Cryptopygus dubius
Taxonomy of the Proisotoma complex. VI. Rediscovery of the genus Bagnallella Salmon, 1951 and epitoky in Bagnallella davidi (Barra, 2001), comb. nov. from South Africa
Potapov, Mikhail
Deharveng, Louis
Janion-Scheepers, Charlene
ZooKeys
2021
2021-11-23
1072
185
204
7F0F127F-D593-50F9-8D40-8961E0A269E3
(Deharveng, 1981)
Potapov & Deharveng & Janion-Scheepers
2021
Deharveng
1981
Collembola
Bagnallella
GBIF
Animalia
Bagnallella dubia
Collembola
0
185
Arthropoda
species
dubia
comb. nov.
Figures 3 , 4
Cryptopygus dubiusDeharveng, 1981
Material examined. New Zealand, South Island, Central Otago, Pisa Rangeand Old Man'sRange, high alpine zone, different sites, 17.02.2014, M. Minorleg.
Diagnosis. Maxillary palp bifurcate, two prelabral chaetae. Dens with 12-16 anterior chaetae. Mucro bidentate. Anterior side of manubrium with 1+1 chaetae. 33/22235 s and 10/100 ms on body. 2+2 ventral chaetae on Th.III.
Description. Colour grey. Cuticle, ocelli, outer mouth parts, and antennae as in B. sedecimoculata. PAO as long as 0.8-0.9 Ant. I and as 1.4-1.5 as long as Claw III. Ventral side of head with 4+4 postlabial chaetae. Th.III with 2+2 ventral axial chaetae. Macrochaetae weakly differentiated, medial ones on Abd.V about as long as 0.4-0.5 of tergal midline. S-chaetae weakly differentiated. S-formula as 43/22235 (s), 10/100 ( ms) (Fig. 4). S-chaetae on Abd.I-III in mid-tergal position. Tibiotarsi 1-2 with 21 chaetae, Tibiotarsi 3 with few additional chaetae. Tibiotarsal tenent chaetae not developed. Ventral tube with 4+4 laterodistal and usually with five posterior chaetae. Retinaculum with 4+4 teeth and two chaetae. Anterior furcal subcoxae with 13-15 chaetae, posterior ones with 7-9. Anterior side of manubrium with 1+1 distal chaetae. Dens with 12-16 anterior chaetae, posterior side of dens with crenulation and seven chaetae (Fig. 3). Mucro bidentate. Ratio of manubrium: dens: mucro = 6.0-6.7: 5.0-6.0: 1. Males present, with two thin spurs on Tibiotarsi I.
Discussion. This species was named after its dubious position in generic system of Proisotoma/ Cryptopygus( Deharveng 1981). It resembles B. sedecimoculata(see the Discussion below) and apparently belongs to the genus Bagnallellaby separation of two last abdominal segments and s-chaetotaxy of Abd.IV and V. Our specimens from New Zealand match the first description.
Distribution. Bagnallella dubiawas described from Marion Island and recorded in Macquarie Island ( Greenslade and Wise 1986) and alpine sites of New Zealand ( Babenko and Minor 2015). The species is possibly widely distributed in cold sites of high altitudes of the Southern Hemisphere. Its occurrence in Australia ( Greenslade 2006) needs to be verified.
2014-02-17
M. Minor
New Zealand
South Island
Pisa Range
Central
1
Otago