Lindholmiola reischuetzi FALKNER, 1995

Subai, Peter & Neubert, Eike, 2014, Revision of the genus Lindholmiola HESSE, 1931 (Gastropoda: Pulmonata: Helicodontidae), Contributions to Natural History 23, pp. 1-94 : 76-82

Lindholmiola reischuetzi FALKNER, 1995

Figs 28 , 47–50 , 51

1907 Helix (Gonostoma) lens var. insularis O. BOETTGER , Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft, 39 (1): 34 [several times preoccupied].

1918 Caracollina lens insularis , – Hesse, Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft, 50: 109.

1960 Lindholmiola lens insularis , – Urbanski, Bulletin de l'Institut Zoologique de l'Académie Bulgare des Sciences, 9: 91. Taf. 4 Fig. 4 a–c, 5 a–c .

1983 Lindholmiola lens insularis , – Reischütz, Annalen des Naturhistorischen Museums in Wien, 85 (B): 135.

1988 Lindholmiola lens insularis , – Reischütz, Annalen des Naturhistorischen Museums in Wien, 90 (B): 347.

1995 Lindholmiola reischuetzi FALKNER , Heldia, 2 (3/4): 97 (nom. nov. pro Helix (Gonostoma) lens var. insularis O. BOETTGER, 1907 ).

Diagnosis: shell flat, lentiform, usually not haired, with a blunt keel, parietum with a very thick callus, vagina completely reduced,

Description of shell: shell flat, lentiform, basic colour light brown to yellowish-brown; initial 1–1½ of the teleoconch whorls smooth, then with a fine and dense radial sculpture, becoming stronger on the subsequent whorls, developing to small riblets; ventral side of the shell usually with fine radial stripes only, sometimes with small riblets; whole shell with a dense granulation; shell usually not haired, but if so, then restricted to a narrow stripe just above the blunt peripheral keel (hairs 0.5–0.8 mm, yellowish); shell with 5½–7 regularly increasing and flat whorls, with a blunt keel; shells tend to produce scalarid forms (see remarks); suture shallow; last whorl slightly ascending, but descending before the aperture with a white coloured area; umbilicus dish-like, perspective, diameter 1.7–3.3 mm; aperture very oblique, slightly curved in lateral view; in frontal view of semi-circle form, peristomial insertions with a gap of 2–3.1 mm, parietal callus a very thick, bar-like structure; peristome sharp, broadened apically and laterally, often slightly reflected basally.

Measurements (in mm): H: 3.1–4.7; D: 9.1–13.3; aH: 2.5–4.7(1.4–2.8); aW: 3.4–5.3.

Details of body (according to 6 animals from 4 km of Kehrókambos in direction of Stavroúpoli): head and dorsum dark brown to grey; sole cream with brownish lateral rims; mantle above the secondary ureter with one stripe of dark-brown pigmentation; secondary ureter opens 0.5–1 mm from the pneumostome.

Morphology of the genital organs ( Fig. 28 ): penis relatively short, slightly thickened, penial glandular tissue covers only 1/4 of total penis length, penial lumen with two large pilasters with one of them starting at the proximal penial wall and stretching to the penial pore, the second branching into two arms before reaching the proximal penial wall, several small, perpendicularly arranged accessory folds present; vagina completely reduced, glandula and bursa copulatrix branch off the atrium, glandula with a short stalk and a long and scarcely folded part; bursa copulatrix reaching the length of the glandula or somewhat shorter, vesicle almost not discernible; atrial lumen filled with a large, broad and flat, pillow-like pilaster, connecting to a few short folds.

Differential diagnosis: On average, L. spectabilis is larger than L. reischuetzi . Equally sized shells can always been identified as L. spectabilis by its larger aperture, the weak palatal callus, and the usually narrower umbilicus. The reduced vagina is a clear autapomorphic character that separates L. reischuetzi from all other species of Lindholmiola .

Around the Bay of Korinthos, there is a strongly keeled form of L. lens (callojuncta), which somewhat resembles L. reischuetzi . This form of L. lens , however, has a larger shell, and its palatal callus is only slightly reinforced. Other forms of L. lens have a more raised spire and always a weak palatal callus.

