Canace

Munari, Lorenzo & Almeida, Jorge Mota, 2014, A new species of Canace Haliday from Portugal, with a revised key to species (Diptera: Canacidae: Canacinae), Zootaxa 3873 (2), pp. 195-200 : 196

Key to species of Canace

(Revised and modified after Mathis & Freidberg 1991)

1. Gena with 3─4 large, anaclinate setae below eye............................................................ 2

- Gena with 2 large, anaclinate setae below eye............................................................... 3

2. Posterior process of surstylus robust, slightly enlarged subapically. (W-Afrotropical, W-Palaearctic).................................................................................................... C. nasica ( Haliday, 1839)

- Posterior process of surstylus generally thinner and gradually becoming narrower toward apex. (W-Afrotropical).......................................................................................... C. rossii Canzoneri, 1982

3. Mesofrons with 3─4 pairs of proclinate setae inserted along margin anterior of median ocellus; anterior acrostichal setulae well developed, conspicuous. (W-Palaearctic: Mediterranean).................................. C. salonitana Strobl, 1900

- Mesofrons with 1─2 pairs of proclinate setae inserted along margin; anterior acrostichal setulae weak, inconspicuous, or at most slightly developed in C. ophiusae sp. nov............................................................... 4

4. Mesofrons with 1 pair of large proclinate setae and, in occasional specimens, 1 anterior pair of distinctly shorter and slightly thinner proclinate setae; anterior margin of gena bearing 1 large, anteroclinate seta. (West-Palaearctic)..................................................................................................... C. actites Mathis, 1982

- Mesofrons with 2 pairs of large proclinate setae, subequal in length and strength; anterior margin of gena bearing 1─2 large, anteroclinate setae..................................................................................... 5

5. Mesofrons with posterior pair of marginal setae inserted about in line with posterior ocelli, anterior pair inserted in line with median (anterior) ocellus; anterior margin of gena bearing 2 large, anteroclinate setae; smaller species, body length 1.80 to 2.20 mm. (W-Afrotropical)................................................... C. zvuv Mathis & Freidberg, 1991

- Mesofrons with posterior pair of marginal setae inserted about in line with median ocellus, anterior pair inserted about between the middle of frons and median ocellus; anterior margin of gena bearing 1 large and 1─2 shorter and thinner, anteroclinate setae; larger species, body length 2.53 to 3.26 mm ........................................... C. ophiusae sp. nov.