http://www.collembola.org/key/katiidae.htm - Last updated on 2024.10.31 by Frans Janssens

Checklist of the Collembola: Key to the genera of Katiannidae

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.

Gerhard Bretfeld, Staatliches Museum für Naturkunde, Görlitz, Germany
Frans Janssens, Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium

Rationale

Key

1(0). Head with thickened or long setae........................... 2 Head without thickened or long setae........................ 4
2(1). Fourth antennal segment not divided; retinaculum with 3 + 3 teeth; third antennal segment without papilla (fig.1)..... .............................................. Vesicephalus Fourth antennal segment subdivided or annulate; retinaculum with 4 + 4 teeth; third antennal segment with papilla..... 3
Fig.1.
3(2). Sixth abdominal segment in female with acuminate seta a0; ventral head-back without spur..................... Katianna Sixth abdominal segment in female with furcate seta a0; ventral head-back with spur (fig.2)........... Neokatianna
Fig.2.
4(1). Bothriotrichum B absent; bothriotrichum C absent; fourth antennal segment as long as third antennal segment or shorter; bothriotrichum A absent; setae of large abdomen in doublets (fig.3)................................ Papirinus Bothriotrichum B present; bothriotrichum C present; fourth antennal segment longer than third antennal segment; bothriotrichum A present; setae of large abdomen in singlets.................................................. 5
Fig.3.
5(4). Head and mouthparts elongate (fig.4)........ Stenognathellus Head and mouthparts not elongate............................ 6
Fig.4.
6(5). Male with hump on second thoracic segment to third thoracic segment........................................... Zebulonia Male without hump on second thoracic segment to third thoracic segment................................................... 7
7(6). Sixth abdominal segment in female with acuminate seta a0.... 8 Sixth abdominal segment in female with furcate seta a0..... 15
8(7). Large abdomen with small spines anteriorly; lateral cuticular protuberances present on large abdomen (fig.5)............ .............................................. Parakatianna Large abdomen without small spines; lateral cuticular protuberances absent on large abdomen..................... 9
Fig.5.
9(8). Tibiotarsus basally with distinct pores (fig.6).. Rusekianna Tibiotarsus without pores.................................. 10
Fig.6.
10(9). Bothriotrichum D not on large papilla...................... 11 Bothriotrichum D short, on large papilla (fig.7)......... 14
Fig.7.
11(10). Fourth antennal segment subsegmented....................... 12 Fourth antennal segment undivided.................. Gisinianus
12(11). Fourth antennal segment obliquely subsegmented (fig.8)...... .................................................. Dalianus Fourth antennal segment transversely subsegmented.......... 13
Fig.8.
13(12). Sacs of ventral tube smooth; tibiotarsus with less than 10 spatulate setae................................ Polykatianna Sacs of ventral tube warty; tibiotarsus with 10-11 spatulate setae............................................. Millsurus
14(10). Sacs of ventral tube smooth; fourth antennal segment transversely subsegmented.................... Pseudokatianna Sacs of ventral tube warty; fourth antennal segment obliquely subsegmented (fig.9)........................... Katiannina
Fig.9.
15(7). Neosminthuroid setae absent; sacs of ventral tube warty; third antennal segment without papilla............... Betschurinus Neosminthuroid setae present; sacs of ventral tube smooth; third antennal segment with papilla............ Sminthurinus

References