Type specimens: Greece, Thássos Island, UTM n. det., ex Speidel, ex coll. O. Boettger, syntypes insularis: SMF 7048/1 , 7049/1 , 101953/4 .

Additional specimens examined:

Greece, Makedonía, Halkidikí Peninsula, 500 m N of Eleohória , on low limestone rocks, 170 m alt., UTM FK 86 , 40 .3434°N 23.1613°E, leg. Subai 05.05.1995, S 15485 /16 ; Halkidikí Peninsula, in valley beside the cave of Petrálona , 360 m alt., UTM FK 87 , 40 .3759°N 23.1681°E, leg. Subai 05.05.1995, S 15486 /5 ; leg. Subai 29.5.1997, S 15487 /179 ; N N border of Galipsós , on limestone rocks, approx. 200 m alt., UTM GL 42 , 40 .8062°N 23.9502°E, leg. Subai 06.05.1995, S 15484 /13 + 10 (alk.) ; mountain slope N of Podohóri , on limestone rocks, 450 m alt., UTM KF 42 , 40 .8473°N 24.0249°E, leg. Subai 27.05.1997, S 15505 /25 ; Simvolo Mountains, 1.2 km from Sidirohóri direction Foliá (= W of Karavangélis), on limestone rocks, 250 m alt., UTM KF 52 , 40 .8380°N 24.1375°E, leg. Subai 27.05.1997, S 15510 /62 ; Kokkinohóri , UTM KF 52 , 40 .81°N 23.99°E, Neuteboom 11.7.1976, NNM/2 + 3 (juv.) + 16 (alk.) ; mountain slope 4.5 km W of the bifurcation to Loutrá Eleftheró (= 48 km W of Kavála on the street along the bank), on limestone rocks, 30 m alt., UTM KF 51 , 40 .7211°N 24.0601°E, leg. Fauer & Subai 21.09.1989, S 15492 /26 ; N border of Taxiárhis , under crystalline stones, 500 m alt., UTM KF 66 , 41 .2328°N 24.1888°E, leg. Subai 22.05.1997, S 15508 /36 + 4 (alk.) ; 11 km above Kalífitos , UTM KF 66 , 41 .25°N 24.29°E, leg. Fauer 31.7.1971, S 15497 /1 ; 2.6 km SW of Makriplágio , on limestone rocks, 520 m alt., UTM KF 66 , 41 .2082°N 24.2519°E, leg. Subai 08.05.1995, Maa /7, S 15491 /37 + 13 (alk.) ; above the ruins of Philippi near Krinídes , on limestone rocks, 85 m alt., UTM KF 74 , 41 .0128°N 24.2851°E, leg. Neuteboom 12.7.1976, NNM/23 + 4 (juv.) + 14 (alk.) ; leg. Maassen 7.1980, Maa /91 + 5 (juv) ; leg. Kiss & Pintér 7.7.1986, HNHM 29894 /18 + 3 (juv.) ; leg. Subai 7.5.1995, S 15496 /2 ; 5 km from Limnia direction Zigós , on low limestone rocks and under stones, 730 m alt., KF 74 , 41 .0589°N 24.3816°E, leg. Subai 26.05.1997, Maa /12, S 15499 /118 ; on marble rocks at N border of Ipsili Ráhi , approx. 500 m alt., UTM KF 76 , 41 .2123°N 24.3469°E, leg. Subai 23.05.1997, S 15507 /31 ; 1 km E of Nikifóros , UTM KF 76 , 41 .17°N 24.33°E, leg. Kiss & Pintér 5.7.1986, HNHM 29911 /104 + 55 (juv. + fragment) ; bridge 1.8 km E from Nikifóros , on limestone rocks, approx. 235 m alt., UTM KF 76 , 41 .1726°N 24.3345°E, leg. Subai 23.05.1997, S 15506 /10 ; in Makriplágio Village , beech forest and border of forest with stone walls, under stones and in leaf litter, crystalline rocks, 880 m alt., UTM KF 76 , 41 .2267°N 24.2713°E, leg. Subai 22.05.1997, S 15509 /4 ; 2 km E of Kavála , UTM KF 83 , 40 .95°N 24.45°E, leg. Maassen 7.1980, Maa /17 + 4 (juv) ; 2.5 km E of Kavála , hill slope with small limestone rocks, 20 m alt., UTM KF 83 , 40 .9486°N 24.4438°E, leg. Fauer & Subai 22.09.1989, S 15488 /9 ; 3 km W of Paleá Kavála , on limestone rocks above the river, 200 m alt., UTM KF 84 , 41 .0009°N 24.3934°E, leg. Subai 