http://www.collembola.org/key/schoella.htm - Last updated on 2017.10.31 by Frans Janssens
Checklist of the Collembola: Key to the species of Schoettella

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.

Gabriella Castaño-Meneses & José G. Palacios-Vargas,
Laboratorio de Ecología y Sistemática de Microartrópodos, Departamento de Biología, Facultad de Ciensas, Universidad Nacional Autónoma de México, México D.F.

Note: Schoettella alba Folsom 1932 and Schoettella subcorta Salmon 1941 are not included because the authors did not see type material.

Rationale

The rationale for taxa used and not used as well as subtaxonomic classification for some taxa is to be provided.

Key

Note that no distinction between subtaxa and taxa is made in the key.

1(0). Furcula not or not well developed............................. 2
      Furcula well developed........................................ 3
 
2(1). Furcula absent....................................... idahoensis
      Furcula reduced...................................... novajaniae
 
3(1). Dens with 8 setae........................................ celiae
      Dens with no more than 5 setae................................ 4
 
4(3). Metatibiotarsus with 2 dorsal tenent hairs.................... 5
      Metatibiotarsus with 3 dorsal tenent hairs.................... 6
      Metatibiotarsus with 4 dorsal tenent hairs........ ununguiculata
 
5(4). Tibiotarsi with 2 or 3 ventral tenent hairs; unguis with inner
        teeth............................................... distincta
      Tibiotarsi without or only 1 ventral tenent hair; unguis without
        inner teeth.......................................... glasgowi
 
6(4). Protibiotarsus with 2 dorsal tenent hairs..................... 7
      Protibiotarsus with 4 dorsal tenent hairs................ andina
 
7(6). Abdomen with serrate and capitate setae; sensorial setae on
        fifth abdominal segment in p2.......................... janiae
      Abdomen with smooth acuminate setae; sensorial setae on fifth
        abdominal segment in p3.............................. tristani

Differential diagnoses

andina
Anal spines large, about the length of the unguis. Dens with no more than 5 setae. Dens with 4–5 setae. Furcula well developed. Metatibiotarsus with 3 dorsal tenent hairs. Mucro present. Protibiotarsus with 4 dorsal tenent hairs.

celiae
Dens with 8 setae. Dens with 4–5 setae. Furcula well developed. Mucro present.

distincta
Dens with no more than 5 setae. Dens with 4 setae, or with 4–5 setae. Furcula well developed. Mesotibiotarsus with 2 dorsal tenent hairs. Metatibiotarsus with 2 dorsal tenent hairs. Mucro present. Protibiotarsus with 2 dorsal tenent hairs. Tibiotarsi with 2 or 3 ventral tenent hairs. Unguis with inner teeth.

glasgowi
Dens with no more than 5 setae. Dens with 4 setae, or with 4–5 setae. Furcula well developed. Mesotibiotarsus with 2 dorsal tenent hairs. Metatibiotarsus with 2 dorsal tenent hairs. Mucro present. Protibiotarsus with 2 dorsal tenent hairs. Tibiotarsi without or only 1 ventral tenent hair. Unguis without inner teeth.

idahoensis
Dens with 2 or no setae. Furcula not or not well developed. Furcula absent.

janiae
Abdomen with serrate and capitate setae. Dens with no more than 5 setae. Dens with 4–5 setae, or with 5 setae. Furcula well developed. Mesotibiotarsus with 3 dorsal tenent hairs. Metatibiotarsus with 3 dorsal tenent hairs. Mucro present. Protibiotarsus with 2 dorsal tenent hairs. Sensorial setae on fifth abdominal segment in p2.

novajaniae
Dens with 2 or no setae, or with 2 setae. Furcula not or not well developed. Furcula reduced. Mucro absent.

tristani
Abdomen with smooth acuminate setae. Dens with no more than 5 setae. Dens with 4–5 setae, or with 5 setae. Furcula well developed. Mesotibiotarsus with 3 dorsal tenent hairs. Metatibiotarsus with 3 dorsal tenent hairs. Mucro present. Protibiotarsus with 2 dorsal tenent hairs. Sensorial setae on fifth abdominal segment in p3.

ununguiculata
Anal spines very small, about 1/5 the unguis. Dens with no more than 5 setae. Dens with 4–5 setae. Furcula well developed. Metatibiotarsus with 4 dorsal tenent hairs. Mucro present. Protibiotarsus with 4 dorsal tenent hairs.


References