Portelmis paulicruzi, Fernandes, André S., Passos, Maria Inês S. & Hamada, Neusa, 2010

Fernandes, André S., Passos, Maria Inês S. & Hamada, Neusa, 2010, The genus Portelmis Sanderson, 1953 (Coleoptera: Elmidae: Elminae): first report in Brazil, description of two new Amazonian species and species key for males, Zootaxa 2517, pp. 33-43 : 40-42

Portelmis paulicruzi sp. nov.

( Figs. 6 ; 7; 12; 13)

Diagnosis. Pronotum with sublateral carinae extending to the basal 1/5; pronotal surface without granules; with three large gibbosities, two lateral on median 1/3 and one median on basal 1/3. Prosternal process covered with coarse punctures; gradually narrowed to apex; lateral margin nearly straight; apex rounded. Disc of ventrite I densely punctate, without granules. Disc of metasternum with median longitudinal impression extending to anterior 7/8. Male genitalia, in ventral view, with paramere short, subovate, with less than 1/2 the length of median lobe, apex rounded; median lobe elongate, lateral margins parallel to each other, with apex broadly rounded; basal lobe with apicolateral margin covered with numerous setae.

Description. Holotype: male ( Figs. 6 ; 7; 12; 13). Length 2.76 mm, greatest width 1.22 mm. Body ( Figs. 6 ; 7) robust, subparallel; ventral and dorsal surface microreticulated, with irregular depressions; coarse punctures three to four times the diameter of eye facets on the presternal process, metasternal disc and metacoxae; dorsum sparsely covered with fine, short, recumbent and pale setae, with some long setae near elytral apex, scutellum glabrous; venter surface with plastron.

Head ( Figs. 6 ; 7): With small irregular depressions; frontal margin concave. Eyes moderately protuberant, laterally rounded, separated by a distance 1.5 times wider than eye. Antenna with 11 segments, long and slender, first and last segments slightly swollen and twice as long as the remaining segments. Frontclypeal suture present between bases of antennae. Clypeus rectangular, as long as and wider than labrum; anterior margin concave; lateral angles rounded. Labrum rectangular; anterior margin slightly convex; anterolateral angles rounded, with row of moderately long pale setae. Maxillary palpus with four segments; last segment swollen, as long as second and third segments combined. Labial palpus with three segments; last segment swollen, two times wider than second segment, as long as the remaining segments combined. Gula 2.5 times narrower than submentum.

Color ( Figs. 6 ; 7): Cuticle reddish-brown and opaque, except base of head, mouth parts, antennae, scutellum, trochanters and tarsus which are shiny.

Thorax ( Figs. 6 ; 7): Pronotum ( Fig. 6 ) nearly as wide at base (0.82 mm) as long (0.78 mm); wider at base than apex (0.61 mm); one sublateral carina, on each side, present on basal 1/4; impressions on disc (one longitudinal, median, on apical 3/4, with anterior 1/3 distinctly deeper; one oblique, on each side, on basal 1/ 4); gibbosities (one median, on basal 1/3; one lateral, on each side, on middle 1/3) anterolateral angles slightly produced, subacute; anterior margin broadly convex at middle and concave behind each eye, extending over base of head; lateral margin sinuate, crenate; posterior angles produced, acute; posterior margin with three arches, two broad, one on each side in front of the elytron, and one narrow in front of scutellum. Elytra ( Fig. 6 ) subparallel; longer (1.67 mm) than wide, (maximum width, at basal 1/3, 1.16 mm); second interval elevate on basal 1/8; humeral angle broadly rounded, tumid and sinuate at middle; without sublateral carinae; lateral margins crenate; disc with punctures separated by twice their diameters, half as wide as intervals between striae. Scutellum ( Fig. 6 ) flat; subtriangular; longer than wide; wider at base; anterior margin convex; posterior angle acute. Prosternum ( Fig. 7 ) with anterior margin truncate; without impressions or carinae. Prosternal process nearly as long (0.20 mm) as wide (0.18 mm), wider at base than at apex (0.16 mm); extending beyond anterior coxae; gradually and gently narrowed to apex; lateral margin nearly straight, apex rounded. Mesosternum ( Fig. 7 ) nearly as long (0.25 mm) as wide between coxae (0.23 mm); shorter than prosternum; posterior margin between mesocoxae concave, wider than anterior margin between procoxae. Metasternum ( Fig. 7 ) with median, longitudinal impression extending until apical 1/8; anterior margin between mesocoxae convex; posterior margin between metacoxae concave; posterior portion in front of metacoxae with transverse arched impression. Legs ( Figs. 6 ; 7) long; pro- and mesocoxae globular; tibiae with indistinct fringes of tomentum, two fringes on apical 1/2 (anterior and posterior margin) on the mesotibiae and one fringe on apical 1/2 on the pro- (anterior margin) and metatibiae (posterior margin); tarsal claws without basal teeth.

