Pseudosympycnus

Soares, Matheus M. M. & Capellari, Renato S., 2020, Review of the Neotropical genus Pseudosympycnus (Diptera: Dolichopodidae) with description of six new species from Brazil and Peru, Zootaxa 4881 (2), pp. 231-256 : 233-234

publication ID

https://doi.org/10.11646/zootaxa.4881.2.2

publication LSID

lsid:zoobank.org:pub:F6E84334-C578-4AF1-AF62-5E31DDA7DF8E

DOI

https://doi.org/10.5281/zenodo.4332266

persistent identifier

https://treatment.plazi.org/id/F0238789-C80A-FFFD-FF7C-6AA404F55516

treatment provided by

Plazi

scientific name

Pseudosympycnus
status

 

Identification key to species of Pseudosympycnus (males)

(Females are not confidently associated to males at this stage and hence were not included in the present key).

1 Palpus as long as head height ( Figs 26–27 View FIGURES 16–29 ); tibia I compressed, white, except ventral surface yellow ( Fig. 70 View FIGURES 66–71 ) [ Brazil: Minas Gerais, Rio de Janeiro and S„o Paulo]....................................................... P. latitibia sp. nov.

- Palpus shorter than head height, about 1/3 to 2/3 as head height (e.g., Figs 16–19 View FIGURES 16–29 ); tibia I not compressed (or only thicker than tibiae II and III), mostly yellow or brown, never white ( Figs 11 View FIGURES 7–11 , 40–41 View FIGURES 40–41 ).......................................... 2

2 It 1 compressed and trapezoidal, with dorsal crest bearing fringe of setae increasing in size towards apex ( Figs 41 View FIGURES 40–41 , 58 View FIGURES 55–65 ); It 2 with dorsal projection, and apical crest bearing long setae ( Figs 41 View FIGURES 40–41 , 58 View FIGURES 55–65 ); tibia II with anteroventral row of erect short setae (as long as diameter of tibia) extending to IIt 1 ( Fig. 69 View FIGURES 66–71 ) [ Dominica]................................... P. perornatus Robinson

- It 1 cylindrical or nearly so ( Figs 40 View FIGURES 40–41 , 42, 44 View FIGURES 42–54 ), sometimes with dorsal row of setae, but never with crest bearing fringe of setae; It 2 without dorsal projection or apical crest bearing long setae ( Fig. 40 View FIGURES 40–41 ); tibia II without anteroventral row of erect short setae... ................................................................................................... 3

3 It 2 with 1 anteroventrally curved seta near base; It 3 compressed with dorsal rows of slender setae ( Robinson 1967, fig. 10); IIIt 3 triangular, with apical projection overlapping base of IIIt4 and with cluster of apical setae ( Robinson 1967, fig. 11) [ Mexico]..................................................................................... P. bicolor Robinson

- It 2 without anteroventrally curved seta near base; It 3 cylindrical or laterally flattened, without dorsal rows of slender setae ( Figs 40 View FIGURES 40–41 , 42 View FIGURES 42–54 ); IIIt3 cylindrical, without apical projection ( Figs 43, 46 View FIGURES 42–54 )................................................. 4

4 It 4–5 entirely white or covered by dense whitish pubescence on anterior surface ( Figs 44, 49, 53 View FIGURES 42–54 , 55, 56 View FIGURES 55–65 )................. 5

- It 4–5 entirely brown, without whitish pubescence on anterior surface ( Figs 42, 47 View FIGURES 42–54 )................................... 8

5 Palpus largely transparent ( Figs 28, 29 View FIGURES 16–29 ); metepimeron brown ( Fig. 6 View FIGURES 1–6 ); tarsus I cylindrical or nearly so, It2 with 1 long dorsal seta at apex, longer than segment ( Fig. 53 View FIGURES 42–54 ); femur III mostly yellow, but apical 1/5 brown ( Fig. 6 View FIGURES 1–6 ) [ Brazil: Amazonas].............................................................................................. P. maroaga sp. nov.

- Palpus opaque (e.g., Figs 18, 19 View FIGURES 16–29 ); metepimeron yellow ( Fig. 2 View FIGURES 1–6 ); tarsus I with flattened segments or overlapping projections ( Figs 44, 49 View FIGURES 42–54 , 55, 56 View FIGURES 55–65 ); femur III entirely yellow.............................................................. 6

6 It 4–5 (sometimes also It 3) laterally flattened, brown, and covered by dense whitish pubescence on anterior surface ( Figs 55, 56 View FIGURES 55–65 ); It3 as long as It1, without projection overlapping base of It4 ( Fig. 7 View FIGURES 7–11 ); IIIt3–4 with row of setae decreasing in size towards apex ( Fig. 57 View FIGURES 55–65 ) [ Brazil: Acre, Amazonas; Panama].................................................. P. palpiger (Van Duzee)

- It 4–5 not entirely flattened as above, white, but never covered by dense whitish pubescence on anterior surface ( Figs 44, 49 View FIGURES 42–54 ); It 3 2–3x times shorter than It1, with projection overlapping base of It4 ( Figs 44, 49 View FIGURES 42–54 ); IIIt3 with 4 posterior setae longer than tarsomere ( Figs 46, 50 View FIGURES 42–54 )..................................................................................... 7

7 Femur I yellow, with 1 conspicuous ventral seta near basal fourth, almost as long as half of femur length ( Fig. 66 View FIGURES 66–71 ); femur III with 3 ventral setae near base; It 3 dark brown, with dorsal row of curved setae ( Fig. 44 View FIGURES 42–54 ); IIt 5 white ( Fig. 45 View FIGURES 42–54 ) [ Peru]................................................................................................ P. araza sp. nov.

