Checklist of the Collembola: Key to the species of Oligaphorura |

This key is still under construction.
**Note** that missing figures will be provided as soon as possible.
Currently, the key is in the feasibility study phase to find
out how to integrate in the checklist in a modular way
a key that has been generated with
DELTA.

Igor J. Kaprus',
State Museum of Natural History, Ukrainian National Academy of Sciences, Teatral'na St.18, UA-79008 L'viv, Ukraine

Wanda M. Weiner,
Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Slawkowska 17, Pl-31016 Kraków, Poland

Frans Janssens,
Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium

1(0). Third antennal segment sense organ with sense clubs of other structure................................................. 2 Third antennal segment sense organ with strongly papillate sense clubs............................................ gela 2(1). Third thoracic tergum not with 3 + 3 pseudocelli............ 3 Third thoracic tergum with 3 + 3 pseudocelli................ 5 3(2). First thoracic tergum with 0 + 0 pseudocelli; second thoracic tergum with 2 + 2 pseudocelli; third thoracic tergum with 2 + 2 pseudocelli, pseudocellar formula dorsally: 32/022/22243....................................... melittae First thoracic tergum with 1 pseudocelli; second thoracic tergum with 4 + 4 pseudocelli; third thoracic tergum with 4 + 4 pseudocelli........................................... 4 4(3). Pseudocellar formula dorsally: 3, 3/0, 4........... kurtshevae Pseudocellar formula dorsally: 4, 3/1, 4, 4/5, 4, 4, 5, 3..... ................................................... montana 5(2). First thoracic tergum with 0 + 0 pseudocelli................ 6 First thoracic tergum with 1 + 1 pseudocelli............... 10 6(5). First to third abdominal terga with 3 + 3 pseudocelli each.. 7 First to third abdominal terga with 4 + 4 pseudocelli each, pseudocellar formula dorsally: 32/033/44454............... 9 7(6). Fourth abdominal tergum with 3 + 3 pseudocelli; third antennal segment sense organ with four guard chaetae. tottabetsuensis Fourth abdominal tergum with 4 + 4 pseudocelli; third antennal segment sense organ with five guard chaetae............... 8 8(7). Postantennal organ as long as 2.0 nearest pseudocellus........ ................................................. pingicola Postantennal organ as long as 3.5 nearest pseudocellus........ ................................................... koreana 9(6). Empodial appendage with distinct basal lamella; thoracic sterna ii and iii with 1 + 1 chaetae each........... reversa Empodial appendage without distinct basal lamella; thoracic sterna ii and iii without chaetae...................... nuda 10(5). Fourth abdominal tergum with 5 + 5 pseudocelli............. 11 Fourth abdominal tergum with less then 5 + 5 pseudocelli... 14 11(10). Third thoracic tergum with microsensilla................... 12 Third thoracic tergum without microsensilla.......... sabulosa 12(11). Pseudocellar formula dorsally: 3, 2/1, 3, 3/3, 3, 3, 5, 3; macrochaetae strongly developed; thoracic sterna ii and iii with chaetae.................................... aborigensis Pseudocellar formula dorsally: 3, 2/1, 3, 3/3, 3, 3, 5, 4 (5); macrochaetae poorly differentiated; thoracic sterna ii and iii without chaetae...................................... 13 13(12). Head with one pseudocellus situated on antennal base and two others outside; parapseudocellar formula 0/000/122201; antennal segment ii with 12-13 chaetae............. judithae Head with two pseudocelli situated on antennal base and one outside; parapseudocellar formula 0/000/121201; antennal segment ii with 15 chaetae......................... linderae 14(10). Fourth abdominal tergum with 3 + 3 pseudocelli, pseudocellar formula dorsally: 32/133/33333..................... palissai Fourth abdominal tergum with 4 + 4 pseudocelli, pseudocellar formula dorsally: 32/133/33343........................... 15 15(14). Third thoracic tergum with microsensilla................... 16 Third thoracic tergum without microsensilla................ 17 16(15). Fifth abdominal tergum with m1 chaetae longer than a1 and p1; labial type AC; antennal segment i in adults with 9 chaetae; claws with small lateral teeth................. groenlandica Fifth abdominal tergum with m1 chaetae shorter than a1 and p1; labial type A; antennal segment i in adults with 8 chaetae; claws without lateral teeth........................ schoetti 17(15). Labial type A; third antennal segment sense organ with granulated sense clubs; ventral tube with 8 + 8 chaetae..... ...................................................... ursi Labial type AB; third antennal segment sense organ with ribbed sense clubs; ventral tube with 6 + 6 chaetae....... tuvinica

