Poduromorpha

Silveira, Tatiana Cristina Da & Mendonça, Maria Cleide De, 2020, Collembola Poduromorpha from two littoral areas of northern Rio de Janeiro Brazil, Zootaxa 4885 (2), pp. 207-220 : 215-216

Key of Poduromorpha genera from littoral Rio de Janeiro, Brazil

The present key, concerning only the Poduromorpha genera found to date from littoral areas of Rio de Janeiro State, included sound diagnostic characters represented by: coloration, number of eyes, presence, absence, and shape of the postantennal organ, mouthparts, presence or absence of furca, structures present in antennal segments III and IV.

1- With pigmentation ….................................................................................. 2

- Without pigmentation ….............................................................................. 17

2 - Eyes 8+8.......................................................................................... ... 3

- Less than 8+8 eyes................................................................................... 11

3 - Postantennal organ absent.............................................................................. 4

- Postantennal organ present.............................................................................. 5

4 - Furca long, extending forward of the ventral tube, mucro with longitudinal lamella...................... Pseudanurida

- Furca absent or present, when present, dens short fused with the mucro.................................... Friesea

5 - PAO as a rosette...................................................................................... 6

- PAO moruliform ............................................................................. Aethiopella

6 - Ventral tube with 3+3 chaetae........................................................................... 7

- Ventral tube with 4+4 chaetae........................................................................... 9

7 - Globular maxilla..................................................................................... 8

- Elongate maxilla........................................................................... Rapoportella

8 - Maxilla with a variable number of regular teeth................................................. Brachystomella

- Maxilla with curved teeth like cat´s claws................................................... Brachystomellides

9 - Antenna with eversible sac................................................................. Ceratophysella

- Antenna without eversible sac.......................................................................... 10

10 - Ant IV. longer than head diagonal and without ms, furca long reaching the ventral tube, mucro long and acuminate................................................................................................. Halachorutes

- Ant IV. shorter than head diagonal and with ms, furca not elongated................................. Pseudachorutes

11 - Eyes 4+4.......................................................................................... 12

- Eyes 5+5.......................................................................................... 13

12 - Anal spines present, PAO absent, Abd. V without glandular opening, Ant. IV without dorso-basal sensory organ.... Xenylla

- Anal spines and PAO absent, Abd. V with glandular opening, Ant. IV with dorso-basal sensory organ........ Isotogastrura

13 - PAO present........................................................................................ 14

- PAO absent........................................................................................ 15

14 - PAO circular with 6-9 vesicles, furca absent.......................................................... Anurida

- PAO moruliform, with more than 12 vesicles, furca present.......................................... Neotropiella

15 - Anal spines absent................................................................................... 16

- Anal spines present.............................................................................. Xenylla

16 - Ant. IV with ms, ventral tube with 1+1 chaetae, mandible with molar plate.............................. Paraxenylla

- Ant. IV without ms, ventral tube with 3+3 chaetae; mandible without molar plate............................. Arlesia

17 - Eyes absent........................................................................................ 18

- Up to 5+5 eyes...................................................................................... 24

18 - PAO absent........................................................................................ 19

- PAO present........................................................................................ 20

19 - Furca complete, mucro straight with apex slightly................................................... Maricaella

- Furca absent............................................................................... Acherontiella

20 - PAO with lobulated vesicles; pseudocelli absent........................................................... 21

- PAO with vesicles arranged in a row; pseudocelli present.................................................... 22

21 - PAO with 4-12 vesicles … Willemia

- PAO with 3 lobes................................................................................ Stachia

22 - Anal spines absent.......................................................................... Agraphorura

- Anal spines present.................................................................................. 23

23 - Sensory organ of Ant. III with 3 large sensilla, 2 small sensilla in the fold of the integument and 3 protecting papillae, one large sensilla on ventral side..................................................................... Fissuraphorura

- Sensory organ of Ant. III with 2 microchateae, 2 thickened guard sensilla and 1 ventral thickened sensilla on the ventral side......................................................................................... Mesaphorura

24 - Eyes absent or up to 2+2; furca reduced or absent.......................................................... 25

- Eyes absent or up to 5+5; furca complete....................................................... Mesogastrura

25 - PAO present; furca reduced or absent........................................................... Micranurida

- PAO absent; furca reduced to 2 tubercles......................................................... Hylaeanura