Superodontella ruta, 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 : 44-46

Superodontella ruta sp. n.

( Figs 20 –30)

Odontella pseudolamellifera : Klymovs'ka & Rukavets' 1988: 136, partim

Diagnosis. Postantennal organ about 0.9–1.0 times larger than ocellus B, amoeboid-like, with four lobes. Antennal segment with 7 subcylindrical curved sensilla. Head without seta c2, seta c3 present. Thoracic terga II and III with setae m1, m4 and m7 (m5 absent). Labium (per half) with five papillate setae and seven ordinary setae: F macrochaeta, f, G, A, e, d and c mesochaetae. Perilabial area with 3+3 subequal setae a. Abdominal sternum II with 3+3 setae, abdominal sternum III with 5+5 setae. Furca well developed with 5 setae on each dens, three internal setae are stronger and serrate. Each anal valve with three identical hr-setae. Empodium as a very small bristle. Anal spines present.

Type material. Holotype female and paratypes: two males and four females 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, Eastern Carpathians, Chornohora Range, Breckul Mnt., Vorochta village, subalpic meadow, Carex sp., soil, 1850 m alt., 20. viii.1993, coll. Ighor Kaprus'.

Other material. Ukraine, Eastern Carpathians, Chyvchyny Range, Burkut village, Sphagnum bog, wet moss, 15. viii.1990, adult female on slide, coll. Ighor Kaprus'; Ukraine, Eastern Carpathians, Chornohora Range, Pozhyzhevska Mnt., Vorochta village, subalpine meadow, Carex sp., soil, 1900 m alt., 15. iii.1982, adult female and adult male on slides, coll. Jevgenia Rukavets'.

Etymology. The species is named after romantic Carpathian flower “chervona ruta ” ( Rhododendron kotschyi ), which is praised in Ukrainian songs.

Description. Holotype (female) length 1.03 mm, paratypes (two males and four females) length 0.80– 0.97 mm. Colour in alcohol spotted pale bluish, ocular plate blue-black. Body integument strongly granulated. The central granulated area on head between d1 and d5 setae as a Fig. 24 , abdominal terga V–VI granulation as a Fig. 30.

Antennae about 2/3 of head length. Antennal segment I, II and III with 7, 10 and 12 setae respectively. Sensory organ of antennal segment III consisting of two small rounded internal sensilla and two long bent guard sensilla with ventral microsensillum present ( Fig. 21 ). Antennal segment IV chaetotaxy: with 23 ordinary setae, 12 trumpet-shaped setae and 7 subcylindrical curved sensilla, dorsoexternal microsensillum and subapical organite ( Figs 21–22 ).

Ocelli 5+5. Postantennal organ about 0.9–1.0 times of ocellus B, of amoeboid shape with four lobes ( Fig. 23 ). Buccal cone rather short. Mandibles present, maxillae with lamellae. Labral chaetotaxy 4–2 (as in S. huculica sp. nov. Fig. 15 ), prelabral setae absent. Labium (per half) with five papillate setae and seven ordinary setae: F macrochaeta, f, G, A, e, d and c mesochaetae ( Fig. 27 ). Perilabial area with 3+3 subequal setae a (a1–3), 1+1 setae m (m3) and 2+2 setae p (p1–2) ( Fig. 27 ).

Dorsal chaetotaxy as in Fig. 20 . Ordinary setae subequal, smooth and pointed, not long on thoracal terga I–III and abdominal terga I–IV, abdominal terga V–VI with longer and slightly serrate setae. Formula of sensory setae s per half tergum: 022/11111. Microsensilla present on thoracic tergum II and III. Head without setae a0, with seta c3. 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. Thoracic sterna without setae. Chaetotaxy of abdominal sterna as in Fig. 29 . Ventral tube with 3+3 setae. Abdominal sternum I with 1+1 setae at the base of tubus ventralis, abdominal sternum II with 3+3 setae, abdominal sternum III with 5+5 setae. The shape of manubrial vertige on abdominal sternum III as a Fig. 26 . Furca well developed with 5 setae on each dens, the three internal seta serrated and stronger then others. ( Fig. 28 ). Mucro typical of the genus, as long as the dens. Tenaculum with 3+3 teeth. Each anal valve with three identical hr-setae. Anal spines present.

Tibiotarsi I, II and III with 16, 16 and 15 setae, respectively. Whorl T without seta T3, whorl A with setae A1 and A7 prolonged and very slightly capitated, row B without setae B1 and B6, seta M present, seta B7 absent on tibiotarsus III. 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 an inner tooth in basal 1/3 and a single pair of lateral teeth ( Fig. 25 ). Empodium as a very small bristle.

Discussion. The new species is closest to Superodontella huculica by the similar type of labium and labrum, the type of chaetotaxy and the rudimental empodium, the presence of the tooth on claw, the number of sensilla on antenna IV. The species differ from each other by the shape of mucro (short in S. huculica , long in S. ruta ) and dental setae (equal in S. huculica , differentiated in S. ruta ), and the size of postantennal organ (as large as ocellus B in S. ruta , larger than ocellus B in S. huculica ). S. ruta sp. nov. is also similar to S. nana Cassagnau, 1954 sensu Jordana et al. (1997) known from France and Spain, but they differ in the labral chaetotaxy (4– 2 in the new species and 3–2– 2 in S. nana ), and in the shape of dental setae (identical in S. nana , differentiated in the new species).

Figures

FIGURES 20 – 29. Superodontella ruta sp. nov. 20, dorsal chaetotaxy; 21, antennal segments III and IV, dorsal side; 22, antennal segments III and IV, ventral side; 23, postantennal organ and ocelli; 24, central area of head between d 1 and d 5 setae; 25, distal part of leg III; 26, manubrial vertige on abdominal sternum III; 27, labial and perilabial chaetotaxy; 28, dens and mucro; 29, abdominal sterna II – VI; 30, abdominal terga V and VI.

FIGURES 11 – 19. Superodontella huculica sp. nov. 11, dorsal chaetotaxy; 12, antennal segments III and IV, dorsal side; 13, antennal segments III and IV, ventral side; 14, postantennal organ and ocelli; 15, labrum; 16, central area of head between d 1 and d 5 setae; 17, distal part of leg III; 18, dens and mucro; 19, ventral chaetotaxy of abdominal sterna II – VI.