Micronecta (Dichaetonecta) scholtzi Fieber

Micronecta (Dichaetonecta) scholtzi (Fieber)

(Figs 3A, 10 B)

Material examined. Station 1, 29 -i-2013,3♂; 24-iv-2013, 14♂ 4♀; 22-v-2013, 7♂ 22♀; 18-viii-2013, 40♂ 63♀; station 2, 28 -vi-2013, 39 ♂58♀; station 3, 22 -v-2013, 1 ♂2♀; 21-viii-2013, 11♂ 6♀; 30-x-2013, 4♂ 3♀; station 4, 27 -ii-2013, 1 ♂; 27-iii-2013, 9♂ 9♀; 28-vi-2013, 36♂ 60♀; 18-vii-2013, 7♂ 14♀; station 6, 24 -iv-2013, 16 ♂14♀; 22-vi-2013, 6♂ 16♀; 28-vi- 2013,11♂10♀; station 7: 36°48’29.99’’N 09°50’53.43”E, 24 m, 30-i-2013, 3♂ 4♀; 28- iii-2013, 15♂ 1♀; 23-v-2013, 9♂ 13♀; 29-vi-2013, 33♂ 33♀; station 8, 25 -iv-2013, 15 ♂13♀; 23-v-2013, 153♂ 120♀; 29-vi-2013, 46♂ 35♀; 25-vii-2013, 39♂ 42♀; station 9, 23 -v-2013, 1 ♂1♀; station 10, 22 -viii-2013, 3 ♂9♀; station 13, 27 -vi-2013, 31 ♂46♀; 17-vii-2013, 35♂ 24♀; station 15, 27 -iii-2013, 3 ♂7♀; 24-iv-2013, 19♂ 6♀; 22-v-2013, 1♀; 28-vi-2013, 72♂ 53♀; 18-vii-2013, 30♂ 48♀; 21-viii-2013, 44♂ 59♀; station 17: 36°58’07.79’’N 9°05’05.67”E, 34 m, 26-iii-2013, 2♀; 27-vi-2013, 7♂ 16♀; station 18, 27 -vi-2013, 12 ♂54♀; 16- vii-2013, 7♂ 3♀; 120- viii-2013, 16 ♂13♀; station 19, 22 -v-2013, 1♀; 28-vi-2013, 5♂ 1♀; station 20, 27 -iii-2013, 2 ♂1♀; 28-vi-2013, 2♂ 4♀; 18-vii-2013, 5♂ 4♀; 20-viii-2013, 2♂ 2♀; 04-ix-2013, 4♂ 3♀; 30-x-2013, 16♂ 4♀; 29- xi- 2013,12♂ 3♀; station 22, 23 -iv-2013, 5 ♂5♀; 21-v-2013, 6♂ 11♀; 27-vi-2013, 55♂ 58♀; ♀; station 24, 23 -iv- 2013, 2♀; 27-vi-2013, 40♂ 80♀; 17-vii-2013, 51♂ 35♀; station 25, 28 -i-2013, 11 ♂12♀; 26-ii-2013, 9♂ 3♀; 23-iv- 2013, 15♂ 11♀; 21-v-2013, 15♂ 4♀; 27-vi-2013, 25♂ 14♀; station 26, 27 -vi-2013, 30 ♂28♀; 17-vii-2013, 10♂ 10♀; station 27, 27 - iii-2013, 1 ♂; 24-iv-2013, 136♂ 167♀; 28-vi-2013, 28♂ 32♀; 18-vii-2013, 65♂ 94♀; 21-viii-2013, 55♂ 91♀; station 30, 29 -vi-2013, 83 ♂27♀; 05-ix-2013, 1♀; station 31, 30 -i-2013, 1 ♂; 28-ii-2013, 2♂ 1♀; 28-iii- 2013, 1♂; station 32, 04 -ix-2013, 1♀; station 33, 05 -ix-2013, 1 ♂5♀; station 34, 28 -vi-2013, 13 ♂15♀; station 36, 24 -iv-2013, 6 ♂2♀; 22-v-2013, 21♂ 8♀; 28-vi-2013, 11♂ 36♀; 04-ix-2013, 1♂; 29-xi- 2013,1♀; 27-xii-2013, 2♂; station 37, 22 -vi-2013, 8 ♂5♀; station 41, 27 -i-2013, 1 ♂; 25-ii- 2013,1♂; 25-iii-2013, 1♀; 22-iv-2013, 9♂ 6♀; 20-v- 2013, 20♂ 20♀; 26-vi-2013, 42♂ 40♀; 16-vii-2013, 10♂ 15♀; station 42, 26 -vi-2013, 8 ♂8♀; 19-viii-2013, 2♂ 5♀; station 43, 20 -v-2013,3♂ 14♀; 26-vi-2013, 20♂ 10♀; 16-vii-2013, 12♂ 21♀; station 46, 27 -i-2013, 1♀; 25-ii-2013, 1♂ 1♀; 22-iv-2013, 9♂ 3♀; 20-v-2013, 19♂ 7♀; 26-vi-2013, 115♂ 170♀; 19-viii-2013, 35♂ 26♀; station 47, 25 -iii- 2013, 1♀; station 49, 30 -i-2013, 1♀; 28-ii-2013, 1♂; 28-iii-2013, 4♂ 3♀; 25-iv-2013, 3♀.

Comments. Micronectinae has been raised to family rank by Nieser (2008), therefore, we prefer to treat Micronecta under family Micronectidae instead of Corixidae. Micronecta scholtzi is most abundant and widespread during the warm season. It was commonly collected in sand at edge of slow-flowing regions of lotic environments, up to 398 m asl. The first record of the species for Tunisia is reported by Puton (1886) in Southern Tunisia (Oudref, Gabès) under the name Sigara laevissima Puton.

Distribution. This species occurs in western, central, southern Europe, and North Africa (Jansson 1995; Carapezza 1997; Fent et al. 2011; Aukema et al. 2013).