| Checklist of the Collembola: Key to the species of Holacanthella |
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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.
Mark Stevens,
Allan Wilson Centre, Massey University, PB 11-222, Palmerston North, New Zealand
David Winter,
Allan Wilson Centre, Massey University, PB 11-222, Palmerston North, New Zealand
Rod Morris,
Rod Morris Productions, Dunedin 9021, New Zealand
Jay McCartney,
Ecology Institute of Natural Resources, Massey University, PB 11-222, Palmerston North, New Zealand
Penelope Greenslade,
Department of Botany and Zoology, Australian National University, Australian Capital Territory, 0200, Australia
Frans Janssens,
Department of Biology, University of Antwerp, Antwerp, B-2020, Belgium
1(0). Body covered in apically pointed digitations, including the
first 2 antennal segments................................... 2
Body covered in apically rounded digitations absent on antennal
segments.................................................... 3
2(1). Body blue with most short digitations blue, longer digitations
yellow; body covered in digitations of two distinct lengths;
boundaries between tergites not concealed by an irregular
arrangement of digitations; digitations with dark body colour
pigment on the tip more than 20%; maximum or mean length of
adults 17 mm....................................... duospinosa
Body dark blue with yellow or white, rarely red or orange,
tipped digitations; body covered in digitations of similar
length; boundaries between tergites often concealed by an
irregular arrangement of digitations; digitations with dark
body colour pigment on the tip less than 10%; maximum or mean
length of adults 10 mm................................ spinosa
3(1). Body blue, with red, orange or yellow, rarely white, tipped
digitations; lateral digitations long some equal to or greater
than the length of antennal segments i and ii, generally more
than twice that of the dorsal digitations; maximum or mean
length of adults 13 mm; postantennal organ with 20-25
tubercules....................................... paucispinosa
Body blue/grey, with yellow, rarely red/orange, tipped
digitations, sometimes dorsal digitations same colour as body;
lateral and dorsal digitations short and of similar length all
less than the length of antennal segment i, dorsal digitations
can be partially undeveloped; maximum or mean length of adults
6 mm; postantennal organ with 25-35 tubercules.............. 4
4(3). Internal crest of claw apparently without tooth; body blue or
grey with dorsal digitations tipped with same colour as body,
but lateral digitations tipped with yellow, rarely red or
orange; maximum or mean length of adults 5 mm; postantennal
organ with 25-30 tubercules..................... laterospinosa
Internal crest of claw with tooth; body blue or grey with
yellow, rarely red or orange, tipped digitations; maximum or
mean length of adults 6 mm; postantennal organ with 30-35
tubercules....................................... brevispinosa
Endnotes
1 Salmon (1941, 1942) and Massoud (1967) included the claw, the amount of granulation and the presence or absence of a tooth in their keys. It was found these characters are not consistent between individuals (even when considering leg III only) unless specified above.
brevispinosa
Body blue/grey, with yellow, rarely red/orange,
tipped digitations, sometimes dorsal digitations same colour as body. Body
blue or grey with yellow, rarely red or orange, tipped digitations. Body
covered in apically rounded digitations absent on antennal segments. Internal
crest of claw with tooth. Lateral and dorsal digitations short and of similar
length all less than the length of antennal segment i, dorsal digitations can
be partially undeveloped. Maximum or mean length of adults 6 mm. Maximum or
mean length of adults 6 mm. Postantennal organ with 25–35 tubercules.
Postantennal organ with 30–35 tubercules.
duospinosa
Body blue with most short digitations blue, longer
digitations yellow. Body covered in apically pointed digitations, including
the first 2 antennal segments. Body covered in digitations of two distinct
lengths. Boundaries between tergites not concealed by an irregular arrangement
of digitations. Digitations with dark body colour pigment on the tip more than
20%. Maximum or mean length of adults 17 mm.
laterospinosa
Body blue/grey, with yellow, rarely red/orange,
tipped digitations, sometimes dorsal digitations same colour as body. Body
blue or grey with dorsal digitations tipped with same colour as body, but
lateral digitations tipped with yellow, rarely red or orange. Body covered in
apically rounded digitations absent on antennal segments. Internal crest of
claw apparently without tooth. Lateral and dorsal digitations short and of
similar length all less than the length of antennal segment i, dorsal
digitations can be partially undeveloped. Maximum or mean length of adults 6
mm. Maximum or mean length of adults 5 mm. Postantennal organ with 25–35
tubercules. Postantennal organ with 25–30 tubercules.
paucispinosa
Body blue, with red, orange or yellow, rarely
white, tipped digitations. Body covered in apically rounded digitations absent
on antennal segments. Lateral digitations long some equal to or greater than
the length of antennal segments i and ii, generally more than twice that of
the dorsal digitations. Maximum or mean length of adults 13 mm. Postantennal
organ with 20–25 tubercules.
spinosa
Body dark blue with yellow or white, rarely red or
orange, tipped digitations. Body covered in apically pointed digitations,
including the first 2 antennal segments. Body covered in digitations of
similar length. Boundaries between tergites often concealed by an irregular
arrangement of digitations. Digitations with dark body colour pigment on the
tip less than 10%. Maximum or mean length of adults 10 mm.