Deuteraphorura schoenviszkyi ( Loksa, 1967 )

Parimuchová, Andrea & Kováč, Ľubomír, 2016, Redescription of two troglobiotic species of Deuteraphorura Absolon, 1901 (Collembola, Onychiuridae) from the Western Carpathians, Zootaxa 4168 (2), pp. 327-340 : 333-335

Deuteraphorura schoenviszkyi ( Loksa, 1967)

Figs 11–13 , Tab. 1

Onychiurus (Onychiurus) schoenviszkyi Loksa 1967: 292 Onychiurus schöenviszkyi sp. nov. Bajomi 1968: 121 Onychiurus schoenviszkyi Bajomi 1969: 243

Onychiurus schoeviszki Traser 1999: 49

Orthonychiurus schoenviszkyi Dányi & Traser 2007: 23 Orthonychiurus schoenviszkyi Dányi 2011: 423

Diagnosis. Dorsal pso formula: 33/033/33343, ventral: 2/000/0111, subcoxae 1 of legs I–III with 1 pso each. Subcoxae 2 of legs I–III with 0, 3, 3 chaetae, respectively. C-verticil of Tita I –III with 2, 1, 1 chaetae, respectively. Neotype, female. Slovakia: Slovak and Aggtelek Karst , Gombasecká jaskyňa Cave (approximately 15 km west from the type locality, in the same karst area), “ Mramorová sieň” Hall, 1 female (Nr. 920-09), collected on rotten wood, 1.x.2009, leg P. Ľuptáčik . Neotype herein designated, deposited in IBE FS UPJS, Košice [Type material not specified in the original description and lost; type locality: Hungary, Slovak and Aggtelek Karst, Kifli Shaft Cave].

Other material from type karst area. Slovakia: Slovak and Aggtelek Karst , Gombasecká jaskyňa Cave, “ Blatistá chodba” passage, 2 females, on surface of water pool, 22.x.1999, leg. Ľ. Kováč ; ibid., “ Mramorová sieň” Hall , 1 female, on rotten wood, 3.v.2008, leg P. Ľuptáčik; Majkova jaskyňa Cave, “ Západná chodba” passage, 2 females, on bait, 15.v.1998, leg. Ľ. Kováč ; Stará Brzotínska Cave , chamber 50 m from entrance, 1 male, on bait, 9.vii.1998, leg. Ľ. Kováč. Examined material deposited in IBE FS UPJS, Košice.

Redescription. Body length 1.3–1.5 mm, shape cylindrical. Colour white in ethyl alcohol. Citicular granulation rather fine and uniform. Antennae almost as long as head, area antennalis well marked. PAO with 13– 14 compound vesicles. Ant. I with 8 chaetae in one row, Ant. II with 14 chaetae. AOIII with 5 papillae, 5 guard chaetae, 2 sensory rods shorter than papillae, 2 smooth sensory clubs and lateral ms. Apical organite simple. Lateral ms on Ant IV placed basally, equally long as sensory rod of AOIII. Labium of AB-type, with 6 proximal chaetae. Basomedian field with 4 chaetae. Maxillary outer lobe simple with 1 basal chaeta and 2 sublobal hairs. Maxillary palp in apical third slightly serrated. Labral formula as 4/142 (as in Fig. 9 ).

Dorsal pso formula: 33/033/33343; head dorsally with 3 anterior pso arranged in triangle and 3 posterior; lateral pso hardly visible, located at hind margin of head, more distant from 2 axial pso. Ventral pso formula: 2/000/ 0111 ( Fig. 13 ); head ventrally with 2 pso: anterior and postero-lateral pso. Subcoxae 1 of legs I–III with 1, 1, 1 pso respectively. Psx on sterna and legs not seen. Th. I with 7–9 chaetae per half, Th. II–III with 4+4 axial chaetae and 1 lateral ms. VT with 6–7 chaetae per half: 4 chaetae in proximal and 2–3 chaetae in distal row, basal chaetae absent ( Fig. 12 ). MVO present in form of thickened chaetae: 4 on Abd. II sternum and 6 on Abd. III sternum (shape as in Fig. 15 ). Furca remnant with 2+2 thin chaetae in one row, ma row with 2+2 chaetae in level of dental microchaetae, mm row with 3+3 chaetae and mp row with 2+2 chaetae, external ones as macrochaetae.

Subcoxae 1 of legs I–III with 3, 4, 4 chaetae, subcoxae 2 with 0, 3, 3 chaetae, coxae with 3, 10, 12–13 chaetae, trochanter with 9 chaetae each and femora with 15, 14–15, 14 chaetae, respectively. Tita I with 6+M chaetae in B row (B1 absent) and 2 chaetae in C row, Tita II with 7+M chaetae in B-row and 1 chaeta in C-row and Tita III with 6+M chaetae in B row and 1 chaeta in C row. Claw elongated without teeth, length/width ratio 2.4–2.9. Empodium with small basal lamella, tip of filament reaching two-thirds of the claw length ( Fig. 11 ).

Remarks. As in Deuteraphorura kratochvili , the type material of D. schoenviszkyi is inaccessible to study due to unknown place of its deposition (L. Dányi, Hungarian Natural History Museum in Budapest, pers. comm.), thus considered to be lost. Specification of the material is following: Hungary, Slovak and Aggtelek Karst, Kifli Shaft Cave, 4.viii.1965, leg. I. Loksa. The specimens of recently collected D. schoenviszkyi in caves of the Slovak and Aggtelek Karst differ from the original description ( Loksa 1967) by higher number of pso on Th. II (3 vs. 2), ventral pso on head (2 vs. 1) and papillae in AOIII (5 vs. 4). We consider this form with only 1 pso on subcoxae and Abd. II –IV sterna identical to Loksa ´s species in spite of the outlined differences that are most probably the result of inaccurate original description.

Distribution. The species represent troglobiotic and endemic form with distribution range restricted to the Slovak and Aggtelek Karst situated in southern Slovakia and northeastern Hungary.

Discussion. D. schoenviszkyi is the only representative of the species-group lacking pso on Th.I that has reduced number of pso on abdominal sterna (0,1,1,1) and subcoxae 1 of legs I-III (1,1,1). It is rather similar to D. kratochvili but clearly differs by dorsal (33/033/33343 vs 33/033/33354) and ventral (2/000/0111 vs 2-3/00(1)0(1)/ 2212 pseudocellar formula and the number of pseudocelli on subcoxae 1 (1,1,1 vs 2,2,2) ( Tab. 1 ).

Figures

FIGURE 10 ‒ 13. D. kratochvili. 10 head and Th. I – III ventrally. D. schoenviszkyi. 11. claw of leg I. 12, ventral tube, frontal view. 13. Abd. II – VI ventrally.

FIGURES 5 – 9. D. kratochvili. 5, Antennae ‒‒ ms, sensory rods and clubs of AOIII enlarged (lateral view). 6, leg III, lateral view. 7, maxillary outer lobe. 8, Abd. II – III sternum with MVO. 9, labrum.

FIGURES 14 – 15. D. kratochvili. 14, MVO, adult male. 15, MVO, subadult male.