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Bulletin Zoologisch Museum ■ I NIVERSITEIT VAN AMSTERDAM Vol. 10 No. 12 1985 On some slugs from the isle of Andros, Greece, including the descriptions of two new species (Gastropoda: Pulmonata) A.J. de Winter & L.J.M. Butot Abstract Deroceras and D korthionensis are described from the Isle of johannae n.sp. n.sp. Andros, data of Greece. Distributional Limax aff. conemenosi Boettger, Tandonia sowerbyi Férussac, as well of milacid Attention is drawn in the as an unidentified are provided. to a peculiarity genital anatomy of L. aff. conemenosi , in comparison with specimens attributed to this species from outside Greece. The material has been deposited in ZMA. INTRODUCTION 1823) (cf. Simroth, 1889 as Amalia carinata (Risso, 1826)). In this paper we will add three more species: two Deroceras species, new to Andros is the northernmost island of the Cycla- science, and a Milax or Tandonia, of which on- des visited in 1984 but which differs Archipelago. It was April ly juveniles were available, the his wife. This from in external fea- by second author and paper conspiciously T. sowerbyi deals with the collected this only slugs during tures . landsnails will dealt indebted Prof. trip. The remaining be We are to A. Wiktor, Wroclaw, with elsewhere (Butot, in prep.). Poland, for his kindness in discussing the iden- far few authors have attention of So paid to tity our specimens. the slug fauna of this island. Simroth' s (1889) Live specimens were drowned in water before the first and extensive in alcohol 70%. All paper was most one, being preserved measure- other authors only quoted his results (Von Mar- ments have been taken from preserved material. tens, 1889; Wagner, 1940). Mylonas (1982) gave Abbreviations used.- A, atrium; AM, atrial a summary of the malacofauna of Andros and also muscles; APP, penial appendage; L, liver; OD, added some new records of slugs. Untill now the free oviduct; OT, ovotestis; P, prostate; PC, have been retractor following slugs reported: Limax cone- penial caecum; PE, penis; PR, penial menosi O. Boettger, 1882; Deroceras berytensis muscle; R, rectum; RMNH, Rijksmuseum van Natuur- var. andrios (Simroth, 1889); D. oertzeni (Sim- lijke Historié, Leiden; S, sphermatheca; SD, roth, 1889); D. thersites (Simroth, 1886) (cf. spermathecal duct; SOD, spermoviduct; VD, vas Tandonia Museum Amsterdam. de Mylones, 1982) ; sowerbyi (Férussac, deferens; ZMA, Zoologisch 78 1-2. Limax conemenosi Figs. aff. Boettger. 1, anterior genitalia; 2, apical part of penis. LIMACIDAE fig. 3; Hudec & Vasatko, 1973, fig. 6; Rahle, 1977, 2; Wiktor, 1983, 63) this fig. fig. , Limax (Limax) aff. conemenosi distance is at least twice the length of the 1882 Simroth O. Boettger, penial caecum. (1889, fig. 8) also exam- (figs. 1-2) ined specimens from the Isle of Andros, and his in drawings are accordance with our observa- tion. It must be stressed that, as far as we Material.- are aware, nothing has been published on the 1 juvenile specimen (length 45 mm), Stavrope- 20 of da (= km SW of the town Andros), under a anatomy of type specimens or even topotypes of rock; UTM LB1184; 21-IV-1984. 1 adult specimen L. conemenosi. Boettger's original description (length 142 mm!), just outside Andros, along the road to Stavropeda, under a rock; UTM only refers to the external characters. Except LB1890; 27-IV-1984. for Simroth all with (1889), papers dealing the anatomy of this species refer to Jugoslavian - Discussion. and Bulgarian specimens. It is therefore possi- We hesitate to identify these specimens with ble, if this feature proves to be constant, L. conemenosi, because of the short distance that we are dealing with two distinct although between the insertion of the penial retractor closely related (sub)species. muscle and the of the which The of adult is entry vas deferens, length our specimen (142 nun) the of the far than the maximum is about equal to length penial larger length ever record- all of the ed for L. conemenosi Wik- caecum. In nearly published drawings (80 mm, according to penis of L. conemenosi (Urbanski & Wiktor, 1968, tor, 1983). 79 3-6. Deroceras anterior viewed from the Figs. johannae n.sp., holotype. 3, genitalia; 4, penis, other with side; 5, penis opened, showing sarcobelum; 6, rectum rectal caecum. 80 AGRIOLIMACIDAE exposed. It is situated underneath the intesti- nal caecum, not at the rear of the body. The is short and little sinuous. Deroceras johannae spec. nov. hermaphrodite duct (figs. 3-10) The spermoviduct and prostate are greyish-black for most of their lengths, becoming paler ante- Material.- riorly. The albumen gland and anterior genita- Moll. lia is Holotype and two paratypes in ZMA: are cream. The spermatheca pear-shaped, 385001 and 385002 respectively; two paratypes with a short, broad spermathecal duct. The in RMNH (no. ale. 9124). penis has a lower bulbous sack, which contains Type locality.