Abdomen ( Fig. 7 ): Wider (maximum width, ventrite I, 1.04 mm) than long (0.95 mm). Ventrite I ( Fig. 7 ) with anterior margin between metacoxae subtriangular; without carinae or impressions; disc depressed on anterior 1/3. Ventrite V ( Fig. 7 ) with posterolateral angle with strong toothlike projection; posterior margin between projections slightly convex, with moderately long setae extending beyond posterior margin.

Male Genitalia ( Figs. 12 ; 13): Paramere ( Figs. 12 ; 13) short, less than 1/2 the length of median lobe; in dorsal view ( Fig. 12 ) subovate; external lateral margin convex; internal lateral margin nearly straight; base truncate, with internal angles produced; apex rounded; in lateral view ( Fig. 13 ) gradually narrowed to apex; apex nearly truncate. Median lobe ( Figs. 12 ; 13) long, nearly as long as basal lobe. Median lobe in dorsal view ( Fig. 12 ) slightly wider than paramere; lateral margins parallel until apex; apex broadly rounded. Median lobe in lateral view ( Fig. 13 ) about the width of paramere; dorsal margin nearly straight until apical portion; ventral margin excavated at apical 1/3; apex narrow, subacute and strongly curved to venter. Basal lobe in dorsal view ( Fig. 12 ) with lateral margin on apical 1/4 densely covered with moderately long setae.

Plastron: Present on the genae, and ventral surface of thorax and abdomen except pro- and mesocoxae, tarsus and trochanters.

Type-locality. Sossego da Pantera, Igarapé da Onça Stream, Km 20, Amazonas State Highway 240 (AM- 240), Presidente Figueiredo Municipality, Amazonas State, Brazil (20’52”S, 606’43”W).

Type. Holotype (Male): BRAZIL: Amazonas: Presidente Figueiredo, Igarapé da Onça, Sossego da Pantera, 20’52”S, 606’43”W, Pensylvania light trap, with black light. P. V. Cruz leg. 19/x/2008 ( INPA).

Habitat notes. The holotype was collected with light traps placed along a second-order stream with a bedrock streambed in a fragment of terra firme (upland) forest in northern Brazil. Since no specimens of P. paulicruzi sp. nov. were found in our collections in the streams in the region, we cannot be sure of the habitat of the species. However, as previously mentioned in this paper, we found specimens of P. kinonatilis sp. nov.

and P. gurneyi Spangler, 1980 inhabiting the kinon. It is therefore possible that P. paulicruzi sp. nov. also inhabits this microhabitat, which was not sampled during our study in the area. Future studies in Presidente Figueiredo municipality should include sampling in kinon to verify if P. paulicruzi sp. nov. also inhabits this microhabitat.

Etymology. The species epithet is in honor of MSc. Paulo V. Cruz (INPA), who collected the holotype.

Comparative notes. Portelmis paulicruzi sp. nov. is closely related to P. g u r n e y i. The pronotal surface of both species lack distinct granulations; have the disc of ventrite I densely punctuated, without granules; and have the disc of metasternum with median longitudinal impression extending beyond basal 1/2 ( Figs. 6 ; 7). Portelmis paulicruzi sp. nov. can be distinguished from P. gurneyi by the presence of an elevation on the basal 1/8 of the second elytral interval (elytral intervals flat in P. g u r n e y i); prosternal process with lateral margin nearly straight (prosternal process with lateral margin concave in P. nevermanni ); and the disc of the metasternum has a median longitudinal impression extending to anterior 1/8 (median longitudinal impression extending until anterior margin in P. g u r n e y i) ( Figs. 6 ; 7). Portelmis paulicruzi sp. nov. has the apicolateral margin of basal lobe of male genitalia covered with numerous setae ( Figs. 12 ; 13), a characteristic that distinguishes it from all other Portelmis species.

Figures

FIGURES 6 – 9. Portelmis paulicruzi sp. nov.; 6) Dorsal habitus. 7) Ventral habitus. Portelmis gurneyi Spangler, 1980; 8) Dorsal habitus. 9) Ventral habitus. Scale bars: 0.5 mm.

FIGURES 10 – 19. Portelmmis kinonatilis sp. nov.; 10) Male genitalia, dorsal view. 11) Male genitalia, lateral view. 14) Female genitalia, ventral view. Portelmis paulicruzi sp. nov.; 12) Male genitalia, dorsal view. 13) Male genitalia, lateral view. Portelmis gurneyi Spangler, 1980; 15) Female genitalia, ventral view; 16) Male genitalia, ventral view; modified from Spangler (1980). 17) Male genitalia, lateral view; modified from Spangler (1980). Portelmis nevermanni (Hinton, 1936); 18) Male genitalia, ventral view; modified from Spangler (1980). 19) Male genitalia, lateral view; modified from Spangler (1980). Scale bars: 0.25 mm.