Hydrometra colombiana Martínez and Galindo-Malagón, 2019

Martínez, David Camilo, Galindo-Malagón, Ximena Alejandra, Molano, Fredy & Moreira, Felipe Ferraz Figueiredo, 2019, Descriptions, records, and key to the Hydrometra Latreille, 1796 (Hemiptera: Heteroptera: Hydrometridae) from Colombia, Zootaxa 4577 (1), pp. 51-72 : 52-55

Hydrometra colombiana Martínez and Galindo-Malagón , sp. nov

( Figs. 1 , 2 )

Description. Macropterous male. HOLOTYPE. BL—14.01; HL—3.80; ANT/POST—2.60/1.12; HW—0.16; ANT I—0.50; ANT II—lost; ANT III—lost, ANT IV—lost; EYE—0.32; PL—2.15; PW—0.70; DIST1—1.03; DIST2—1.80; FORELEG: FEM—3.85; TIB—3.35; TAR I—0.08; TAR II—0.38; TAR III—0.26; MIDLEG: FEM—4.35; TIB—3.95; TAR I—0.10; TAR II—0.50, TAR III—0.24; HINDLEG: FEM—5.60; TIB—5.50; TAR I—0.08; TAR II—0.36; TAR III—0.23.

Head wider near anterior and posterior ends ( Fig. 1a ), covered by black denticles on dorsal and ventral surfaces. Head dorsally dark brown, becoming yellowish brown anteriorly and posteriorly; ventrally pale yellow on anterior portion, yellowish brown between eyes, dark brown posterior to eyes. Clypeus shining, yellowish, almost as broad as long, with anterior margin rounded ( Fig. 1b ). Eyes bright, reddish brown. Dorsal interocular groove very shallow, shorter than eyes; ventral interocular groove shallow, shorter than eyes. Bucculae and labium yellowish; bucculae rounded, covering base of labium; labium reaching middle of eyes. Antennomere I yellow at base, dark brown towards apex; darker portion with many shining setae; antennomeres II–IV missing.

Pronotum yellowish, with midline pale through entire length, dissipating on anterior lobe; a row of deep circular pits adjacent to anterior margin ( Fig. 1c ). Anterior lobe short, yellowish, covered by several randomly distributed black denticles; posterior lobe pale yellowish gray, brownish on sides of pale midline, with a row of deep pits on midline, several shallow pits randomly distributed on each side, and a few black denticles. Pleural region of thorax pale yellow, with several black denticles and faint longitudinal pale stripe ( Fig. 1d ) extending to last abdominal segment. Pro-, meso- and metasterna pale yellow, with several black denticles. Propleuron with 13 circular pits. All acetabula pale yellow; proacetabulum with 8 pits anterior to cleft and 11 posterior to it; mesoacetabulum with 10 pits anterior to cleft and 12 posterior to it; metacetabulum with 12 pits. Wings brown, with dark brown veins, reaching base of abdominal mediotergite VI. Legs yellowish, long, thin, with a few scattered short setae on femora and tibiae. Coxae and trochanters pale yellow.

Abdominal mediotergites I–VI yellow, shining, glabrous, without black denticles; VII–VIII dull, covered by very a few black denticles. Abdominal laterotergites yellow with brown lateral margins, slightly elevated, with a few black denticles. Abdominal sterna II–VIII pale yellowish, with black denticles; sternum VII with a pair of subrectangular brushes of short, thick setae in middle of segment ( Fig. 1 e–f). Abdominal segment VIII cylindrical, ventrolaterally compressed in anterior portion; posterior portion with one tubercle covered by setae on each side; dorsally ending in a short, sharp, spine-like projection. Pygophore concolorous with rest of abdomen, with apex rounded.

Brachypterous female. BL—15.90; HL—4.35; ANT/POST—2.83/1.12; HW—0.18; ANT I—0.62; ANT II—1.39; ANT III—lost; ANT IV—lost; EYE—0.30; PL—2.30; PW—0.60; DIST1—0.92; DIST2—1.81; FORELEG: FEM—4.00; TIB—4.30; TAR I—0.08; TAR II—0.47; TAR III—0.27; MIDLEG: FEM—4.80; TIB— 4.85; TAR I—0.12; TAR II—0.65; TAR III—0.35; HINDLEG: FEM—6.10; TIB—6.20; TAR I—0.12; TAR II— 0.63; TAR III—0.34.

