Pagastia Oliver, 1959

Makarchenko, Eugenyi A., 2019, Review of the genus Pagastia Oliver (Diptera: Chironomidae: Diamesinae) from North America, with description of P. (P.) subletteorum sp. nov., Zootaxa 4664 (1), pp. 115-128 : 127

publication ID

https://doi.org/10.11646/zootaxa.4664.1.5

publication LSID

lsid:zoobank.org:pub:F7CD7865-7A8E-44F4-9982-8F9E35A84FD9

persistent identifier

https://treatment.plazi.org/id/6C6C87F6-FF85-FFF2-DBDB-FE7489ACFAC9

treatment provided by

Plazi

scientific name

Pagastia Oliver
status

 

Key to the known species of Pagastia Oliver of Holarctic region

Males

1. Eyes hairy. Aedeagal lobes reduced (subgenus Hesperodiamesa Sublette ). Basal lobe of gonocoxite small..................................................................................... P. (H.) sequax ( Garrett, 1925) ( Fig. 18 View FIGURES 14–18 )

- Eyes bare or pubescent. One or two aedeagal lobes present (subgenus Pagastia Oliver ). Basal lobe of gonocoxite large.... 2

2. Both median and lateral aedeagal lobes present. AR 2.5-4.2.................................................... 3

- Only lateral aedeagal lobe present. AR 1.0–2.42............................................................. 6

3. Antepronotum with dorsal and lateral setae in widely separated groups. Median aedeagal lobe digitated and widest in distal part................................................................................................ 4

- Antepronotum completely covered with setae. Median aedeagal lobe widest medially, then tapering abruptly and with the apex forming a sharp hook.......................................... P. (Pagastia) partica ( Roback, 1957) ( Figs.16–17 View FIGURES 14–18 )

4. Gonostylus subapical with "heel".................... P. (P.) nivis (Tokunaga, 1936) ( Makarchenko 2006, Fig. 180, 5–10)

- Gonostylus subapical without "heel"...................................................................... 5

5. Apex of the gonostylus is angled.............. P. (P.) orientalis (Tshernovskij, 1949) ( Makarchenko 2006, Fig. 181, 1–5)

- Apex of the gonostylus is broadly rounded............................................................................................. P. (P.) altaica Makarchenko, Kerkis et Ivanchenko, 1997 ( Makarchenko et al. 1997, Fig. 1 View FIGURES 1–6 )

6. Anal point absent. AR 1.0–1.2. Alula of wing with some setae............. P. (P.) subletteorum sp. nov. ( Figs. 1–6 View FIGURES 1–6 , 19–20 View FIGURES 19–20 )

- Anal point present. AR 1.54–2.42. Alula without setae........................................................ 7

7. Anal point almost parallel-sided in dorsal view; lateral aedeagal lobe tapering to thin apex........................... 8

- Anal point tapering to apex; lateral aedeagal lobe wide in distal part............................................. 9

8. Anal point with rounded apex and without apical peg.................... P. (P.) orthogonia Oliver, 1959 ( Figs. 7–13 View FIGURES 7–13 , 21 View FIGURES 21–25 )

- Anal point with pointed apical peg. AR 1,56–1.75............. P. (P.) hidakamontana Endo, 2004 ( Endo 2004, Figs. 1–6 View FIGURES 1–6 )

9. Anal point narrow, tapering to pointed apex, without apical peg; gonostylus in basal part with outer angle-shaped projection. AR 2.18–2.42................ P. (P.) tianmumontana Makarchenko et Wang, 2017 ( Makarchenko &Wang 2017, Figs. 17 View FIGURES 14–18 )

- Anal point widest in basal part and thin apically, pointed and often with apical peg; gonostylus without outer basal projection. AR 1.81–2.10............................... P. (P.) lanceolata (Tokunaga, 1936) ( Makarchenko 2006, Fig. 180, 1–4)

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Chironomidae