Lepidocyrtus tomosvaryi, Winkler, Daniel & Traser, György N., 2012

Winkler, Daniel & Traser, György N., 2012, Explanation of the European Lepidocyrtus pallidus – serbicus group (Collembola, Entomobryidae), with description of new species from Hungary, Zootaxa 3394, pp. 35-47 : 36-42

Lepidocyrtus tomosvaryi sp. nov.

Figs 1–24 , Tab 1

Type locality. Tüskevár, com. Veszprém ( Hungary), 146 m above sea level, lat/long coordinates N47°7'12.55"; E17°20'3.90", collected from forest litter near the stream Torna.

Type material. Holotype: female on slide, leg. D. Winkler, 16.10.2011. Paratypes: 15 specimens (10 females and 5 males) collected together with the holotype. The holotype (slide code: HNHM-collpr-0614) and 8 paratypes (3 females mounted on slide, slide codes: HNHM-collpr-0615, HNHM-collpr-0616, HNHM-collpr-0617; 3 females and 2 males in alcohol, vial code HNHM-coll-0774) are deposited in the Hungarian Natural History Museum, Budapest; 7 paratypes (4 females and 3 males on slides, slide codes: LEP-TUS-2012-001, LEP-TUS- 2012-002, LEP-TUS-2012-003, LEP-TUS-2012-004, LEP-TUS-2012-005, LEP-TUS-2012-006, LEP-TUS-2012- 007) are saved in the collection of the authors at the University of West Hungary, Faculty of Forestry, Sopron.

Other material. Same data as type material: 50 spec. preserved in 70% alcohol in D. Winkler’s collection.

Etymology. the new species is named in honour on the late Hungarian naturalist and Collembola scientist Ödön Tömösváry (1852–1884) world famous for discovering and describing the peculiar sensory organs of the Myriapods known as Tömösváry’s organ that may actually be homologous to the postantennal organ of Collembola .

Diagnosis. Relatively small (1 mm of maximum length of body), pale Lepidocyrtus species. Antennae and legs without scales. All labial setae (M1M2R*EL1L2) in the “p row” are well developed and ciliated but R* is shortened. Apical bulb on ant.IV is absent. Dorsal cephalic and body macrochaetae formula as R0R1s R1R2STS o/00/ 0101+2. Abd.II dorso-medial chaetotaxy between the two trichobotria as a2p, a2, m3, p4. The main difference of the new species from all European Lepidocyrtus is the presence of a small dental tubercle at the dorsointernal proximal position of the dens.

Description. Maximum body length 1.0 mm (without head nor furca). Mesothorax not projecting over the head ( Fig. 1 ). Predominantly pale, colorless species, except for the dark ocular areas, some scattered pigment between the antennae on the front, and bluish shade on ant.II–IV and on the coxae. Light brown colored scales densely cover the whole body and the ventral surface of the furca, but they are absent on the ventral tube, on the antennae and on the legs, except for the coxae.

Antennae rather short, antennal length to head diagonal length ratio is about 1.6 (head diagonal measured from the cervical edge to the apex of the mouth part). Relation of the antennal joints I–IV as 1: 1.8: 1.8: 2.7. Antennal base with two pseudopores on the inner side and with an antennobasal-organ on the outer side. Ant.II organ with one short cylindrical blunt seta below the apical row ( Fig. 2 ). Ant. III organ with two bent sensillae partially behind a cuticular fold, guarded with one slightly bent short sensilla on both side ( Fig. 3 ). Ant.IV without apical bulb, but with a small subapical peg along with a short spine-like seta ( Fig. 4 ).

Eye patches dark blue, eyes well visible. Diameters of ocelli A–F about the same. Ocelli G and H are somewhat smaller (A:G ≈ 1.2; A:H ≈ 1.3) but always well visible. Ocellus G is more oval than circle. Interocular chaetotaxy ( Fig 5 .) with s, t, p setae and 2–3 intraocular scales.

Mouthpart with the frontoclypeal area as in Fig. 6 . Labrum intrusion V-shaped between the most anterior labral setae (= 3rd row). Labral edge with four small but distinguishably separated labral papillae ( Fig. 7 ), each one with a small conical spine. Medial papillae somewhat smaller than lateral ones. Arrangement of setae on the labrum 4/ 554, prelabral setae are ciliated, labral setae smooth. Number of sublobal hairs 4 ( Fig. 8 ). Number of guard setae on the five papillae A,B,C,D,E in the labial appendage as 0,5,0,3,4+1 lateral process, respectively. Lateral process on the papilla E ( Fig. 9 ) not reaching the top of the papilla. Labium chaetotaxy formed by 5 smooth proximal and 5 smooth "a" setae and in the basal row by ciliated setae M1M2R*EL1L2 ( Fig. 10 ) with R* smaller and less ciliated than the other setae (in low magnification seemingly smooth among the ciliated setae). Ratio of R*/M~0.7. Ventral cephalic grove with 4+4 ciliated setae. Dorsal cephalic macrochaetae chaetotaxy R0R1R2STS0, but also with a small R1s between R0 and R1 and with a short unpaired seta (R0S) in front of R0 ( Fig. 11 ). Number of macrochaetae "A" on the head 10+10 ( Fig. 11 ).

Mesothorax without macrochaetae in the lateral position (p3=mesochaeta). Dorsal body macrochaetae 00/ 0101+2.

