Collembola

Bernard, Ernest C., Soto-Adames, Felipe N. & Wynne, J. Judson, 2015, Collembola of Rapa Nui (Easter Island) with descriptions of five endemic cave-restricted species, Zootaxa 3949 (2), pp. 239-267 : 263

Key to Collembola species reported from Rapa Nui

1. Body globular, first four abdominal segments fused, antennae elbowed between segments 3 and 4....... Arrhopalites caecus

- Body elongated, first four abdominal segments separated, antennae straight, not elbowed............................ 2

2. Third and fourth abdominal segments of approximately equal length; eyes absent; color white........... Folsomia candida

- Fourth abdominal segment much longer than third segment; eyes present or absent; color variable...................... 3

3. Scales on head and body absent.......................................................................... 4

- Scales present........................................................................................ 7

4. Eyes and pigment present; mucro bidentate................................................................. 5

- Eyes and pigment absent; mucro falcate.................................................................... 6

5. Body pigment arranged as five longitudinal bands arranged dorsally and laterally; pigment on dorsum of fourth abdominal seg- ment arranged as a five-armed figure in adults, in juveniles as disconnected spots............ Entomobrya manuhoko n. sp.

- Body pigment arranged as transverse bands on posterior body segments; pigment of dorsum of fourth abdominal segment appearing as a transverse zig-zag band................................................. Entomobrya multifasciata

6. Hind tibiotarsus with ventral row of seven smooth pointed setae............................ Coecobrya aitorerere n. sp.

- Hind tibiotarsus with one ventral smooth, pointed seta......................................... Coecobrya kennethi

7. Mucro elongated, about half length of dens, with two strong teeth and minute third tooth; mucronal spine absent; dens with large scale-like setae............................................................. Cyphoderus manuneru n. sp.

- Mucro short, less than one third length of dens, falcate or bidentate with subapical spine, dens only with small ventral scales.................................................................................................... 8

8. Mucro falcate; body with transverse bands of pigment........................................ Seira manukio n. sp.

- Mucro bidentate, anteapical tooth present; pigment not in bands.................................................9

9. Eyes 8+8, mesonotum projecting forward over thorax; body brown or orange....................... Lepidocyrtus olena

- Eyes 4+4, mesonotum without forward projection; body blue........................... Pseudosinella hahoteana n. sp.