- Femur I brownish, without conspicuous, long ventral seta at basal fourth (e.g., Fig. 41 View FIGURES 40–41 ); femur III with ventral row of 7–8 fine setae on basal half ( Fig. 67 View FIGURES 66–71 ); It 3 white, without dorsal row of curved setae ( Fig. 49 View FIGURES 42–54 ); IIt 5 dark brown [ Brazil: Acre, Amapá and Pará].................................................................................. P. latipes (Parent)

8 Femur I brown ( Fig. 11 View FIGURES 7–11 ); It 2 without long dorsal bristle at apex ( Fig. 64 View FIGURES 55–65 ); It 3 subtriangular, projecting dorsally and overlapping base of It 4 ( Fig. 64 View FIGURES 55–65 ); It 4 2 times as long as It 5 and cylindrical ( Fig. 64 View FIGURES 55–65 ) [ Colombia: Gorgona Island; Belize]................................................................................................... P. singularis (Parent)

- Femur I yellow (e.g., Fig. 7 View FIGURES 7–11 ); It 2 with 1–2 long dorsal bristles at apex, as long as tarsomere ( Figs 40 View FIGURES 40–41 , 47, 51 View FIGURES 42–54 ); It 3 not subtriangular and not projecting dorsally over base of It 4 ( Figs 40 View FIGURES 40–41 , 47 View FIGURES 42–54 ); It 4 usually as long as It 5 (if It 4 longer than It 5, then It 4 laterally flattened)............................................................................................ 9

9 Metepimeron yellow; femur I without row conspicuous ventral setae (e.g., Fig. 41 View FIGURES 40–41 ); It 2 with 2 dorsal bristles at apex ( Figs 42, 51 View FIGURES 42–54 ); It3–4 or It4–5 conspicuously flattened ( Figs 42 View FIGURES 42–54 , 60 View FIGURES 55–65 ); IIIt3–5 with posterior and posteroventral rows of long, slightly curved setae ( Figs 43 View FIGURES 42–54 , 61 View FIGURES 55–65 ).................................................................................... 10

- Metepimeron light brown to brown; femur I with row of conspicuous ventral setae ( Figs 40 View FIGURES 40–41 , 68 View FIGURES 66–71 ); It 2 with 1 dorsal bristle at apex ( Figs 47 View FIGURES 42–54 , 62 View FIGURES 55–65 ); It3–5 cylindrical; IIIt3–5 without posterior and posteroventral rows of setae ( Figs 48 View FIGURES 42–54 , 63 View FIGURES 55–65 ).................. 11

10 It 3 twice length of It 4 ( Fig. 42 View FIGURES 42–54 ); It 3 cylindrical ( Fig. 42 View FIGURES 42–54 ); femur III without ventral row of long setae ( Fig. 1 View FIGURES 1–6 ) [ Brazil: Amapá, Pará]............................................................................... P. albipalpus (Parent)

- It3 shorter than It4 ( Fig. 60 View FIGURES 55–65 ); It3 laterally flattened ( Fig. 60 View FIGURES 55–65 ); femur III with ventral row of 3 setae on basal half, basal two short and curved at apex, apical one longer, twice diameter of femur at broadest point ( Fig. 71 View FIGURES 66–71 ) [ Brazil: Acre]..................................................................................................... P. robinsoni sp. nov.

11 It1 without row of anterior setae; It2 with 1 sinuous bristle at apex ( Fig. 62 View FIGURES 55–65 ); It3 with anterior surface mostly bare, with anterior comb of short setae at apex; distal half of femur III darkened ( Fig. 10 View FIGURES 7–11 ); tibiae II and III brown ( Fig. 10 View FIGURES 7–11 ); IIIt 4 unmodified [ Brazil: Amazonas]............................................................................ P. sehnali sp. nov.

- It1 with one anterior row of slightly curved setae, which extends to It2; It2 with 1 hook-like bristle at apex; It3 with anterior surface setose and without comb of short setae at apex ( Fig. 47 View FIGURES 42–54 ); femur III darkened only at apex ( Fig. 3 View FIGURES 1–6 ); tibiae II and III dark yellow ( Fig. 3 View FIGURES 1–6 ); IIIt 4 slightly excavated at ventral surface ( Fig. 48 View FIGURES 42–54 ) [ Brazil: Roraima, Pará].............. P. bickeli sp. nov.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Dolichopodidae