07.05.1995, S 15494 /74 ; 2.5 km from Paleá Kavála direction Korifés , on low limestone rocks and under stones, 500 m alt., UTM KF 84 , 41 .0170°N 24.4388°E, leg. Subai 07.05.1995, S 15493 /57 + 5 (alk.) ; S exposed slope 4.2 km from Paleá Kavála direction Halkeró, S exposed mountain slope, on limestone rocks, 440 m alt., UTM KF 84 , 40 .9994°N 24.4273°E, leg. Subai 26.05.1997, S 15502 /38 ; on limestone rocks at SE border of Likóstomo , 740 m alt., UTM KF 85 , 41 .1078°N 24.4424°E, leg. Subai 26.05.1997, S 15498 /14 ; 800 m W of Dipótamos , on limestone rocks beside highway, 690 m alt., UTM KF 95 , 41 .1196°N 24.5762°E, leg. Subai 26.05.1997, S 15503 /14 ; limestone mountain approx. 2.5 km NNE of Zarkadía (along the road), 450 m alt., UTM LF 04 , 41 .0288°N 24.6417°E, leg. Kiss & Pintér 7.7.1986, HNHM 29890 /153 + 39 (juv. + fragment) ; leg. Fauer & Subai 22.09.1989, Maa /9, S 15489 /179 ; leg. Subai 7.5.1995, S 15490 /24 ; valley 2.5 km E of Makrihóri (= direction Kehrókambos ), beside village ruins, on limestone rocks, 180 m alt., UTM LF 04 , 41 .0466°N 24.6462°E, leg. Subai 26.05.1997, S 15500 /24 ; stone hedge in valley of two mountains 1 km from Ágios Kosmás direction Makrihóri , 380 m alt., UTM LF 04 , 41 .0783°N 24.6536°E, leg. Subai 26.05.1997, S 15501 /9 ; 4 km from Kehrókambos direction Stavroúpoli , on low limestone rocks, approx., 180 m alt., UTM LF 06 , 41 .1806°N 24.6687°E, leg. Subai 07.05.1995, S 15495 /47 + 7 (alk.) ; limestone mountain W of Stavroúpoli (= opposite bank of Néstos river ), in forest, on limestone rocks, 120 m alt., UTM LF 06 , 41 .2031°N 24.7057°E, leg. Subai 27.07.1990, S 15482 /3 ; leg. Subai 24.5.1997, S 15483 /24 + 1 (juv.) ; Parádissos Village , UTM LF 15 , 41 .08°N 24.76°E, leg. Kiss & Pintér 7.7.1986, HNHM 29896 /19 + 2 (juv.) ; leg. Maassen 7.1980, Maa /45 + 3 (juv) ; NE border of Parádissos , on limestone rocks, 60 m alt., UTM LF 15 , 41 .0843°N 24.7612°E, leg. Subai 25.05.1997, S 15504 /9 + 2 (juv.) + 1 (alk.). — Thráki, 2 km N of Xánthi (= direction to Stavroúpoli ), on limestone rocksW of the highway, 140 m alt., UTM LF 25 , 41 .1591°N 24.8806°E, leg. Subai 27.07.1990, S 15481 /2. — Thássopoula Island , UTM LF 02 , 40 .82°N 24.70°E, leg. Valkoura, 1842, SMF 158896 /5. — Thássos Island, olive grove at S border of Alikí , under flat stones, UTM LE 09 , 40 .6050°N 24.7416°E, leg. Fauer & Subai 21.09.1989, S 15477 /10 ; 1 km W of Alikí , UTM LE 09 , 40 .60°N 24.72°E, leg. Kiss & Pintér 6.7.1986, HNHM 29915 /1 ; 15 km from Kalívia direction Alikí , on limestone rocks, 110 m alt., UTM LE 09 , 40 .5914°N 24.6683°E, leg. Fauer & Subai 21.09.1989, S 15478 /4 ; Theológos , UTM LF 00, 40.66°N 24.69°E, leg. Kiss & Pintér 6.7.1986, HNHM 29903 /12 + 14 (juv.) ; on limestone rocks above cemetery of Theológos , 300 m alt., UTM LF 00, 40.6634°N 24.7022°E, leg. Fauer & Subai 21.09.1989, S 15479 /37 ; narrow (partim) of a valley 2.8 km NE of Theológos , on marble rocks, 530 m alt., UTM LF 00, 40.6696°N 24.7329°E, leg. Subai 25.07.1990, S 15480 /29 ; W of Thássos Town , UTM LF 01 , 40 .77°N 24.68°E, leg. Kiss & Pintér 6.7.1986, HNHM 29919 /1.

