Dryopomorphus memei, Čiampor, Fedor, Čiamporová-Zaťovičová, Zuzana & Kodada, Ján, 2012

Čiampor, Fedor, Čiamporová-Zaťovičová, Zuzana & Kodada, Ján, 2012, Malaysian species of Dryopomorphus Hinton, 1936 (Insecta: Coleoptera: Elmidae), Zootaxa 3564, pp. 1-16 : 13-15

Dryopomorphus memei n.sp.

Figs. 8 , 31–33 , 47, 48

Type locality: Malaysia, Sarawak, Kelabit highlands, Umg. Bario.

Type material: holotype male ( NMW): ”MAL., Sarawak, 1993, Kelabit HL, Umg. Bario, 28.2., 1000–1200m, leg. M. Jäch (16)”, paratypes ( CCB, CKB, NMW): 5 males, 5 females, 9 unsexed exs.: ” MAL., Sarawak, 1993, Kelabit HL, Umg. Bario, 28.2., 1000–1200m, leg. M. Jäch (16)”, 23 exs.: ” MAL., Sarawak, 1993, Kelabit HL, Umg. Bario, 26.2., ca. 1000m, leg. M. Jäch (14)”, 3 unsexed exs.: ” MAL., Sarawak, 1993, Kelabit HL, 5km E Bario, Pa Ukat, 1.3., ca. 1000m, leg. M. Jäch (17)”.

Diagnosis: larger species; body form elongate; resembles D. grandis sp.nov., from which it differs in darker femora and median lobe with simple rounded apex.

Description. Body elongate, CL: 3.88–4.07 mm, 2.11–2.26 times as long as wide (CL/EW), convex dorsally ( Fig. 8 ); dorsal surface with dense short pale setae and sparser longer semierect setae. Coloration of head, pronotum, elytra, femora and tibiae dark almost black, tarsi, antennae and anterior pronotal angles brown.

Head partly retractable into prothorax. Labrum shorter than wide, ca. as long as clypeus, partly concealed by clypeus, densely setose, lateral angles rounded with brush of long curved yellowish setae, anterior margin straight; clypeus longer and wider than labrum, about twice as wide as long, densely setose; frontoclypeal suture visible, straight; surface of clypeus and labrum densely punctured. Eyes well developed, slightly protruding from head outline, suboval in lateral view, ID: 0.49–0.56 mm; surface not raised near dorsal margin of eyes; frons and vertex irregularly densely punctured, interstices shiny, punctures setigerous.

Thorax. Pronotum widest before base, PW: 1.33–1.42 mm, PL: 0.84–0.92 mm; disc convex, surface with larger setigerous punctures separated by 1–2 times puncture diameter; sides convex, slightly explanate, anterior angles more explanate than sides, produced, rounded; hypomeron subparallel, anteriorly ca. three times as wide as protibia, anterior depression well impressed, surface glabrous, densely setose. Sublateral basal sulci almost straight, present ca. along posterior 0.4 of pronotum. Prosternal process parallelsided, ca. 1.8 times as long as prosternum in front of coxae, lateral margins markedly raised, posterior margin distinctly produced medially; surface glabrous. Mesoventrite short, widest in middle, markedly constricted between coxae, mesoventral cavity deep. Metaventrite impressed anteriorly between coxae; discrimen suture thin, present along whole length or interrupted behind anterior depression; disc flat, sides with larger punctures, with row of deep partly fused punctures before each metacoxa, surface equally pubescent as prosternum. Elytra 3.04–3.22 mm long (EL), 1.77–1.88 mm wide (EW); disc convex, densely pubescent; anterior margin sinuate, sides parallel in anterior half, then gradually arcuately converging posteriad, narrowly explanate; anterolateral corners rounded; humeri feebly prominent; epipleuron widest anteriorly, slightly inflected at level of metacoxa, narrowed posteriad, with distinct anterior transverse carina. Each elytron with ten striae, these not impressed, punctures small and deep; intervals flat, with dense micropunctation. Scutellum longer than wide, drop-shaped. Legs pubescent, not modified, tibiae relatively long, mid and hind tibiae without pubescence on upper side, with rows of cleaning fringes.

Abdomen. Intercoxal process of first ventrite triangular, longer than wide, lateral margins raised continuously into carinae reaching posterior margin of ventrite, apex subacute; admesal cavities short, oblique; lateral portion of ventrite I with distinct larger setigerous punctures; posterolateral angles of ventrite III–IV very feebly protruding posteriad; apex of ventrite V rounded.

Aedeagus ( Figs. 31–33 ) wide, phallobase as long as penis, basal process distinct; parameres ca. 0.7 times as long as phallobase, wide in dorsal or ventral view, in lateral view distinctly narrowed toward apex; median lobe feebly developed, slightly longer than parameres, apex round; fibula feebly developed; ventral sac robust, finely sculptured in apical portion; penis in dorsal view narrow, slightly widened basally, in lateral view slightly sinuate, basolateral apophyses moderately long. Ovipositor ( Figs. 47, 48 ) with terminal segment short, cylindrical, bearing several types of sensilla; preterminal segment 3.6 times as long as terminal segment, with pair of distinct sensilla; basal segment ca. 1.4 times as long as preterminal and distal segments combined, fulcrum ventrale curved.

Distribution. Known from several localities in the Crocker Range Mountains, Sabah, Malaysia.

Etymology. This species is dedicated to the very good friend of the daughter of the junior author, called Meme.

Figures

FIGURES 5 – 8. Habitus of Dryopomorphus species from Malaysia: 5) D. grandis n. sp. (holotype); 6) D. jaechi n. sp. (holotype); 7) D. sarawacensis n. sp. (holotype); 8) D. memei n. sp. (holotype) Scale bar: 1 mm.

FIGURES 31 – 33. Dryopomorphus mamei n. sp. (holotype): 31) aedeagus ventral view; 32) aedeagus dorsal view; 33) aedeagus lateral view. Scale bar: 0.1 mm.

FIGURES 41 – 48. Ovipositors: 41) D. grandis n. sp.; 42) same, detail of terminal segment; 43) D. jaechi n. sp.; 44) same, detail of terminal segment; 45) D. sarawacensis n. sp.; 46) same, detail of terminal segment; 47) D. memei n. sp.; 48) same, detail of terminal segment. Scale bar: 0.1 mm.