Friesea septem, Weiner & Bedos & Deharveng, 2009
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publication ID |
https://doi.org/ 10.5252/z2009n3a8 |
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persistent identifier |
https://treatment.plazi.org/id/EB7AE518-FFB7-FFC7-FEF1-FAB35AAC7FBE |
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treatment provided by |
Marcus |
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scientific name |
Friesea septem |
| status |
sp. nov. |
Friesea septem View in CoL n. sp.
( Fig. 4 View FIG )
TYPE MATERIAL. — Vanuatu. Sanma province, Espiritu Santo Island, Belmol, forest near Fioha , litter, sifting and berlese extraction, 7.IX.2006, Deharveng & Bedos leg., ♂ holotype on slide (SK06-07-04/2, MNHN). — Same data as holotype, 1 ♀ paratype on slide ( ISEA) ; 1 ♂ juv. paratype on slide ( MNHN) ; 16 paratypes in alcohol ( MNHN) .
TYPE LOCALITY. — Vanuatu, Sanma province, Espiritu Santo Island, Belmol, forest near Fioha, litter.
OTHER MATERIAL EXAMINED. — Vanuatu. Sanma province, Espiritu Santo Island, Boutmas, Fapon doline nº 3, forest litter, Berlese extraction, 380 m a.s.l., 5.IX.2006,
Deharveng & Bedos leg., several ex. (sample n° SK06- 05-14, MNHN). Sanma province, Malo Island, Avorani, forest litter, Berlese extraction, 15.IX.2006, Deharveng & Bedos leg., several ex.(sample n° SK06-15-08, MNHN). — Same data, forest soil, several ex. (sample n° SK06-15-13, MNHN). Sanma province, Espiritu Santo Island, Funafus, Riorua, forest litter, Berlese extraction, 17.IX.2006, Deharveng & Bedos leg., several ex. (sample n° SK06-17-13, MNHN).
ETYMOLOGY. — The species name septem refers to the presence of 7 s-chaetae on antennal segment IV, an unusual character that we checked on all specimens at hand.
ECOLOGY. — Friesea septem n. sp. is frequent in forest soil and litter on Santo Island.
DESCRIPTION
Habitus and buccal cone typical for the genus Friesea . Length: 0.77 mm (holotype), 0.68 mm (paratype male juv.), 0.77 mm (paratype female), 0.71-0.98 (females, other material), 0.9 mm (male preadult). Colour: bluish in alcohol. Integument secondary granules rather small.
Antennae about ⅔ of head length. Antennal segment I with 7 chaetae, antennal segment II with 12 (11 to 14) chaetae. Sensory organ of antennal segment III consisting of 2 small subcylindrical internal s-chaetae, 2 subcylindrical guard s-chaetae, 1 ventral s-microchaeta. Antennal segment IV with 7 subcylindrical s-chaetae (S1-4, S7-9), 1 small s-microchaeta placed between S7 and S8, and 1 small subapical organite. Apical vesicle simple ( Fig. 4B, C View FIG ).
Ocelli 6+6 (5+6, 6+7, 7+7), postantennal organ absent. Chaetotaxy of labrum: 4/5,3,4 ( Fig. 4E View FIG ). Labium with papillated chaeta L ( Fig. 4E View FIG ).
Dorsal chaetotaxy as in Figure 4A View FIG with relatively long (longer on hind terga), subequal chaetae and slightly longer s-chaetae (subequal to longest ordinary chaetae on abdominal terga IV-V), their formula per half tergum: 022/11111. Head with chaetae a0, d0 and 3 chaetae oc. Thoracic tergum I with 4+4 (with some variability: 2+2, 2+3, 3+3, 3+4) chaetae. Thoracic tergum II with 11+11 chaetae (4 chaetae Di including a2, 4 chaetae De including s-chaeta in third position of the p-row and 3 chaetae DL including 1 s-chaeta), and 1 s-microchaeta in DL. Thoracic tergum III with 10+10 chaetae (same arrangement as previous tergum, but without a2). Thoracic sterna II and III without chaetae. Abdominal tergum V with 2+2 chaetae between s-chaetae. Abdominal tergum VI with 3 anal spines. Some macrochaetae of posterior terga capitate (most obvious for the macrochaetae of abdominal tergum VI, and for chaetae in position 1, 3 and 4 in p-row of abdominal tergum V). Ventral abdominal chaetotaxy as in Figure 4F View FIG . Ventral tube with 4+4 chaetae. Abdominal sternum II with 6+6 (5+6, 4+5 and even less in juveniles), abdominal sternum III with 5+5 (5+6, 4+6 and even less in juveniles) chaetae Ve. Anal valves each with 3 chaetae hr.
Tibiotarsi I, II and III with 18, 18 and 17 chaetae respectively, of which 11 in distal whorl, without chaetae M ( Fig. 4D View FIG ).Tibiotarsus III without chaeta B7. No clavate tenent hairs. Femora I, II and III with 12, 11 and 10 chaetae respectively, each trochanter with 5 chaetae, coxae I, II and III with 3, 7-8 and 7-8 (and even less in juveniles) 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. Claw untoothed.
Tenaculum with 2 teeth on each ramus. Dens relatively long, with 3 chaetae. Mucro with small lamella, well separated from dens.
REMARK
The well-developed mucro of Friesea septem n. sp. recalls that of two other species of the genus: F.sublimis Macnamara, 1921 described from Canada ( Macnamara [1921], redescribed later by Rusek [1971]) and F. pins Thibaud & Weiner, 1997 described from Île des Pins ( New Caledonia; Thibaud & Weiner 1997), but these two species possess 8+8 eyes (6+6 eyes in the new species, with variations but never 8+8) and only 6 s-chaetae on antennal segment IV (7 in the new species).
| MNHN |
Museum National d'Histoire Naturelle |
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.