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

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.

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). Head with eyes, on conspicuous patch of dark blue pigment; body
        lightly to more heavily pigmented........................... 2
      Head without eyes; body unpigmented........................... 5
 
2(1). Head with 1+1 eyes; body lightly pigmented.............. coralia
      Head with 2+2 eyes; body usually more deeply pigmented........ 3
 
3(2). Mucro without anteapical tooth............................ wrayi
      Mucro with conspicuous anteapical tooth....................... 4
 
4(3). Differentiated seta of outer labial papilla straight; seta m1 of
        labial triangle present................................ millsi
      Differentiated seta of outer labial papilla curved; seta m1 of
        labial triangle absent................................ subfusa
 
5(1). Mucro with small anteapical tooth; subapical seta of maxillary
        palp conspicuously ciliated................................. 6
      Mucro without anteapical tooth; subapical seta of maxillary palp
        very finely ciliated........................................ 7
 
6(5). Tenent hair lanceolate; outer pair of ungual teeth basal in
        position; apex of dental lamella reaching tip of apical
        mucronal tooth......................................... nunezi
      Tenent hair clavate; outer pair of ungual teeth more distal in
        position; apex of dental lamella not reaching tip of apical
        mucronal tooth..................................... topotypica
 
7(5). Tenent hair lanceolate; unguis with an inner unpaired tooth;
        differentiated seta of outer labial papilla surpasses apex of
        its papilla by about one half of seta's length...... falcifera
      Tenent hair clavate; unguis with two inner unpaired teeth;
        differentiated seta of outer labial papilla surpasses apex of
        its papilla by about one third of seta's length............. 8
 
8(7). First two rows of labral setae smooth; paired inner ungual teeth
        unequal; outer ungual teeth basal in position....... borincana
      First two rows of labral setae ciliated; paired inner ungual
        teeth subequal; outer ungual teeth more distal in position....
         ................................................... rapoporti

Differential diagnoses

borincana
Head without eyes; body unpigmented. Mucro without anteapical tooth; subapical seta of maxillary palp very finely ciliated. Tenent hair clavate; unguis with two inner unpaired teeth; differentiated seta of outer labial papilla surpasses apex of its papilla by about one third of seta’s length. First two rows of labral setae smooth; paired inner ungual teeth unequal; outer ungual teeth basal in position.

coralia
Head with eyes, on conspicuous patch of dark blue pigment; body lightly to more heavily pigmented. Head with 1+1 eyes; body lightly pigmented.

falcifera
Head without eyes; body unpigmented. Mucro without anteapical tooth; subapical seta of maxillary palp very finely ciliated. Tenent hair lanceolate; unguis with an inner unpaired tooth; differentiated seta of outer labial papilla surpasses apex of its papilla by about one half of seta’s length.

millsi
Head with eyes, on conspicuous patch of dark blue pigment; body lightly to more heavily pigmented. Head with 2+2 eyes; body usually more deeply pigmented. Mucro with conspicuous anteapical tooth. Differentiated seta of outer labial papilla straight; seta m1 of labial triangle present.

nunezi
Head without eyes; body unpigmented. Mucro with small anteapical tooth; subapical seta of maxillary palp conspicuously ciliated. Tenent hair lanceolate; outer pair of ungual teeth basal in position; apex of dental lamella reaching tip of apical mucronal tooth.

rapoporti
Head without eyes; body unpigmented. Mucro without anteapical tooth; subapical seta of maxillary palp very finely ciliated. Tenent hair clavate; unguis with two inner unpaired teeth; differentiated seta of outer labial papilla surpasses apex of its papilla by about one third of seta’s length. First two rows of labral setae ciliated; paired inner ungual teeth subequal; outer ungual teeth more distal in position.

subfusa
Head with eyes, on conspicuous patch of dark blue pigment; body lightly to more heavily pigmented. Head with 2+2 eyes; body usually more deeply pigmented. Mucro with conspicuous anteapical tooth. Differentiated seta of outer labial papilla curved; seta m1 of labial triangle absent.

topotypica
Head without eyes; body unpigmented. Mucro with small anteapical tooth; subapical seta of maxillary palp conspicuously ciliated. Tenent hair clavate; outer pair of ungual teeth more distal in position; apex of dental lamella not reaching tip of apical mucronal tooth.

wrayi
Head with eyes, on conspicuous patch of dark blue pigment; body lightly to more heavily pigmented. Head with 2+2 eyes; body usually more deeply pigmented. Mucro without anteapical tooth.


References