Hydrometra tayrona 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 : 55-57

Hydrometra tayrona Martínez and Galindo-Malagón , sp. nov.

( Fig. 3 )

Description. Macropterous male. HOLOTYPE. BL—13.40; HL—4.10; ANT/POST—3.23/1.40; HW—0.15; ANT I—0.65, ANT II—lost, ANT III—lost, ANT IV—lost; EYE—0.33; PL—2.20; PW—0.75; DIST1—0.95; DIST2—1.65; FORELEG: FEM—4.05, TIB—4.80, TAR I—lost, TAR II—lost, TAR III—lost; MIDLEG: FEM— 5.30, TIB—4.20, TAR I—lost, TAR II—lost, TAR III—lost; HINDLEG: FEM—5.80, TIB—4.50, TAR I—lost, TAR II—lost, TAR III—lost.

Head wider near anterior and posterior ends ( Fig. 3a ), covered by several minute black denticles on ventral and dorsal surfaces, except anteriorly. Dorsum of head yellowish anterior to eyes, dark gray between eyes, gray posteriorly. Venter of head darker than dorsum, dark gray anteriorly, gray posteriorly. Clypeus shining, yellowish, broad, rounded ( Fig. 3b ). Eyes bright, reddish brown. Bucculae and labium yellowish. Dorsal interocular groove deep, shorter than eyes; ventral interocular groove deep, shorter than eyes. Bucculae rounded, covering base of labium. Labium very long and thin, almost reaching middle of postocular region. Antennomere I yellow with setae mesally; antennomeres II–IV missing.

Pronotum elongated, with a row of small circular pits adjacent to anterior margin ( Fig. 3c ). Anterior lobe very short, yellowish gray, with several shallow circular punctuations randomly distributed and very short black denticles; posterior lobe yellow, with midline brown and a row of deep circular pits, and many deep circular pits randomly distributed lateral to midline. Pleural region of thorax yellow anterior to proacetabulum; remainder yellowish brown with pale line ( Fig. 3d ) extending posteriorly to anterior margin of abdominal segment VII. Pro-, meso- and metasterna blackish. Propleuron with 15 circular pits. All acetabula yellowish brown; proacetabulum with 9 pits anterior to cleft and 10 posterior to it; mesoacetabulum with 11 pits anterior to cleft and 13 posterior to it; metacetabulum with 18 pits. Wings yellowish brown with dark brown veins, reaching base of abdominal mediotergite VI. Legs yellowish brown, long, thin, with a few scattered short setae on femora and tibiae. Coxae and trochanters pale yellow.

Abdominal mediotergites I–VI shining, yellow, glabrous, without denticles; VII–VIII dull, covered by a few black denticles. Abdominal laterotergites yellow, slightly elevated. Abdominal sterna covered by very short black denticles; II blackish; III–VIII reddish brown. Abdominal sternum VII with a pair of subconical processes with short setae on apex; processes located slightly anterior to middle of segment ( Figs. 3 e–f). Abdominal segment VIII cylindrical, ventrolaterally constricted, ending dorsally in a sharp, short, curved, spine-like projection. Pygophore yellowish, rounded on posterior margin.

Material examined. Holotype: macropterous ♂: Colombia, Magdalena, Santa Marta, Parque Nacional Natural Tayrona ; 210 m. 22.v.1977, C.C. Kugler col. (IAvH-E 173043).

Distribution. Known from a single specimen collected in Parque Nacional Natural Tayrona (an Ecological Reserve) ( Fig. 7 ).

Etymology. This species is named after Tayrona National Natural Park, where the holotype was collected.

Diagnosis. Hydrometra tayrona sp. nov. can be distinguished from Neotropical congeners representatives of the genus by the body color mainly yellowish ( Fig. 3 ), with the venter blackish from the prosternum to abdominal sternum II; the broad, rounded clypeus ( Fig. 3b ); and by the subconical processes with apical setae located slightly anterior to the middle of male abdominal sternum VII ( Figs. 3 e–f). This species shares with H. quimbaya sp. nov. the processes of male abdominal sternite VII and the longitudinal pale line running along the side of the body. However, in H. tayrona sp. nov. this line is less evident and reaches only to the anterior part of abdominal segment VII ( Fig. 3f ), whereas in H. quimbaya sp. nov. it is more distinct and reaches the posterior portion of segment VII ( Fig. 4f ). The coloration of the two species are markedly different, with H. tayrona sp. nov. mainly yellowish ( Fig. 3 ) and H. quimbaya sp. nov. mainly dark brown ( Fig. 4 ). In addition, the clypeus of H. tayrona sp. nov. is broader, with the lateral and posterior margins rounded ( Fig. 3b ), whereas it is narrower, with less convex lateral margins and the posterior margin is slightly and bluntly projected in the middle in H. quimbaya sp. nov. ( Fig. 4b ); and in the latter the processes of male abdominal sternum VII are more robust ( Figs. 4 e–f), and the posterior projection of male abdominal segment VIII is thicker and straighter ( Fig. 4f ).

In comparison with H. colombiana sp.nov., H. tayrona sp. nov. shares with H. alloiona Drake & Lauck, 1959 , H. olallai Mychajliw, 1961 , H. barrana Drake, 1950 , and H. fruhstorferi Hungerford & Evans, 1934 the presence of processes on male abdominal sternite VII. However, the processes are much shorter and more mammilose in H. alloiona , H. olallai , and H. fruhstorferi ( Hungerford & Evans 1934: Plate X; Drake & Lauck 1959: Fig. 12; Mychajliw 1961: Plate II). Additionally, H. alloiona and H. olallai have lateral tufts of setae on male abdominal segment VIII ( Drake & Lauck 1959: Fig. 12; Mychajliw 1961: Plate II), which are absent in H. tayrona sp. nov. ( Figs. 3 e–f); H. barrana has no acetabular pits, which are present in H. tayrona sp. nov. ( Fig. 3d ); and H. fruhstorferi is dark brown, with the male abdominal processes located at the middle of segment VII ( Hungerford & Evans 1934: Plate X), whereas H. tayrona sp. nov. is mostly yellowish, with the processes located slightly before the middle of segment VII ( Figs. 3 e–f).

Figures

FIGURE 3. Hydrometra tayrona 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 4. Hydrometra quimbaya 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.

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