Pseudosmittia nana, Andersen & Saether & Mendes, 2010

Andersen, Trond, Saether, Ole A. & Mendes, Humberto F., 2010, Neotropical Allocladius Kieffer, 1913 and Pseudosmittia Edwards, 1932 (Diptera: Chironomidae) 2472, Zootaxa 2472 (1), pp. 1-77 : 55-57

publication ID

https://doi.org/ 10.11646/zootaxa.2472.1.1

persistent identifier

https://treatment.plazi.org/id/03C0582D-9925-FF8E-BB8B-FB0B05336DB7

treatment provided by

Felipe

scientific name

Pseudosmittia nana
status

sp. n.

Pseudosmittia nana   sp. n.

( Figs 148–153 View FIGURES 148–153 )

Pseudosmittia sp. 3   Pinho et al. (2009: 164).

Type material. Holotype male, BRAZIL: Bahia State, Estação Ecológica Pau Brasil, Porto Seguro , 16º23'17.6''S, 39º10'55.6''W, 17.v. 2002, 107 m a.s.l., Malaise trap (Trilha 1), C.O. Azevedo et al. (BRPS20: BIOTA-FAPESP), ( MZUSP) GoogleMaps   . Paratypes: 2 males, São Paulo State, Parque Estadual Intervales, Ribeirão Grande, Barra Grande , 24º15'S, 48º10'W, 10–13.xii.2000, Malaise trap (Trilha 2), M.T. Tavares et al. (PEIN07: BIOTA-FAPESP) ( ZMBN) GoogleMaps   ; 1 male, as previous except 13–16.xii.2000, Malaise trap (Trilha 5), (PEIN09: BIOTA-FAPESP) ( MZUSP)   .

Diagnostic characters. The species differs from other members of the genus by having scalpellate acrostichals and from other Neotropical species except P. windwardensis   by the long costal extension.

Etymology. From Latin, nanus, dwarf, referring to the small size.

Male (n = 3–4, except when otherwise stated). Total length 0.98–1.30 mm. Wing length 0.55–0.79, 0.70 mm. Total length / wing length 1.71–1.83. Wing length / length of profemur 2.57–3.16.

Coloration. Thorax brown; abdomen with segments 3–5 pale, remaining segments brown; femora and basal half of tibiae brown, apical half of tibiae and tarsi pale brown.

Head. Antenna with twelve flagellomeres, AR 0.33 (1), ultimate flagellomere 90 (1) µm long or with thirteen flagellomeres, AR 0.32–0.36, ultimate flagellomere 126–139 µm long. Temporal setae 3–5, 4; consisting of 2–4, 3 inner verticals; 0–2, 1 outer verticals and 0–2, 1 postorbitals. Clypeus with 6–9, 7 setae. Tentorium, stipes and cibarial pump as in Figure 148 View FIGURES 148–153 . Tentorium 49–81, 68 µm long; 9–11, 10 µm wide. Stipes 49 (1) µm long. Palpomere ( Fig. 149 View FIGURES 148–153 ) lengths (in µm): 8–15, 11; 15–18, 16; 24–32, 28; 30–45, 41; 47–61, 55. Third palpomere with 3–4 lanceolate sensilla clavata, 7–11 µm long.

Thorax ( Fig. 150 View FIGURES 148–153 ). Median antepronotal lobes strongly reduced; antepronotum with 0–1, 1 lateral seta. Dorsocentrals 4–5, 4; acrostichals 2, scalpellate; prealars 1–2, 1; supraalar absent. Scutellum with 2 setae.

Wing ( Fig. 151 View FIGURES 148–153 ).Wing cuneiform. Cu 1 curved. R 4+5 ending proximal to apex of M 3+4. VR 1.23–1.82. Costal extension 30–93, 74 µm long. Brachiolum with 1 seta, other veins bare.

Legs. Spur of fore tibia 19–36, 27 µm long, spurs of mid tibia 9–11 µm and 8–9 µm long, of hind tibia 26– 34, 31 µm and 9–15, 11 µm long. Width at apex of fore tibia 17–19, 18 µm, of mid tibia 15–18 µm, of hind tibia 15–25, 21 µm. Comb with 7–12, 10 setae; longest 19–27, 24 µm long, shortest 13–16, 15 µm long. Length and proportions of legs as in Table 19.

Hypopygium ( Figs 152–153 View FIGURES 148–153 ). Anal point 1–14 µm long. Tergite IX with 2 or 4 setae. Laterosternite IX with 2 setae. Phallapodeme 31–54, 46 µm long. Sternapodeme with oral projections indicated; transverse sternapodeme 31–36, 35 µm long. Virga triangular, 9 µm long. Gonocoxite 81–102, 93 µm long. Inferior volsella with 6–8 µm wide, 8–11 µm long, digitiform anterior lobe, projecting caudad; posterior lobe low, rounded. Gonostylus 38–44, 42 µm long, with low, rounded apical crista dorsalis; megaseta 3–6, 5 µm long. HR 2.13– 2.37, 2.22. HV 2.93–3.01.

Remarks. The presence of scalpellate acrostichals makes the placement in Pseudosmittia   somewhat doubtful. However, in all other details the species resemble several other members of the genus.

Distribution and biology. The species was collected in Malaise traps in fragmented primary Mata Atlântica forests in São Paulo and Bahia States. In Bahia it was taken at about 100 m a.s.l., while in São Paulo above 800 m a.s.l.

MZUSP

Museu de Zoologia da Universidade de Sao Paulo

ZMBN

Museum of Zoology at the University of Bergen, Invertebrate Collection

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae

Genus

Pseudosmittia

Loc

Pseudosmittia nana

Andersen, Trond, Saether, Ole A. & Mendes, Humberto F. 2010
2010
Loc

Pseudosmittia sp. 3

Pinho, L. C. & Mendes, H. F. & Andersen, T. 2009: 164
2009