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A New Palearctic Species of the Genus Sitticus Simon with Notes on Related

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A New Palearctic Species of the Genus Sitticus Simon with Notes on Related Bull. Br. arachnol. Soc. (1997) 10 (7), 225–233 225 A new Palearctic species of the genus Sitticus who listed them under the name rupicola. He (op. cit., Simon, with notes on related species in the floricola p. 17) found differences in coloration between these and group (Araneae, Salticidae) specimens from the Tatra Mts. but thought that the discrepancies were probably due to geographical variation Dmitri V. Logunov ‘‘which deserves separate research, perhaps’’. Further Zoological Museum, study of specimens from Estonia shows that they belong Institute for Systematics and Ecology of Animals, to S. inexpectus, as suspected by Kronestedt (1983). Frunze street 11, Novosibirsk 630091, Russia The presence of S. rupicola in Britain has for many and years not been questioned despite biogeographical reasons for doing so. [In fact, Locket & Millidge (1951: Torbjörn Kronestedt 232) had a reservation regarding the identity of the Department of Entomology, British specimens.] After comparison with Central Swedish Museum of Natural History, European material of S. rupicola as well as material of Box 50007, SE-104 05 Stockholm, Sweden S. inexpectus we conclude that it is the latter species which occurs in Britain. Summary The occurrence of S. inexpectus in Poland was discov- Sitticus inexpectus sp.n. (from Britain, C. and N. Europe, ered when one of us (DVL) re-examined a specimen Russia, Kazakhstan and Kirghizstan) is described and dis- previously identified as S. rupicola (and listed under that tribution maps provided. It is closely related to S. caricis name in Prószyn´ski, 1961). The presence of S. inexpectus (Westring) and S. rupicola (C. L. Koch) and has previously been misidentified as either of these. New faunistic data in Germany and Austria was revealed from material for S. monstrabilis Logunov are given. Illustrations are kindly placed at our disposal by German and Austrian provided for the four species mentioned. colleagues, respectively. Sitticus inexpectus has repeatedly been recorded from Introduction Western Asiatic areas of the former USSR as either The genus Sitticus has been the subject of consider- S. rupicola (Charitonov, 1969; Danilov & Logunov, able interest in recent years, several of its species being 1993) or S. caricis (Nenilin, 1984a, 1985: in part). allocated to separate informal groups by shared charac- Finally, we provide new faunistic data for S. monstra- teristics in the copulatory organs (Prószyn´ski, 1968, bilis, hitherto known only from E. Kazakhstan 1971, 1973, 1980, 1983; Harm, 1973). Even a provisional (Logunov, 1992). Thus, a revised list of the floricola phyletic tree has been proposed (Prószyn´ski, 1983) with- species group now includes the following twelve species: out, however, supporting analysis of the characters used. In his revision of the floricola species group, Sitticus caricis (Westring, 1861)—Europe, Far East Prószyn´ski (1980) dealt with nine species, of which S. S. cutleri Prószyn´ski, 1980—C. and E. Siberia, N. gertschi Prószyn´ski was later synonymised with S. cutleri America Prószyn´ski by Nenilin (1984b). Logunov (1992) recently S. floricola (C. L. Koch, 1837)—Palaearctic described two additional new species from the same S. inexpectus sp.n.—W., C. and N. Europe, Russia, SE group, S. monstrabilis and S. pulchellus. Also, S. sylves- Kazakhstan, Kirghizstan tris Emerton has been recognised by W. P. Maddison as S. magnus Chamberlin & Ivie, 1944—N. America a separate species, being closely related to S. caricis S. monstrabilis Logunov, 1992—SE Kazakhstan, (Westring) (B. Cutler, pers. comm.). Thus, up to now 11 Kirghizstan valid species have been documented from this species S. palustris (Peckham & Peckham, 1883)—N. America group. In the present contribution a new sibling species [as S. floricola palustris in Prószyn´ski (1980)] of S. caricis is described. S. pulchellus Logunov, 1992—S. Kazakhstan, Sitticus inexpectus sp.n. has been recorded for a long Kirghizstan [not in the saxicola group as suggested by time as either S. caricis or S. rupicola (C. L. Koch). Logunov (1992); description of female by Logunov Kronestedt (1983) was the first author who reported it as (1995)] probably an undescribed Sitticus species (but did not S. rupicola (C. L. Koch, 1837)—C. and S. Europe name it). The specimens were found during a survey of (Balkans) the spider fauna of an extensive steppe-like area on S. striatus Emerton, 1911—N. America, Europe (?) (see limestone on the island of Öland in SE Sweden. Speci- Prószyn´ski, 1980) mens (females only) identified as S. rupicola had pre- S. sylvestris Emerton, 1891—N. America viously been reported from the same habitat on Öland S. zimmermanni (Simon, 1877)—Europe, W. Siberia (Lohmander, 1942; Tullgren, 1944). Though the epi- gynes of the latter are now lacking (specimens preserved Among