**aborigensis**

First thoracic tergum with 1 + 1 pseudocelli. Fourth
abdominal tergum with 5 + 5 pseudocelli. Macrochaetae strongly developed.
Pseudocellar formula dorsally: 3, 2/1, 3, 3/3, 3, 3, 5, 3. Third antennal
segment sense organ with sense clubs of other structure. Third thoracic tergum
with 3 + 3 pseudocelli. Third thoracic tergum with microsensilla. Thoracic
sterna ii and iii with chaetae.

**gela**

Third antennal segment sense organ with strongly papillate
sense clubs.

**groenlandica**

Antennal segment i in adults with 9 chaetae. Claws
with small lateral teeth. Fifth abdominal tergum with m1 chaetae longer than
a1 and p1. First thoracic tergum with 1 + 1 pseudocelli. Fourth abdominal
tergum with less then 5 + 5 pseudocelli. Fourth abdominal tergum with 4 + 4
pseudocelli, pseudocellar formula dorsally: 32/133/33343. Labial type AC.
Third antennal segment sense organ with sense clubs of other structure. Third
thoracic tergum with 3 + 3 pseudocelli. Third thoracic tergum with
microsensilla.

**judithae**

Antennal segment ii with 12–13 chaetae. First
thoracic tergum with 1 + 1 pseudocelli. Fourth abdominal tergum with 5 + 5
pseudocelli. Head with one pseudocellus situated on antennal base and two
others outside. Macrochaetae poorly differentiated. Parapseudocellar formula
0/000/122201. Pseudocellar formula dorsally: 3, 2/1, 3, 3/3, 3, 3, 5, 4 (5).
Third antennal segment sense organ with sense clubs of other structure. Third
thoracic tergum with 3 + 3 pseudocelli. Third thoracic tergum with
microsensilla. Thoracic sterna ii and iii without chaetae.

**koreana**

First thoracic tergum with 0 + 0 pseudocelli. First to
third abdominal terga with 3 + 3 pseudocelli each. Fourth abdominal tergum
with 4 + 4 pseudocelli. Postantennal organ as long as 3.5 nearest
pseudocellus. Third antennal segment sense organ with sense clubs of other
structure. Third antennal segment sense organ with five guard chaetae. Third
thoracic tergum with 3 + 3 pseudocelli.

**kurtshevae**

First thoracic tergum with 1 pseudocelli.
Pseudocellar formula dorsally: 3, 3/0, 4. Second thoracic tergum with 4 + 4
pseudocelli. Third antennal segment sense organ with sense clubs of other
structure. Third thoracic tergum not with 3 + 3 pseudocelli. Third thoracic
tergum with 4 + 4 pseudocelli.

**linderae**

Antennal segment ii with 15 chaetae. First thoracic
tergum with 1 + 1 pseudocelli. Fourth abdominal tergum with 5 + 5 pseudocelli.
Head with two pseudocelli situated on antennal base and one outside.
Macrochaetae poorly differentiated. Parapseudocellar formula 0/000/121201.
Pseudocellar formula dorsally: 3, 2/1, 3, 3/3, 3, 3, 5, 4 (5). Third antennal
segment sense organ with sense clubs of other structure. Third thoracic tergum
with 3 + 3 pseudocelli. Third thoracic tergum with microsensilla. Thoracic
sterna ii and iii without chaetae.

**melittae**

First thoracic tergum with 0 + 0 pseudocelli. Second
thoracic tergum with 2 + 2 pseudocelli. Third antennal segment sense organ
with sense clubs of other structure. Third thoracic tergum not with 3 + 3
pseudocelli. Third thoracic tergum with 2 + 2 pseudocelli, pseudocellar
formula dorsally: 32/022/22243.

**montana**

First thoracic tergum with 1 pseudocelli. Pseudocellar
formula dorsally: 4, 3/1, 4, 4/5, 4, 4, 5, 3. Second thoracic tergum with 4 +
4 pseudocelli. Third antennal segment sense organ with sense clubs of other
structure. Third thoracic tergum not with 3 + 3 pseudocelli. Third thoracic
tergum with 4 + 4 pseudocelli.

