Corresponding author: Louis Deharveng (
Academic editor: Sergei Golovatch
Differential characters between
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Eye position | dorsal | dorso-lateral or lateral | dorso-lateral |
PAO position | dorsal | latero-ventral or ventral | lateral |
Abd. IV-V suture | as shallow inverted V | as deep inverted V | as deep inverted V |
Habitus | slightly flattened | strongly flattened | flattened |
Number of chaetae between the anterior line of chaetae and the posterior margin of the central plate on head | 1-3+1-3<br/> in one or two rows | >3+3<br/> in several rows | 3+3<br/> in two rows |
Number of chaetae p between axis and S on abd. II-III | 2 | 3 | 3 |
Among a large material of Collembola collected in Primorskij Kraj, two new representatives of the genus
Muséum national d’Histoire naturelle de Paris (France)
Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Kraków (Poland)
Department of Biodiversity and Evolutionary Taxonomy, Wrocław University (Poland)
Moscow State Pedagogical University, Moscow (Russia)
The specimens were extracted from forest litter samples using Berlese funnels, and stored in 90% ethanol. They were cleared in lactic acid, mounted on slide in Marc-André II and examined using a microscope Leica DMLB. Photographs were taken with a ProgRes C3 camera mounted on the microscope, using either phase contrast (
Abbreviations used in tables and key: abd., abdominal tergum; PAO, postantennal organ; th., thoracic tergum; ant., antennal segment;.
Body wide, flattened dorso-ventrally. Thoracic tergum I fused to head. Suture between abdominal tergum IV and V normal or as a shallow inverted V. Integument strongly granulated dorsally, with tertiary granulations variously arranged and underlying of hexagonal regular reticulations on head, thorax II and III, and abdomen I to V. Eyes and postantennal organ located dorsally. Postantennal organ made of 9-14 entire vesicles in one row. Mandibles with five teeth, maxillae thin. Labial organite x present. Papillated chaeta L absent on labium. Antenna with distinct apical vesicle. Antenna IV with 6 thickened sensilla and one microsensillum dorsally. Dorsal chaetotaxy of short and pointed ordinary chaetae and thin s-chaetae. Chaetal arrangement strongly disrupted on head, with a large central area devoid of chaetae. Dorsal chaetotaxy reduced. Claw toothless. Furca reduced to two small swellings, each with one chaeta.
On thoracic terga, p1 correspond to chaeta m1 of
Russia: Primorskij Kraj, Shkotovsky area, Livadiysky Range, Anisimovka (43° 10’ 11” North, 132° 47’ 37” East), Khualaza Mt. Litter in mixed deciduous and coniferous forest, Berlese funnel extraction, L. Deharveng and A. Bedos leg, 19.IX.04 (samples RU-032, RU-031, RU-029).
Holotype, female adult (RU-032/1) and 7 paratypes, on slides. Holotype and 1 paratype male adult (RU-032/5) in MNHN; 2 paratypes: female (RU-032/2), male juvenile (RU-031) in ISEA; 2 paratypes: female (RU-032/3), male juvenile (RU-032/4) in DBET; 2 paratypes: females (RU-032/6, RU-029) in MSPU.
After the name of the type locality, the Khualaza mountain.
Holotype: 0.70 mm (female adult); paratypes: 0.60–0.70 mm (females), 0.45 (male RU032/5) to 0.61–0.62 mm (males juvenile). Habitus typical for the genus
Antennae shorter than head. Antennal segment I with 7 chaetae, antennal segment II with 12 chaetae. Sensory organ on antennal segment III consisting of two small sensilla bent in the same direction, two almost equal, subcylindrical guard sensilla and a small ventral microsensillum. Antennal segment IV with 6 thick subcylindrical sensilla, a microsensillum, a subapical organite and a simple apical vesicle (
Two ocelli per side, a little larger than surrounding integument granulation, indicated by blue-black pigment patches, but not distinct from surrounding secondary granules under microscopic examination. Postantennal organ slightly oval, about three times longer and two times broader than ocellus A, with 9–10 vesicles (
Dorsal chaetotaxy as on
Thoracic sterna without chaetae. Chaetotaxy of abdominal sterna I–VI as in
Tibiotarsi I, II and III with 19, 19 and 18 chaetae (chaeta M present). Femora I, II and III with 12, 11 and 10 chaetae, trochantera I, II and III each with 5 chaetae, coxae I, II and III with 3, 6 and 7 chaetae, subcoxae 2 of legs I, II and III with 0, 1 and 1 chaetae, subcoxae 1 of legs I, II and III with 1, 2 and 2 chaetae. Praetarsi with 1+1 strong chaetae. Claw short and thick, toothless (
Ventral tube with 4+4 chaetae, without chaetae at its basis. Furca reduced to two small swellings, each with one chaeta (
See the discussion of
Differential characters between
Characters |
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Colour | orange alive | light blue in alcohol | very light blue in alcohol | white in alcohol |
Dorsal tertiary granulation | ? | grouping of 2-3 secondary granules | subhexagonal areas encircled by 5 to 9 secondary granules | very large plates fringed with secondary granules |
Number of ocelli | 2+2 | 3+3 | 2+2 | 3+3 |
Number of vesicle in PAO | 11 in circle | 11-14, oval | 9-10, slightly oval | 10-12, oval |
Chaeta p6 and dorso-lateral s-chaeta on th.II–III | ? | grouped | widely separate | grouped |
Number of chaetae between the anterior line of chaetae and the posterior margin of the central plate on head | 2+2 in one row | 1-2+1-2 in one row | 2+2 in one row | 3+3 in two rows |
Number of chaetae in the posterior row between s-chaetae of abd. IV | 6 | 4 | 4 | 2 |
Number of chaetae on tibiotarsi I, II, III | 18,18,17 | 18,18,17 | 19,19,18 | 19,19,18 |
Number of chaetae on subcoxae 2 of legs I, II, III | ? | 0,1,1 | 0,1,1 | 0,2,2 |
Russia: Primorskij Kraj, Khasan Region, Pos’et Bay, Point Mramornyj (
Holotype: female adult on slide (RU-120/2) in MNHN. Paratypes: "one female juvenile on slide (RU-120/1) in MNHN; one female juvenile (RU-120/3) and one juvenile (RU-120/4, skin obtained after DNA extraction for barcoding) on slide in ISEA; one female juvenile (3a/1) and one juvenile (3a/3) on slides in DBET; one female (RU-120/5) and one juvenile (3a/2) on slides in MSPU.