Remarks: Shell size variations in L. reischuetzi are few. However, next to the widespread typical form of this species, there are two local forms that need to be mentioned: 1) the populations east and northeast of Dráma to the Lekánis Mountains (for example in Makriplágio, Taxiárhis, Ipsilí Ráhi, Nikifóros etc.) tend to build scalarid shells. The whorls of this form are stepped, and often the ventral side of the shells is covered by riblets; 2) the easternmost populations of L. reischuetzi (for example close to Stavroúpoli and N of Xánthi) have flat shells with rapidly increasing whorls. It has to be stressed that these character states are restricted to those populations mentioned. However, on the Island Thássos these forms can be found mixed with the widespread form with all intergrades. For this reason, these local forms cannot be separated as geographical subspecies.

Distribution ( Fig 51 ): This species is recorded from north-eastern Greece from Makedonía to western Thráki, in the coastal stripe between the Dráma to Xánthi and the sea. It also lives on the islands of Thássos and Thássopoula, and there is a small isolated population in the Southwest of the Halkidikí Peninsula.

Figures

Figs 26–28. Genital organs of Lindholmiola species. Fig. 26: Lindholmiola pirinensis, a: situs, b: lumina of genital organs, Greece, Makedonía, Falakró Mts., 3 Km from the crossing Vólakas in direction to Skiing centre; Fig. 27: Lindholmiola corcyrensis, a: situs, Greece, Island Kefaloniá, 1.5 Km E of Sámi, b: lumina of genital organs, Greece, Island Lefkáda, 25 Km S von Lefkáda village; Fig. 28: Lindholmiola reischuetzi, a: situs, b: lumina of genital organs, Greece, Makedonía, 4 Km of Kehrókambos in direction to Stavroúpoli.

Figs 47–50. Lindholmiola reischuetzi. Fig. 47: syntype Helix (Gonostoma) lens var. insularis, SMF 7048/1, Greece, Island Thássos, D = 9.4 mm; Fig. 48: NMBE 515640, Greece, Makedonía, Halkidikí Peninsula, close to the cave of Petrálona, D = 10.13 mm; Fig. 49: NMBE 515639, Greece, Thráki, Canyon 2 Km N of Xánthi (form with large umbilicus and broad whorls), D = 12.43 mm; Fig. 50: NMBE 515641, Greece, Makedonía, N boundary of Taxiárhis (scalarid form), D = 12.01 mm. — All photos Neubert/Bochud, × 3.

Fig. 51. Distribution of Lindholmiola reischuetzi.

Figs 3–6. Lindholmiola lens. Fig. 3: syntype Helix lentiformis, ZMZ 508656, "Thessalie et Attique", D = 11.2 mm; Fig. 4: NMBE 515542, Attika, Methana, 500 m before village, 12.07.1996, leg. E. Neubert, D = 12.77 mm; Fig. 5: syntype Helix lens var. callojuncta, NHMG 372, D = 12.0 mm; Fig. 6: syntype Helix lens var. elia, SMF 101961, Kumani, Elis, coll. Jetschin ex Boettger, 1883, D = 11.94 mm. — All photos Neubert/Bochud, × 3.