The pattern of microchaetae between the dorsomedial pseudopori on the thorax and abdomen has probably little taxonomic value ( Hüther 1971), notwithstanding we present it here in Figs. 12 and 13 . Chaetotaxy of abd.II- III. as in Figs 14–15 . Abd.II chaetotaxy between the two dorso-medial trichobothria paBq2 (q1 absent) using Gisin’s symbols ( Gisin 1967), while a2p, a2, m3, p4 (m3e absent) following Mateos (2008a). Chaetotaxy and trichobothrial complex on abd.IV as on Figs 16–17 . Macrochaeta F2 above macrochaeta E3. The ratio of distances between macrochaetae C1-B5 / B5–B6 on abd.IV is about 1. Dorsal chaetotaxy of abd.V–VI as on Fig. 13 .

Unguis and unguiculus as on Fig 18 a and b. Unguis with sub-equal paired basal teeth and with two more unpaired teeth: one very small apical one, and below it, with another inner tooth. Apart from the two very small lateral teeth an outer tooth is also present. Unguiculus lanceolate, without denticles along the outer lamella. Ratio of supraempodial seta (smooth seta on tibiotarsus III opposite to the tenent hair) / unguiculus is around 1.00. Trochanteral organ with 10–11 smooth spiny setae forming a ±V-shaped pattern.

Ventral tube ( Fig. 19 a and b) with 13 laterodistal setae (8 ciliated and 5 smooth), 11–13 ciliated setae on the anterior side and 8+8 smooth setae on the posterior side.

Manubrial plate with 2+3(4) setae on both side of the 2 psp. Dens dorsally with a proximal blunt, spherical, well visible dental tubercle ( Figs 20 and 21 ) associated with four setae ( Fig. 22 ). Mucro as on Fig. 23 . Manubrium base dorsally with 3 psp ( Fig 24 ), ventrally densely covered with scales, at the apical-medial part with 2+2 terminal setae.

Variability. The morphological characters are relatively stable. In one out of the 27 specimens examined the dental tubercle was almost conical-shaped. Other irregularity can be observed in the trichobotrial complex of abd.IV in one specimen, where a smooth michrochaeta is present anteriorly to the m seta.

Ecology and distribution. The specimens of L. tomosvaryi sp.nov. was found in a lowland hornbeampedunculate-oak (Querco-robori Carpinetum) forest litter near the stream Torna. This Lepidocyrtus is a silvicol, phytodetriticol species, and, based on the soil characteristics, acidophilic and hygrophil as well.

Affinities. Using Mateos' key to the European species of Lepidocyrtus ( Mateos 2008a) , the new species keys out nearest to L. serbicus . However, the mentioned small dental tubercle and some more differences compared with the descriptions from different sources (see Table 1) clearly distinguish L. tomosvaryi sp.nov. from L. serbicus . The most important differential characters of the new species are summarized in Table 1.

specified); Max length: maximum body length in mm (without head nor furca); Eyes G & H: presence or absence and size of

eyes G & H; Apex of ant.II: number of sensillae on the apex of antennal segment II; Apical bulb: presence or absence of apical

papilla on ant.IV; Labial papilla E: position of lateral process in relation to the top of the papilla; Ventral groove: number of

setae along the ventral cephalic groove; Sublobal hairs: number of sublobal hairs on the maxillary outer lobe; Labral papillae:

type and/or number of labral papillae; Abd.IV trichobotria: shape of anterior accessorial setae 'a' and 'm'; Ventral tube: number

of latero-distal setae on the ventral tube; Troc. organ: maximum number of setae of trochanteral organ of third legs; Manubrial

plate: maximum number of inner and outer setae of manubrial plate; Dental tubercle: presence or absence of a basal dental

tubercle on the dorsal side of the dens.

Features L. serbicus L. tomosvaryi sp.nov. comments/sources

Figures

FIGURES 1 – 6. L. tomosvaryi sp. nov.: 1, habitus; 2, ant. II chaetotaxy; 3, ant. III sensillar organ; 4, apex of ant. IV.; 5, eye patch and interocular chaetotaxy; 6, mouth region and frontoclypeal area.

FIGURES 7 – 13. L. tomosvaryi sp. nov.: 7, labral papillae; 8, maxillary outer lobe with sublobal hairs; 9, outer labial papilla with lateral process; 10, labial triangle; 11, dorsal head chaetotaxy; 12, th. II – III and abd. I dorsal chaetotaxy; 13, abd. IV – VI dorso-medial chaetotaxy.

FIGURES 14 – 15. L. tomosvaryi sp. nov.: 14, abd. II complete chaetotaxy (right side), broad circles with triangle inside—broad ciliated macrochaetae, psp—pseudoporus; 15. abd. III complete chaetotaxy (left side), broad circles with triangle inside—broad ciliated macrochaetae, psp—pseudoporus.

FIGURES 16 – 17. L. tomosvaryi sp. nov.: 16, abd. IV chaetotaxy, broad circles with triangle inside—broad ciliated macrochaetae, doubled circles—long thin ciliated macrochaeta (smooth mesochaetae and s setae are illustrated), psp—pseudoporus; 17, abd. IV trichobotrial complex.

FIGURES 18 – 19. L. tomosvaryi sp. nov.: 18, unguis and unguiculus (a, leg II; b, leg III); 19, ventral tube (a, anterior view; b, posterior view).

FIGURE 20. L. tomosvaryi sp. nov.: dens with small dental tubercle (Photo: D. Winkler).

FIGURES 21 – 24. L. tomosvaryi sp. nov.: 21, dens basal part with small dental tubercle, dorsal view; 22, dens dorsally with the small dental tubercle and the associated 4 setae; 23 mucro and apical part of dens; 24, chaetotaxy of anal lobe and basal part of manubrium, psp—pseudoporus.