The new species is dedicated to Professor R. Jacek Pomorski, the eminent taxonomist of Collembola and our friend, who left us in 2010.
Holotype: 0.92 mm (female adult); paratypes: 0.84 mm (female), 0.6-0.9 mm (female juvenile), 0.58 mm (juvenile). Habitus typical for the genus
Antennae shorter than head. Antennal segment I with 7 chaetae, antennal segment II with 12 chaetae. Sensory organ on antennal segment III consisting of two small sensilla bent in the same direction, two almost equal, subcylindrical guard sensilla and a small ventral microsensillum. Antennal segment IV with 6 thick subcylindrical sensilla, a microsensillum, a subapical organite and a very slightly bilobed apical vesicle (
Three ocelli per side, slightly bigger than surrounding integument granulation, indicated by blue-black pigment patches, but not distinct from surrounding secondary granules under microscopic examination. Postantennal organ oval, 2-3 times longer and about 1.5-2 times broader than ocellus A, with 10-12 vesicles (
Dorsal chaetotaxy as on
Thoracic sterna without chaetae. Chaetotaxy of abdominal sterna I–VI as in
Tibiotarsi I, II and III with 19, 19 and 18 chaetae (chaeta M present). Femora I, II and III with 13, 12 and 11 chaetae, trochantera I, II and III with 6, 6 and 5-6 chaetae, coxae I, II and III with 3, 6 and 7 chaetae, subcoxae 2 of legs I, II and III with 0, 2 and 2 chaetae, subcoxae 1 of legs I, II and III with 1, 2 and 2 chaetae. Praetarsi with 1+1 strong chaetae. Claw short and thick, toothless (
Ventral tube with 4+4 chaetae, without chaetae at its basis. Furca reduced to two small swellings, each with one chaeta (
Dorsal chaetotaxy of both described species exhibits some variability and frequent asymmetries. The four species of
Central area of the head;
1 | Eyes and PAO in dorsal position, body slightly flattened | 2 |
– | Eyes and PAO in lateral or dorso-lateral position, body flattened or strongly flattened | 5 |
2 | Tibiotarsi I–III with 18, 18, 17 chaetae | 3 |
– | Tibiotarsi I–III with 19, 19, 18 chaetae | 4 |
3 | 2+2 eyes, abd. IV with 6 chaetae in the posterior row between s-chaetae, orange alive | |
– | 3+3 eyes, abd. IV with 4 chaetae in the posterior row between s-chaetae, light blue in alcohol | |
4 | 2+2 eyes, abd. IV with 4 chaetae in the posterior row between s-chaetae, dorsal tertiary tubercles small, hexagonal or rounded, very light blue in alcohol | |
– | 3+3 eyes, abd. IV with 2 chaetae in the posterior row between s-chaetae, dorsal tertiary tubercles as fringed areas, white in alcohol | |
5 | 2+2 eyes, PAO in latero-ventral or ventral position | 6 |
– | 3+3 eyes, PAO in dorso-lateral position, tibiotarsi I–III with 18, 18, 17 chaetae, mandible with 5 teeth | |
6 | Abd. III and IV separate, PAO with 8–12 vesicles | 7 |
– | Abd. III and IV fused, PAO with 13–14 vesicles, on head 3+3 dorso-medial chaetae, vestigial furca with 1+1 chaetae | |
7 | Claw without teeth | 8 |
– | Claw with interno-lateral tooth, mandible with 5 teeth, tibiotarsi I–III with 18, 18, 17 chaetae | |
8 | Head with 2+2 dorso-medial chaetae, mandible with 5–6 teeth, vestigial furca with 1+1 chaetae | 9 |
– | Head with 5+5 dorso-medial chaetae, mandible with 4 teeth, tibiotarsi III with 17 chaetae, vestigial furca with 2+2 chaetae | |
9 | Tibiotarsi I–III with 18, 18, 17 chaetae, mandible with 5 teeth, ant. III with ventral guard sensillum inserted on an integument swelling, maxillary external lamella long with bent apex | |
– | Tibiotarsi I–III with 19, 19, 18 chaetae, mandible with 6 teeth, ant. III with ventral guard sensillum not inserted on an integument swelling, maxillary external lamella long with 7–10 teeth |
We are greatly indebted to Mikhail Potapov for having organized the trip in Primorskij Kraj for A. Bedos, L. Deharveng and R.J. Pomorski. The laboratory work was funded by a grant of the Muséum national d’Histoire naturelle of Paris to Wanda M. Weiner.