Superodontella multisensillata, Kaprus', Ighor J. & Weiner, Wanda M., 2007

Kaprus', Ighor J. & Weiner, Wanda M., 2007, New species of Superodontella Stach, 1949 (Collembola, Odontellidae) from western part of Ukraine, Zootaxa 1516, pp. 39-48 : 39-40

Superodontella multisensillata sp. nov.

( Figs 1–10 )

Diagnosis. Postantennal organ about 1.3–1.4 times larger than ocellus B, amoeba-like shape, with four lobes, the posterior one very reduced. Antennal segment IV with 13–14 subcylindrical curved sensilla. Head only with seta c 3 in c-row. Thoracic terga II and III with setae m1, m4 (or 3/4) and m7=s. Labium (per half) with four papillate setae and three ordinary setae: F macrochaeta, f and G mesochaetae. Perilabial area with 3+3 subequal setae a, 1+1 setae m and 2+2 setae p. Abdominal sternum II with 4+4 setae, abdominal sternum III with 6+6 setae. Furca well developed with 5 setae on each dens, the two internal and one external setae stronger. Each anal valve with three identical hr-setae. Empodium absent. Anal spines present.

Type material. Holotype female and paratype male in the State Museum of Natural History, Ukrainian National Academy of Science, L’viv; paratype female in the Institute of Systematics and Evolution of Animals, Polish Academy of Sciences, Cracow.

Type locality. Ukraine, Podillya Region, Kytaihorod village, Carpinetum forest, litter, 17.vi.1995, coll. Ighor Kaprus'.

Other material. Ukraine, Eastern Carpathians, Chorna Mt., Vynohradove town, Quercetum forest, litter, 23. iv.1987, adult female on slide, coll. Ighor Kaprus'; Chernivets'ka district, Vyzhenka villige, Fagaetum forest, wood decompose on the ground, 6.vi.1992, adult male on slide, coll. Volodymyr Melamud.

Etymology. The species is named for its numerous sensilla on antennal segment IV.

Description. Holotype (female) length 1.09 mm, paratype (female and male) length 1.19–1.22 mm. Colour in alcohol spotted pale bluish, ocular plate blue-black. Body integument strongly granulated. The central granulated area on head between d1–d5 and sd5 setae as in Fig. 5 , abdominal terga V–VI with very coarse granulation as in Fig. 10 .

Antennae of triangular shape, about 2/3 of head length. Antennal segment I, II and III with 7,10 and 13 setae respectively. Sensory organ of antennal segment III consisting of two small bent internal sensilla and two bent guard sensilla, ventral microsensillum also present ( Fig. 2 ). Antennal segment IV with about 20 ordinary setae, 11 trumpet-shaped setae and 13–14 subcylindrical curved sensilla, dorsoexternal microsensillum and subapical organite ( Figs. 2–3 ).

Ocelli 5+5. Postantennal organ about 1.3–1.4 times larger than ocellus B, amoeboid in shape, with four lobes, the posterior one very reduced ( Fig. 4 ). Buccal cone rather short. Mandible invisible, maxillae with lamellae. Labral chaetotaxy 4–2, prelabral setae absent. Labium (per half) with four papillate setae and three ordinary setae: F macrochaeta, f and G mesochaetae ( Fig. 7 ). Perilabial area with 3+3 subequal setae a (a1–3), 1+1 setae m (m3) and 2+2 setae p (p1–2). Seta p1 twice as long as p2.

Dorsal chaetotaxy as in Fig. 1 . Ordinary setae subequal, smooth and pointed, not long on thoracal terga I– III and abdominal terga I–V. On abdominal tergum VI setae are longer and slightly serrated. Formula of sensory setae s per half tergum: 022/11111. Microsensilla present on thoracic tergum II and III. Head with seta c3, without a0. Thoracic tergum I with 4+4 setae, thoracic terga II and III with setae m1, m4 and m7 (m5 absent). Abdominal terga I–IV with seta s=p5 (seta p3 absent). Thoracic sterna without setae. Chaetotaxy of abdominal sternum I–III as in Fig. 9 . Ventral tube with 3+3 setae, abdominal sternum I with 1+1 setae at the base of tubus ventralis, abdominal sternum II with 4+4 setae, abdominal sternum III with 6+6 setae. Anal spines present. Tenaculum with 3+3 teeth. Furca well developed with 5 setae on each dens, the two internal and one external setae stronger ( Fig. 8 ). Mucro with two lobes and apex slightly hooked, equal in length to the dentes. Each anal valve with three hr-setae.

Tibiotarsi I, II and III with 16, 16 and 15 setae, respectively. Femora I, II and III with 12, 11 and 10 setae, trochanters I, II and III with 5, 5 and 4 setae, coxae I, II and III with 3, 5 and 5 setae, 2.subcoxae I, II and III with 0, 2 and 2 setae, 1.subcoxae I, II and III with 1, 2 and 2 setae, respectively. Claw with inner tooth about 1/ 3 from base and a single pair of lateral teeth ( Fig. 6 ). Empodial appendage absent.

Discussion. The new species is closest to Superodontella lolae ( Simón, 1978) from Spain, having the same type of labium and body chaetotaxy, small anal spines and lack of empodium. They differ in the number of sensilla on antennal segment IV (13–14 sensilla in the new species, 9 in S. lolae ), and in size of the postantennal organ (1.3–1.4 times larger than ocellus B in the new species, and of equal size in S. lolae according to Simón 1978). The microsensilla ms in S. lolae is placed entirely in the lateral position, behind the seta m7=s and in the new species between setae m7=s and p6.

Figures

FIGURES 1 – 10. Superodontella multisensillata sp. nov. 1, dorsal chaetotaxy; 2, antennal segments III and IV, dorsal side; 3, antennal segments III and IV, ventral side; 4, postantennal organ and ocelli; 5, central area of head between d 1 and d 5 setae; 6, distal part of leg III; 7, labial and perilabial chaetotaxy; 8, dens and mucro; 9, abdominal sterna I – III; 10, abdominal tergum VI.