these, S. caricis, S. inexpectus, S. magnus and in the Natural History Museum, Gothenburg), it is most S. rupicola (and probably S. sylvestris, see above) form plausible that they belong to S. inexpectus. Kronestedt a set of species with very similar configuration of (1983) also mentioned the presence of this species on the the female copulatory organ. We may refer to them island of Gotland. collectively as the rupicola complex. Material identified as S. rupicola has been known As salticids are especially suitable for studying court- from coastal areas in Estonia (Vilbaste, 1969, 1987). ship behaviour, future ethotaxonomical investigations Estonian specimens were studied by Prószyn´ski (1980) within this complex may provide support for the present 226 A new species of Sitticus limitation or for further splitting of species based on (S. caricis usually has no specific colour markings, cf. morphological characteristics. For biogeographical Fig. 47), male palp with more conspicuous white reasons, it would be interesting to compare courtship in pilosity, and size of epigynal pocket (cf. Figs. 21–26 with European and certain Asian populations currently as- 28). For habitus, see also Jones [1983: p. 153, S. inexpec- signed to S. inexpectus. So far we have not found any tus (sub S. rupicola, specimen from Britain, D. Jones morphological characteristics which we regard as deci- pers. comm.) and S. caricis]. From S. rupicola the new sive for separating European from Asian specimens at species differs by the pattern of white hairs on male the species level. We cannot, however, exclude carapace (cf. Fig. 40 with 41), proportions of the male differences at some infraspecific level. palp (cf. Fig. 10 with 12), and configuration of the internal female genitalia (cf. Figs. 21–26, 30 with 27, 29). Material and abbreviations Description: Male holotype: Measurements: Carapace The specimens examined have been borrowed from/ 1.85 long, 1.38 wide, 0.80 high at PLE. Ocular area 0.83 will be housed in the following museums/private collec- long, 1.10 wide anteriorly and 1.13 wide posteriorly. tions: BMNH=Natural History Museum, London, Diameter of AME 0.33. Abdomen 1.75 long, 1.48 wide. England (P. D. Hillyard); CPH=Peter Harvey, Grays, Cheliceral length 0.63. Clypeal height 0.14. Length of leg England; CPM=Peter Merrett, Swanage, England; segments: CTB=Theo Blick, Hummeltal, Germany; CVR= Fe Pt Ti Mt Ta Total Vygandas Relys, Vilnius, Lithuania; ISE=Zoological I 1.08 0.55 0.75 0.65 0.40 3.43 II 0.85 0.50 0.55 0.45 0.38 2.73 Museum, Institute for Systematics and Ecology of III 0.83 0.45 0.48 0.53 0.35 2.64 Animals, Novosibirsk, Russia (D. V. Logunov); IZBE= IV 1.33 0.60 0.83 0.70 0.48 3.94 Institute of Zoology and Botany, Estonian Academy of Sciences, Tartu, Estonia (J. Viidalepp); IZW=Museum and Institute of Zoology, Warszawa, Poland (W. Je¸dryczkowski); NMB=Naturhistorisches Museum, Basel, Switzerland (A. Hänggi); NMW=Natur- historisches Museum, Wien, Austria (J. Gruber); NRS=Swedish Museum of Natural History, Stockholm, Sweden (T. Kronestedt); PSU=Zoological Department, Perm State University, Perm, Russia (S. L. Esyunin); ZIP=Zoological Institute of Russian Acad- emy of Sciences, St. Petersburg, Russia (V. I. Ovtsharenko); ZMB=Naturhistorisches Museum, Berlin, Germany (M. Moritz); ZMMU=Zoological Museum of Moscow State University, Moscow, Russia (K. G. Mikhailov); ZMUU=Zoological Museum of Uppsala University, Uppsala, Sweden (T. Jaenson). Abbreviations used: AME=anterior median eyes, ALE=anterior lateral eyes, PME=posterior median eyes, PLE=posterior lateral eyes, d=dorsal, v=ventral, pr=prolateral, rt=retrolateral, ap=apical, Fe=femur, Pt=patella, Ti=tibia, Mt=metatarsus, Ta=tarsus. For leg spination, the system adopted by Ono (1988) is used. Measurements are given in millimetres. Sitticus inexpectus, sp.n. (Figs. 1–6, 10, 13–17, 21–26, 30, 31, 36–40, 42–44) Sitticus rupicola (misidentification): Tullgren, 1944: 28–29 (in part: at least illustrations of male palp and vulva were apparently made from foreign material of S. rupicola); Locket & Millidge, 1951: 232, figs. 112C, 113D (78); Vilbaste, 1969: 183–185, figs. 152, 153 (78); Jones, 1983: 152, fig. on p. 153 (8 habitus); Roberts, 1985: 126, fig. 52d, g (78). Sitticus sp.: Kronestedt, 1983: 196–198, fig. 9 (8 habitus). Type: Holotype 7 (NRS) from Sweden: Öland, Resmo, W of Lake Möckelmossen, pitfall trap, 8–20 June 1978 (T. Kronestedt). Etymology: The species name is derived from a Latin word meaning unexpected. Figs. 1–9: Left male palp (2, 5, 8 in retrolateral view, others in ventral view). 1–6 Sitticus inexpectus sp.n. (1,2 holotype from Diagnosis (cf. also Table 1). Sitticus inexpectus is Sweden, 3 from England, 4-6 from Kirghizstan); 7, 8 closely related to S. caricis and S. rupicola. From S. S. caricis (Sweden); 9 S. rupicola (Austria). Scale caricis it can be distinguished by body coloration lines=0.1 mm. D. V. Logunov & T. Kronestedt 227 Leg spination: Leg I: Fe d 0-1-1-2; Pt pr 0-1-0; Ti pr 1-1, v 2-2-2ap; Mt v 2-2ap.
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