Head similar to male in color and structure ( Figs. 2 a–b); antennomere II yellow, distally dark brown with many shining setae. Thorax similar to male in color and structure ( Fig. 2c ), with the following differences: pleural region gray, except for very faint longitudinal white stripe ( Fig. 2d ) that reaches last abdominal segment; pro-, meso-, and metasterna gray; acetabula yellowish gray; proacetabulum with 8 pits anterior to cleft and 12 posterior to it; mesoacetabulum with 9 pits anterior to cleft and 14 posterior to it; metacetabulum with 13 pits. Wings reaching middle of abdominal mediotergite I. Abdomen similar to male, except for mediotergite VII dull, covered by very short black denticles, with long shining setae on posterior margin; dorsum of segment VIII covered by short, shining, yellow setae, ending in a sharp, short, decurved, spine-like projection with short brown setae ventrally ( Fig. 2e ). Gonocoxa with white lateral spot and long shining setae.

Material examined. Holotype: macropterous ♂: Colombia, Cundinamarca, Ricaurte , 04°16'38"N 74°46'41"W, 287 m. 03.iv.1994, N. Bolivar col. (UPTC-MHN-ART 0080). Paratypes: 1 brachypterous ♀, Colombia, Quindío, Montenegro; 1229 m. 09.iv.2005, F. Molano col. (UPTC-MHN-ART 0081). 1 macropterous ♂, Colombia, Magdalena, Santa Marta, Punta Betín. 19.xi.1977, H. Campos col. (IAvH-E-173092) .

Distribution. Known from Cundinamarca, Quindío and Magdalena departments ( Fig. 7 ).

Etymology. This species is named after the country of Colombia.

Diagnosis. Hydrometra colombiana sp. nov. can be distinguished from other American species of the genus by the following combination of characters: general body color yellowish, with faint longitudinal white stripe on the sides ( Figs. 1d, f , 2d, e ); clypeus almost as broad as long, with the anterior margin rounded ( Figs. 1b , 2b ); male abdominal sternum VII with a pair of subrectangular brushes of short, thick setae in the middle of the segment ( Fig. 1 e–f); male abdominal segment VIII posteriorly with one tubercle covered by setae on each side ( Fig. 1 e–f); and female abdominal segment VIII ending dorsally in a sharp, short, decurved, spine-like projection with short brown setae ventrally ( Fig. 2e ). Hydrometra caraiba is similar to H. colombiana sp. nov., but the former can be readily distinguished by the dark coloration of both males and females. Color pattern is useful for distinguishing Neotropical species of Hydrometra , as already indicated by Cianferoni & Buzzetti (2012). Furthermore, males of H. caraiba have the abdominal brushes of setae U-shaped, not subrectangular, and bear no tubercles covered by setae on abdominal segment VIII (Moreira & Barbosa 2 013: Fig. 14). In females, the dorsal posterior projection of abdominal segment VIII of H. caraiba is clearly longer and less curved ( Nieser 1970: Fig. 180).

Figures

FIGURE 1. Hydrometra colombiana sp. nov. (male holotype). a) Head and part of prothorax, dorsal view. b) Anterior portion of head, dorsal view. c) Pro- and mesothorax, part of head and metathorax, dorsal view. d) Thorax, part of head and abdomen, lateral view. e) Apex of abdomen, ventral view. f) Apex of abdomen, lateral view.

FIGURE 2. Hydrometra colombiana sp. nov. (female paratype). a) Head and part of prothorax, dorsal view. b) Anterior portion of head, dorsal view. c) Pro- and mesothorax, part of head and metathorax, dorsal view. d) Thorax, part of head and abdomen, lateral view. e) Apex of abdomen, lateral view.

FIGURES 7–8. Distributions of Hydrometra. 7) Three new species and 8) New records of species presented in this paper.