Isocanace Mathis, 1982

Munari, Lorenzo, Kirk-Spriggs, Ashley H. & Mcgregor, Gillian K., 2021, The surf flies of the Mascarene Islands (Diptera: Canacidae: Canacinae), with the description of a new species, Zootaxa 4990 (3), pp. 563-570 : 565-566

publication ID

https://doi.org/ 10.11646/zootaxa.4990.3.7

publication LSID

lsid:zoobank.org:pub:62161ADA-4C37-4E75-B368-962F3B2FCF61

DOI

https://doi.org/10.5281/zenodo.5915249

persistent identifier

https://treatment.plazi.org/id/03E6BA09-7F0B-FFBA-FE90-349508C4FEFF

treatment provided by

Plazi

scientific name

Isocanace Mathis
status

 

Key to Afrotropical Isocanace Mathis View in CoL

1. Antennal arista with branches long ( Fig. 2 View FIGURES 2‒6 ), some almost double or more than aristal width at base; anepisternal and usually katepisternal setae pale, mostly yellow; male terminalia with posterior part of surstylus (in lateral view) with more or less prominent heel-shaped swelling ( Figs 4, 5 View FIGURES 2‒6 ) (Aldabra Is. & Madagascar).............................. I. briani Mathis View in CoL

- Antennal arista with branches distinctly shorter ( Fig. 3 View FIGURES 2‒6 ), as long as, or marginally longer than, aristal width at base; anepisternal and katepisternal setae black; male terminalia (in lateral view) with posterior part of surstylus without heel-shaped swelling (e. g., Fig. 6 View FIGURES 2‒6 )......................................................................................... 2

2. Thorax with anterior notopleural seta present, although weaker and shorter than posterior seta; male terminalia (in lateral view) with surstylus lacking a protruding swelling on anteromedial part, but if swelling present, then this reduced in distal 2 / 3 of lateromedian side, bearing cluster of long setulae; surstylus (in lateral view) with gently curved, posteromedial margin, or otherwise, with apical 1 / 3 narrow and curved posteriorly ( Mathis 1999, fig. 14)............................................. 3

- Thorax with anterior notopleural seta absent or very weak and pale; male terminalia (in lateral view) with surstylus bearing strongly protruding swelling on anteromedial part; surstylus (in lateral view) with broadly curved posteromedial margin... 4

3. Male terminalia (in lateral view) not as described below, with surstylus very long and narrow, with subapical posterolateral swelling bearing cluster of pale setulae, apical 1 / 3 curved posteriorly ( Mathis 1999, fig. 14) ( Kenya & South Africa)............................................................................................. I. australis Mathis View in CoL

- Male terminalia in lateral view with foot-like surstylus ( Fig. 6 View FIGURES 2‒6 ) (broadly resembling that of I. briani View in CoL ( Figs 4, 5 View FIGURES 2‒6 ), but without posterior heel-shaped swelling), with proximal stem long and slender, neck-shaped, mid part moderately swollen, ending distally with anteriorly oriented, sickle-shaped, apical tip ( Mauritius)............................ I. mauritiana Munari View in CoL sp. nov.

4. Head with 4 lateroclinate fronto-orbital setae; male terminalia with surstylus (in lateral view) narrow, sharply hooked apically, with narrow hook-like tip oriented anteriorly ( Mathis 1999, fig. 29) ( Democratic Republic of Congo)............................................................................................ I. flava (Canzoneri & Meneghini) View in CoL

- Head with 3 lateroclinate fronto-orbital setae; male terminalia with surstylus (in lateral view) strongly broadened medially, tapered apically, with large triangular tip oriented anteriorly ( Mathis 1999, fig. 30) ( Kenya)............ I. freidbergi Mathis View in CoL

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Diptera

Family

Canacidae

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