

In a single seemingly teneral male (WL 5.7mm) the divided antecosta of T10 forms a pair of slightly asymmetrical, slightly raised lobes ( Figs. 16 ). Insofar it corresponds to Male sp. 3 of Paulian (1959) which has not been illustrated. Paulian compared it to M. bezanozano Paulian, 1959 which I have not seen, also no male with an epiproct as wide and with prominent rear corners as shown for M. bezanozano . The paraproct body of the present male agrees with M. descarpentriesi , the epiproct resembles it also but is more strongly bent forward. The crumpled cerci suggest an artifact. It is unclear if this male is malformed or if it represents a separate taxon.

Figures

FIGURES 1 – 9. Madenemura spp. 1, Madenemura sp., wings, after a photograph; 2, M. culminalis, male abdominal tip, lateral; 3 – 9, M. andringitrensis: 3, detached and opened ventral portion of abdominal segment 9, oblique dorsal view; 4, the detached paraproct body with the retractor muscles; 5, female sternite 8 plus 9, in situ; 6, female sternite 9, detached; 7, dorsal view of center of male T 10 with epiproct; 8, caudal part of baseplate and hook of epiproct in side view; 9, the isolated paraproct body, dorsal view. 3 and 4 not to scale, 5, 6 and 7, 8 to the same scale, respectively. bb, basal bar; bp, epiproct baseplate; ce, cercus; gp, gonopore; mu, muscles; pb, paraproct body; rm, retractor muscle; S, T, sternite and tergite, respectively, with number of corresponding segment; sd, sperm duct; sp, sperm pump; vl, ventral lobe.

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.