Hydrometra sapiranga, Moreira, Felipe Ferraz Figueiredo & Barbosa, Julianna Freires, 2013

Moreira, Felipe Ferraz Figueiredo & Barbosa, Julianna Freires, 2013, A new Hydrometra (Hemiptera: Heteroptera: Hydrometridae) from northeastern Brazil, with a key to the species recorded from the country, Zootaxa 3619 (1) : -

Hydrometra sapiranga sp. nov.

(Figs 1–6)

Brachypterous male (holotype). BL—11.52; HL—3.70; ANT/POST—2.05; HW—0.51; ANT I—0.64, ANT II—1.16, ANT III—4.74, ANT IV—1.98; EYE—0.21; PL—1.73; PW—0.54; DIST1—0.96; DIST2—1.11; FORELEG: FEM—3.84, TIB—4.06, TAR I—0.06, TAR II—0.35, TAR III—0.23; MIDLEG: FEM—4.22, TIB—4.35, TAR I—0.09, TAR II—0.45, TAR III—0.28; HINDLEG: FEM—4.86, TIB—5.23, TAR I—0.08, TAR II—0.38, TAR III—0.26.

Head dorsally black between eyes, becoming yellowish brown anteriorly and yellow posteriorly (Fig. 1). Venter of head darker than dorsum, yellowish brown anteriorly, orange brown posteriorly. Clypeus shining brown, yellowish anteriorly. Antennomeres I–II brown, III yellowish brown, IV pale yellow. Eyes bright reddish brown. Bucculae and rostrum yellowish brown. Pronotum yellow, with silvery longitudinal midline on most of posterior lobe (Fig. 2). Remaining of dorsal thorax brown to dark brown. Pleural region of thorax dark brown, with distinct longitudinal silvery stripe (Fig. 2). Venter of prothorax dark brown; venter of meso- and metathorax brown. Acetabula yellowish brown. Abdominal connexives brown; tergites shining dark brown, except for last segment brown with a dark brown shining area anteriorly. Venter of abdomen yellowish brown. Genital segments brown. Wings yellowish brown with dark brown veins. Coxae and trochanters pale yellow; remaining of legs yellowish brown.

Entire head, thorax (less densely on dorsum) and venter of abdomen covered by very short black denticles. Head very long, wider near anterior and posterior ends (Fig. 1), with several minute circular punctations anteriorly to eye. Clypeus conical (Fig. 3). Antennae with scattered short setae. Antennomere I widest, slightly thicker on apex; II cylindrical, broader than III–IV; III very thin and long; IV as wide as III, sinuous. Bucculae evident, rounded, covering base of rostrum. Rostrum very long and thin, almost reaching middle of postocular region.

Pronotum elongated, narrower near middle, with very short anterior lobe, a row of small circular punctations adjacent to anterior margin, and several small circular punctations on posterior half. Acetabula without punctures (Fig. 4). Venter of thorax without tubercles, carina or sulci.

Connexives slightly elevated. Abdominal sternite VI without spines, tubercles or brushes of setae (Fig. 5). Genital segment I cylindrical, ending dorsally in a sharp projection (Fig. 5), ventrally laterally constricted (Fig. 6). Apex of genital segments rounded (Fig. 6).

Wings brachypterous, strap-like, reaching base of abdominal tergite I. Legs long and thin, with scattered short spine-like setae on femora and tibiae.

Type-material. BRAZIL: Bahia – Mata de São João, Reserva da Sapiranga , 28.V.2002, (C. N. Francischetti): 1 bachypterous male [HOLOTYPE] ( DZRJ).

Distribution. Known from a single specimen collected on Sapiranga Ecological Reserve, an area of only 6 km 2 of Atlantic Forest located northern from Salvador, the capital of Bahia State.

Etymology. Named after the ecological reserve where the holotype was collected.

Comments. Hydrometra sapiranga sp. nov. can be distinguished from other Neotropical species of the genus by the following characteristics: body length short (ca. 11.5), ANT/POST distinctly under 2.5, dorsum of head lighter in color anteriorly and posteriorly (Fig. 1), clypeus conical (Fig. 3), pronotum yellow (Fig. 2), sides of thorax with distinct longitudinal silvery stripe (Fig. 2), acetabula without punctures (Fig. 4), male abdomen without ventral projections or brushes of setae (Fig. 5), and male abdominal segment I ending dorsally in a sharp projection (Fig. 5).

Considering South American species, H. sapiranga sp. nov. is more similar to the widespread H. argentina Berg, 1879 , sharing with it short body, clypeus longer than broad, and apex of genital segment I sharply projected. However, H. sapiranga sp. nov. has much longer head, antennae and legs, and lacks punctures on acetabula and projections on venter of male abdomen, which are present in H. argentina .

Another comparable species is Hydrometra placita Drake, 1953 , from Paraguay, which shares with H. sapiranga sp. nov. the absence of punctures on acetabula and similar body length and ANT/POST ratio. The former can be clearly separated from the new species, however, by having distinctly longer legs (anterior femur 6.20 mm, hind femur 9.35 mm), shorter head (3.10 mm), and different antennal ratio (24:42:125:80). The existence or not of projections on male abdominal venter is unknown in H. placita because the species was described based solely on females.