Heteroisotoma

Jie, Ding, Potapov, Mikhail & Sokolova, Elena, 2011, Further study on the labial palp in the Isotomidae (Collembola) with reference to the genus Heteroisotoma Stach, Zootaxa 2991, pp. 49-61 : 59-60

Key to the species of the genus Heteroisotoma

1 Eyes present......................................................................................... 2

- Eyes absent......................................................................................... 4

2 PAO subdivided into distinct lobes................................................... carpenteri ( Börner, 1909)

- PAO simple.......................................................................................... 3

3 Manubrium with 4+4 apical spines on anterior side.................................. dilatosetosa ( Martynova, 1980)

- Manubrium without apical spines................................................... jacutica ( Martynova, 1980)

4 Dens with more than 6 spines along inner side of dens. Abd. IV with sensilla of common shape....................... 5

- Dens without or with only 1–2 spines at base of dens. Abd. IV with 3+3 lanceolate sensilla in the p-row.................................................................................................. stebajevae ( Rusek, 1991)

5 Abd. V with 5 long sensilla on dorsal side, 2 anterior and 3 posterior, macrosetae continuously narrowed ( Fig. 30 ). Ventroapical area of manubrium with one pair of spines...................................... heteronomica sp. nov.

- Abd. V without long sensilla on dorsal side. Macrosetae of two posterior abdominal segments expanded at distal half ( Fig. 6 ). Ventroapical area of manubrium with two pairs of spines....................................... sinorossica sp. nov.

Figures

FIGURES 26 – 30. Heteroisotoma heteronomica sp. nov.: 26, macrosetae, sensillae and p-row of setae on body tergites (area of location of pseudosensilla marked with dotted line); 27, 28, dorsal chaetotaxy of Abd. I (27) and II (28); 29, macrosetae of body tergites; 30, chaetotaxy of dorsal side of Abd. IV – VI; s, accp, as: macrosensillum, ms: microsensillum, s': pseudosensillum.

FIGURES 6, 7. Heteroisotoma sinorossica sp. nov.: 6, chaetotaxy of dorsal side of Abd. IV-VI; 7, macrosetae, sensillae and prow of common setae on body tergites; s, accp, as: macrosensillum, ms: microsensillum, s': " pseudosensillum ", Mac-s: filament-like macroseta.