Suphis intermedius Régimbart, 1903

Urcola, Juan I., Guimarães, Bruno A. C., Torres, Patricia L. M., Fery, Hans & Michat, Mariano C., 2023, Redescription and neotype designation of Suphis fluviatilis Guignot, 1948 (Coleoptera: Dytiscoidea: Noteridae) and notes on other species of the genus, Zootaxa 5374 (1), pp. 137-147 : 144-146

Notes on Suphis intermedius Régimbart, 1903

( Figs 2 , 15 , 19–23 )

We take the opportunity to report new locality data extending the distribution of this species, and to illustrate its male genitalia for the first time, with the purpose of comparing them with those of S. fluviatilis (see differential diagnosis above). Type material examined. BRAZIL: Mato Grosso State. 15 syntypes, labelled “ MNHN / EC10415 ” to “ MNHN / EC10429 ” [typed, white labels]: “Brésil / Prov. Matto-Grosso / P. Germain / 1886” [typed, white label], “intermedius Reg ” [handwritten, white label], “ MUSEUM PARIS / 1952 / coll. R. OBERTHÜR” [typed, white label], “ SYNTYPE ” [typed, red label], “SYNTYPE / Suphis / intermedius Régimbart , / 1903” [typed, white label]. 1 syntype labelled “ MNHN / EC10413 ” [typed, white label]: same data as above except that the label “ MUSEUM PARIS / 1952 / coll. R. OBERTHÜR” is replaced by “ MUSEUM PARIS / COLL. MAURICE REGIMBART / 1908” [typed, light blue label]. 1 syntype labelled “ MNHN / EC10414 ” [typed, white label]: same data as above except without the label “intermedius Reg ”. Additional material examined. BRAZIL: Mato Grosso State. 2 ♁♁ (habitus and male genitalia in Figs 15 , 19–21 ), 1 ♀ and 36 exs, Corumbá, Col. Zimmermann ( ZSM) . PARAGUAY: Canindeyú Department. 2 ♀♀ (habitus in Fig. 22 ), Reserva Natural del Bosque Mbaracayú , 14.XII.2003, Col. Di Iorio ( LEBA) .

Diagnosis. TL = 2.8–3.25 mm. [mean = 3.00 mm]. Background color brownish-red, elytra marmorated ( Figs 2 , 19, 21, 22 ); dorsal surface with macro- and micropunctation ( Fig. 23 ); pronotum with 16 spots, with central spots smaller, subcircular and well defined ( Figs 2 , 19, 21, 22 ); lateral margins of metacoxal processes divergent posteriorly ( Fig. 20 ); male genitalia as in Fig. 15 : left lateral lobe bearing a single tuft of setae ( Fig. 15b ), median lobe in lateral view ( Figs 15d, f ) with apex rounded, in dorsal view ( Fig. 15e ) with base comprised of perpendicular lateral notches.

Male genitalia ( Fig. 15 ). Aedeagus asymmetrical; right lateral wall of segment IX rhomboid-like ( Fig. 15a ), posterior margin with notch, ventral lobe more projected backwards, apex of left lateral wall of segment IX (only part of this structure could be observed) pointed; left lateral lobe in lateral view ( Fig. 15b ) relatively elongate, slender, slightly curved, with single tuft of hair-like setae on distal third, longer at apex; right lateral lobe in lateral view ( Fig. 15c ) relatively short, robust, with deep longitudinal groove on dorsal side, creating an inward fold, left lateral flange reduced ventrally, apex with setae of different lengths; median lobe ( Figs 15d–f ) longer than lateral lobes, in lateral view robust, width nearly uniform along its length, apex rounded; slightly curved dorsally at about mid length, ventrally with deep longitudinal groove subtended by lateral flanges, left lateral flange slightly enlarged, expanded ventrally, converging with right side at or near apex; in dorsal aspect, slightly curved to the left side; base large, comprised of perpendicular lateral notches.

Distribution. So far, the species was known only from Brazil ( Grosso 1993). Here we add the first record from Paraguay.

Figures

FIGURES 1–5. Habitus of Suphis species, dorsal aspect: (1) Neotype of Suphis fluviatilis Guignot, 1948; (2) Syntype of Suphis intermedius Régimbart, 1903 (specimen EC10413 from MNHN); (3) alleged holotype of Suphis fluviatilis Guignot, 1948, to which we added two labels as follows: “Suphis notaticollis / Zimmermann, 1921 / Urcola et al. det. 2023”; “This specimen is NOT / the holotype of Suphis / fluviatilis Guignot, 1948. / See Urcola et al. 2023”; (4) paratype of Suphis bullatus Guignot, 1950; (5) syntype of Suphis notaticollis Zimmermann, 1921. Figs 2–4: MNHN: Antoine Mantilleri, 2020. Fig. 5: ZSM: Ditta Amran Balke, 2022. Scale bar = 3 mm.

FIGURES 12–15. Morphological structures of Suphis species. (12–14) Suphis fluviatilis Guignot, 1948: (12) Pronotum (left side), dorsal aspect: a) with discal spots separated, male from Paraguay, Fortín Patria; b) with discal spots coalescent, neotype; (13) metaventrite and metacoxal processes, male from Paraguay, Fortín Patria; (14) genitalia, neotype: a) segment IX, right lateral aspect; b) left lateral lobe, right lateral aspect; c) right lateral lobe, right lateral aspect; d) median lobe, left lateral aspect; e) median lobe, dorsal aspect; f) median lobe, right lateral aspect. (15) Suphis intermedius Régimbart, 1903, genitalia, male from Brazil, Corumbá (ZSM): a) segment IX, right lateral aspect; b) left lateral lobe, right lateral aspect; c) right lateral lobe, right lateral aspect; d) median lobe, left lateral aspect; e) median lobe, dorsal aspect; f) median lobe, right lateral aspect. Scale bars = 0.25 mm.

FIGURES 19–25. Habitus of Suphis species: (19–21) Suphis intermedius Régimbart, 1903, male from Brazil, Corumbá (ZSM): (19) Dorsal aspect; (20) ventral aspect; (21) lateral aspect; (22) S. intermedius Régimbart, 1903, female from Paraguay, Reserva Natural del Bosque Mbaracayú (LEBA), dorsal aspect; (23) detail of pronotal and elytral surface showing macro- and micro- punctation; (24) holotype (by monotypy) of S. insculpturatus Zimmermann, 1921, dorsal aspect; (25) detail of pronotal and elytral surface showing macropunctation and absence of micropunctation. Scale bar = 1 mm.