**nuda**

Empodial appendage without distinct basal lamella. First
thoracic tergum with 0 + 0 pseudocelli. First to third abdominal terga with 4
+ 4 pseudocelli each, pseudocellar formula dorsally: 32/033/44454. Third
antennal segment sense organ with sense clubs of other structure. Third
thoracic tergum with 3 + 3 pseudocelli. Thoracic sterna ii and iii without
chaetae.

**palissai**

First thoracic tergum with 1 + 1 pseudocelli. Fourth
abdominal tergum with less then 5 + 5 pseudocelli. Fourth abdominal tergum
with 3 + 3 pseudocelli, pseudocellar formula dorsally: 32/133/33333. Third
antennal segment sense organ with sense clubs of other structure. Third
thoracic tergum with 3 + 3 pseudocelli.

**pingicola**

First thoracic tergum with 0 + 0 pseudocelli. First to
third abdominal terga with 3 + 3 pseudocelli each. Fourth abdominal tergum
with 4 + 4 pseudocelli. Postantennal organ as long as 2.0 nearest
pseudocellus. Third antennal segment sense organ with sense clubs of other
structure. Third antennal segment sense organ with five guard chaetae. Third
thoracic tergum with 3 + 3 pseudocelli.

**reversa**

Empodial appendage with distinct basal lamella. First
thoracic tergum with 0 + 0 pseudocelli. First to third abdominal terga with 4
+ 4 pseudocelli each, pseudocellar formula dorsally: 32/033/44454. Third
antennal segment sense organ with sense clubs of other structure. Third
thoracic tergum with 3 + 3 pseudocelli. Thoracic sterna ii and iii with 1 + 1
chaetae each.

**sabulosa**

First thoracic tergum with 1 + 1 pseudocelli. Fourth
abdominal tergum with 5 + 5 pseudocelli. Third antennal segment sense organ
with sense clubs of other structure. Third thoracic tergum with 3 + 3
pseudocelli. Third thoracic tergum without microsensilla.

**schoetti**

Antennal segment i in adults with 8 chaetae. Claws
without lateral teeth. Fifth abdominal tergum with m1 chaetae shorter than a1
and p1. First thoracic tergum with 1 + 1 pseudocelli. Fourth abdominal tergum
with less then 5 + 5 pseudocelli. Fourth abdominal tergum with 4 + 4
pseudocelli, pseudocellar formula dorsally: 32/133/33343. Labial type A. Third
antennal segment sense organ with sense clubs of other structure. Third
thoracic tergum with 3 + 3 pseudocelli. Third thoracic tergum with
microsensilla.

**tottabetsuensis**

First thoracic tergum with 0 + 0 pseudocelli.
First to third abdominal terga with 3 + 3 pseudocelli each. Fourth abdominal
tergum with 3 + 3 pseudocelli. Third antennal segment sense organ with sense
clubs of other structure. Third antennal segment sense organ with four guard
chaetae. Third thoracic tergum with 3 + 3 pseudocelli.

**tuvinica**

First thoracic tergum with 1 + 1 pseudocelli. Fourth
abdominal tergum with less then 5 + 5 pseudocelli. Fourth abdominal tergum
with 4 + 4 pseudocelli, pseudocellar formula dorsally: 32/133/33343. Labial
type AB. Third antennal segment sense organ with sense clubs of other
structure. Third antennal segment sense organ with ribbed sense clubs. Third
thoracic tergum with 3 + 3 pseudocelli. Third thoracic tergum without
microsensilla. Ventral tube with 6 + 6 chaetae.

**ursi**

First thoracic tergum with 1 + 1 pseudocelli. Fourth
abdominal tergum with less then 5 + 5 pseudocelli. Fourth abdominal tergum
with 4 + 4 pseudocelli, pseudocellar formula dorsally: 32/133/33343. Labial
type A. Third antennal segment sense organ with sense clubs of other
structure. Third antennal segment sense organ with granulated sense clubs.
Third thoracic tergum with 3 + 3 pseudocelli. Third thoracic tergum without
microsensilla. Ventral tube with 8 + 8 chaetae.