- the sarcobelum. The apical part of the penis is Greece, Cyclades, Isle of Andros, 2 km W of large, kidney-shaped, consisting of two diverti- Korthion, along the road to Kochylou (= 17 km cula of about equal size. On top of one of them SSE of Andros), under stones; UTM LB1883; 23-IV- a bunch of six thin, crenulated appendages are 1984. present. The vas deferens enters the penis on the same diverticulum, somewhat lower. The sar- Diagnostic features.- cobelum is large, flat, with a semicircular A with well outline. the it is bound with large, dark-grey Deroceras a In holotype up, a Penis with furrow between the folds developed rectal caecum. apically deep, narrow two of which with tuft in it is somewhat two large diverticula, one a (fig. 5); a paratype (fig. 8) of crenulated the lower with in long, thin, appendages; irregular, only a superficial furrow; part of the penis contains a large, semicircu- another paratype it is folded like in the holo- lar which is folded its but the folds do sarcobelum, along long type, not lay so closely axis. together. Between both diverticula an unbranch- ed penial retractor muscle is inserted. The External appearance (fig. 9).- atrium is attached to the body wall by small All adults and between muscles. specimens are measure 26 and 33 mm. The hole-type is 26 mm long and about 4.5 mm broad. Its mantle length is 13 mm. Derivation of name.- The mantle and dorsum are unicolourous dark- D. johannae is named in honour of Mrs. J.E. her grey; the sides are gradually becoming lighter Butot-Okkersen, to acknowledge collecting towards the sole. Around the pneumostome a efforts together with her husband. She also lighter, slightly swollen border is present. collected this slug. Superficial furrows run across the dorsum and sides. The sole is cream coloured. An indis- Discussion.- tinct keel is present on the posterior end of Several unicolourous dark species of Deroce- the dorsum. There is little variation in exter- ras have been described or reported from Greece. nal appearance among the available specimens. D. oertzeni (Simroth, 1889) from Kowari Mountain (Oros Kouvara), Andros, seems to be smaller Shell (fig. 10).- (according to Simroth, 1889, fig. 3, about The shell of a of 31 mm measured 23 mm) and has a unicolourous grey sole. Fur- paratype , 6.4 x 4.0 mm. ther, it differs in having no or only a very small rectal caecum, longer, more slender diverticula with lateral Intestine (fig. 6).- penial as well as api- all examined distinct rectal cal and in branched In specimens a appendages, having a penial is which is twice muscle caecum present, about as long retractor (Simroth, 1889, fig. 11). D. as broad. thersites (Simroth, 1886) from Piraeus near Athens has a differently shaped penis and Genital system (fig. 4-5, 7-8).- penial appendage and is usually spotted on the The ovotestis consists of relatively small, dorsum and mantle (cf. Wiktor, 1983, figs. 96- dark-brown little or not at all 101) U. cf. sensu very "acini, . andrios Reischiitz, 1983b, 81 7-10. Deroceras anterior Figs. johannae n.sp., paratypes. 7, genitalia; 8, penis opened, showing shell. sarcobelum; 9, external appearance; 10, near Fig. 11. Deroceras keaensis Altena, Greece, Isle of Kea, Kea, paratype (RMNH no. ale. 9002), penis opened, showing sarcobelum. 82 five lobate and a from the Isle of Thasos has a differently shap- appendages very conspicuous short of the deferens. Sarco- ed penis and sarcobelum and only a very papilla at the entry vas 4-5). belum with blunt rectal caecum (Reischiitz, 1983b, figs. broad, flat, a apex. ikaria 1983 The same holds for D. Reischiitz, (Reischiitz, 1983a, figs. 1-5). D. berytensis External appearance (fig. 12).- (Bourguignat, 1852) from Beirut, Lebanon, has The holotype is 18 mm long; its mantle with small according to Wiktor & Mylonas (1981: 192) "an length is 7.5 mm. Animal light brown a oval penis without appendix". Simroth's (1889: dark spots on mantle and dorsum. There is on end 15) interpretation of this species refers to a conspicuous keel present the posterior species completely different from D. johannae. of the dorsum. Very superficial, hardly discern- sides. Sole Prof. A. Wiktor suggested (in litt.) that able furrows run across dorsum and either our specimens may belong to D. keaensis cream. samium Altena, 1973 or D. Rahle, 1983. Of both - species type material (in RMNH) could be stud- Shell. ied. D. keaensis from the Isle of Kea has Not examined. about the same size and external appearance, as well rectal and Intestine 16).- as a similar caecum pigmenta- (fig. caecum tion of prostate and spermoviduct. The penis, A clear rectal is lacking. however, has a different shape with a bunch of short Genital 12-15).- about ten smooth appendages apically on a system (figs.