Microvelia inguapi, Padilla-Gil & Moreira, 2013

Padilla-Gil, Dora N. & Moreira, Felipe Ferraz Figueiredo, 2013, Two new species of Microvelia Westwood, 1834 (Hemiptera: Heteroptera: Veliidae) from Colombia, with a key to Colombian species, Zootaxa 3745 (5), pp. 587-595 : 588

Microvelia inguapi sp. n.

( Figs. 1–9 )

= Microvelia inquilina ; Padilla-Gil & Arcos (2011), nec Polhemus & Hogue, 1972

= Microvelia inquilina ; Padilla-Gil (2012), nec Polhemus & Hogue, 1972

Type material. HOLOTYPE, ♂ apt: COLOMBIA, Nariño Department, Tumaco Municipality, Inguapi , 17.XI.2010, D.N. Padilla, leg. ( ICN) . PARATYPES, same data as holotype, 3 apt ♀, 1 apt ♂, ( PSO-CZ); 2 apt ♀ ( ICN); 22. VI .2010, 1 apt ♀ ( PSO-CZ). Same municipality, Estero Chilvi, Mar Agrícola, 17.XI.2010, D.N. Padilla, leg, 2 apt ♀, 1 apt ♂ ( ICN) .

Color and pilosity. Body covered by short, brown pubescence and semi-recumbent golden setae. Head dorsally and ventrally dark brown. Eyes red. Antennae and legs shining yellow, except tibiae and tarsi brown. Rostrum shining brown except for segment IV dark black; genital segments shining brown. Pronotum with anterior transverse yellow band. Venter of abdomen dark grey; abdominal sternite VII centrally with black pubescence.

Apterous male ( Fig. 1–7 ) BL: 1.86; HL: 0.34; HW: 0.56; ANT I–IV: 0.24, 0.22, 0.28, 0.30; INT: 0.32; EYE: 0.12; PL: 0.32; PW: 0.78; FORELEG: FEM: 0.52, TIB: 0.44, TAR I: 0.04, TAR II: 0.14; MIDLEG: FEM: 0.62, TIB: 0.60, TAR I: 0.10, TAR II: 0.22; HINDLEG: FEM: 0.64, TIB: 0.72, TAR I: 0.06, TAR II: 0.18.

Head with midline shining black ( Fig. 1 ). Antennae reaching well beyond pronotum. Antennomere I thickest, curved outward, II widening to apex, III cylindrical, IV fusiform ( Fig. 2 ). Rostrum extending slightly past middle of mesosternum. Pronotum covering mesonotum and metanotum; with scattered subcircular punctuations, lacking a median carina ( Fig. 1 ). Abdominal connexiva slightly elevated, with posterolateral angles rounded; last abdominal tergite trapezoidal, with posterior margin slightly rounded. Genital segment I rounded ( Fig. 1 ). Abdominal sternite VII with a broad medial depression ( Fig. 3 ). Venter of genital segment I with posterior margin rounded ( Fig. 3 ). Genital segment II hidden. Parameres elongate ( Fig. 4 ).

Fore tibia triangular with well developed grasping comb extending beyond apex, black, apex rounded ( Fig. 5 ). Middle tibia with a pair of long, black setae at posteroventral angle ( Fig. 6 ). Hind trochanter angled upward and bearing a small tubercle projecting beyond posterior margin ( Fig. 7 ).

Apterous female ( Figs. 8–9 ) BL: 2.08; HL: 0.32; HW: 0.60; ANT I–IV: 0.26, 0.22, 0.30, 0.40; INT: 0.36; EYE: 0.12; PL: 0.30; PW: 0.80; FORELEG: FEM: 0.52, TIB: 0.44, TAR I: 0.04, TAR II: 0.20; MIDLEG: FEM: 0.62, TIB: 0.60, TAR I: 0.10, TAR II: 0.24; HINDLEG: FEM: 0.64, TIB: 0.74, TAR I: 0.10, TAR II: 0.24.

Abdomen widened, with tergites I– V concave ( Fig. 8 ) and sternites slightly convex; connexiva slightly turned upward (20º); last abdominal tergite trapezoidal, with posterior margin slightly concave. Genital segment I with divergent lateral margins and posterior margin broadly rounded. Sternite VII bearing two pits on anterolateral margin ( Fig. 9 ). Venter of genital segment I with posterior margin broadly rounded ( Fig. 9 ). Genital segment II smaller and rounded ( Fig. 9 ). Grasping comb absent; all tibiae with grooming structures on posteroventral angles; hind trochanter not raised, lacking a tubercle.

Comparative notes. Specimens of Microvelia inguapi sp. n. can be diagnosed by the long pronotum which covers the meso- and metanotum; the male with grasping comb extending beyond apex of fore tibia ( Fig. 5 ); all femora without spines; the male hind trochanter raised and bearing a tubercle ( Fig. 7 ); and by the modifications found on the venter of the male and female abdomens ( Figs. 3 , 9 ).

Based on the original description, M. inguapi sp. n. is similar to M. inquilina J. Polhemus & Hogue, 1972 . They share similar habitats, and general shape of body, antennae, apical abdominal segments of the male, and the shape of the male paramere are similar. However, M. inquilina is smaller (male BL: 1.15; female BL: 1.33); the metanotum is not covered by the pronotum; no modifications are found on the legs; and the grasping comb of the fore tibia is short.

Habitat. Microvelia inguapi sp. n. has been collected in two estuaries. Chilvi was characterized by an air temperature of 25 ºC, a water temperature of 26.5 ºC, pH 6, dissolved oxygen 65%, conductivity 1 S/m, depth> 1 m, and substrate with numerous crab holes. Inguapi had an air temperature of 25.5 ºC, a water temperature of 27 ºC, pH 6, dissolved oxygen 108%, conductivity 1 S/m, and depth> 1 m.

Figures

FIGURES 1–4. 1. Microvelia inguapi, apterous male, dorsal habitus without appendages. Scale 0.10 mm. 2. Microvelia inguapi, apterous male, antenna, lateral view. Scale 0.05 mm. 3. Microvelia inguapi, apterous male, apex of abdomen, ventral view. Scale 0.10 mm. 4. Microvelia inguapi, apterous male, paramere, lateral view. Scale 0.025 mm.

FIGURES 5–9. 5. Microvelia inguapi, apterous male, fore tibia and tarsus, lateral view. Scale 0.05 mm. 6. Microvelia inguapi, apterous male, middle tibia, lateral view. Scale 0.05 mm. 7. Microvelia inguapi, apterous male, trochanter and femur posterior, lateral view. Scale 0.05 mm. 8. Microvelia inguapi, apterous female, habitus without legs. Scale 0.10 mm. 9. Microvelia inguapi, apterous female, apex of abdomen, ventral view. Scale 0.05 mm.