Lindholmiola pirinensis JAECKEL 1954

Lindholmiola pirinensis JAECKEL, 1954 Figs 26, 36–38, 39

1954 Lindholmiola contorta pirinensis JAECKEL, Mitteilungen aus dem Zoologischen Museum in Berlin, 30 (1): 86, Abb. 22.

1957 Lindholmiola corcyrensis pirinensis, – Jaeckel, Klemm & Meise, Abhandlungen und Berichte aus dem Staatlichen Museum für Tierkunde in Dresden, 23 (2): 188.

1962 Lindholmiola corcyrensis pirinensis, – Klemm, Sitzungsberichte der Österreichischen Akademie der Wissenschaften, Mathematisch-Naturwissenschaftliche Klasse, Abt. I, 171 (6/7): 253.

1968 Lindholmiola corcyrensis, – L. Pintér, Malakologische Abhandlungen aus dem Staatlichen Museum für Tierkunde Dresden, 2 (15): 226, Abb. 4, Abb. 32–34 [non corcyrensis ROSSMäSSLER].

1973 Lindholmiola (Lindholmiola) corcyrensis pirinensis, – Hudec & Vašátko, Acta scientiarum naturalium Academiae Scientiarum Bohemoslovacae, 7 (9): 13, Abb. 10 right side Taf. 3 Fig. 1.

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

Diagnosis: shell depressed, usually no granulation, whorls with a blunt shoulder, distal penial lumen with two equally sized strong pilasters.

Description of shell: shell depressed, with a slightly raised spire, basic colour light to chestnut brown; initial half of the protoconch whorl smooth, then with a very fine and dense radial sculpture; teleoconch surface with strong radial riblets, becoming very weak on the penultimate and ultimate whorl, a granulation usually lacking; yellowish hairs usually eroded (length 0.47–1.4 mm, shorter in the umbilicus), but if present covering the whole shell except a small, hair-free zone around the shells periphery, where only randomly some small hair knuckles can be found; shell with 5¼–6¾ regularly increasing and well rounded whorls, with a blunt shoulder, last whorl descending shortly before the aperture; suture of medium depth; umbilicus almost cylindrical at its beginning, suddenly increasing in size in the last whorl, diameter 1.55–2.8 mm; aperture oblique, slightly curved in lateral view; in frontal view obliquely oval, peristomial insertions with a gap of 2.65–5.9 mm; parietal callus very thin, often missing; peristome sharp, strongly broadened laterally, slightly reflected basally; oblique columellar reflection, but only covering ca 1/10 of its diameter.

Measurements: H: 4.7–7.5; D: 9.2–16.4; aH: 4.2–7.5(2.65–5); aW: 4.5–8.

Details of body (according to 10 specimens (3 km from the crossing Vólakas/6; 3.2 km N of Makriplágio/4; Hudec & Vašátko, 1973: 13, Abb. 10): head and neck greyish to brown-greyish, flanks and tail cream; sole cream with darker rims; mantle rim with a 1 mm broad stripe without pigmentation, rest of mantle for 1½ whorl with a pattern of large grey to brown spots, subsuturally with a broad brown stripe; secondary ureter opens 1 mm before pneumostome, split into two 1 to 1.5 mm long canals.

Morphology of the genital organs (Fig. 26): penis relatively long, slightly to well thickened, penial glandular tissue covers ca 1/3 of the total penis length, distal penial lumen with two equally sized strong pilasters, one of them with proximal warts and a rounded, thickened distal end, the other pilaster is in parallel, but recurving and leading back to unite with the warty end of the first pilaster; vagina short to relatively long, lumen filled with a long and thick pilaster which splits distally into two branches (sometimes with additional parallel folds); glandula with a long stalk and a strongly folded part, bursa copulatrix as long as or sometimes longer than the glandula, pedunculus constituting ca half of the total length of the bursa copulatrix, vesicle of bursa copulatrix not observably differentiated; atrial lumen with a large serrated area, and with a central pilaster that connects to the vaginal pilaster.

Differential diagnosis: In its general habit, L. pirinensis is quite close to L. corcyrensis, but it differs from this species by its well rounded whorls and the deeper suture. In L. corcyrensis, the teleoconch surface sculpture is coarser, with stronger irregular radial stripes. The hairs are usually permanent in L. pirinensis, but on average shorter. The descending part of the last whorl is bright to almost whitish, and the apertural rim usually more strongly reinforced with a small columellar shield. The penial pilasters are v-shaped wrinkles but longitudinal pilasters in L. pirinensis.

On average, shells of L. girva are smaller than those of L. pirinensis, with the first species having a coarser teleoconch surface sculpture, with stronger irregular radial stripes. The hairs in L. pirinensis are usually permanent but shorter than those of L. girva. In L. pirinensis, the descending part of the last whorl is bright to almost whitish, and the apertural rim usually more strongly reinforced. In L. girva, the penial pilasters never recurve like in L. pirinensis.

Type specimens: Bulgaria, Pirin Mountains, Banderica Valley, 1800–2000 m alt., UTM GM 02, 41.76°N 23.41°E, leg. Rensch, holotype pirinensis: ZMB 101257, paratype pirinensis: ZMB 101258/5 + 2 (juv.); ex Knipper, ex coll. Jaeckel, paratype pirinensis: SMF 153359/2.

Additional specimens examined:

Fyrom, Katlanovo, UTM EM 53, 41.89°N 21.68°E, leg. Kiss & Pintér 4.7.1985, HNHM 30857 /1 (+ 5 girva).

Bulgaria, Kostinbrod near Sofija, UTM FN 84, 42.81°N 23.22°E, leg. Mészáros 9.1981, HNHM 13871 /1 (+ 1 juv. girva); [Gara] Lakatnik, UTM FN 97, 43.08°N 23.38°E, leg. Pintér 13.7.1967, HNHM 33699 /38 + 2 (juv.); leg. Erőss 24.8.1976, S, 18264/1; between Belogradčik and Orešec, UTM FP 33, 43.65°N 22.70°E, leg. Kiss & Pintér, 18.7.1984, HNHM 37470 /1; Pirin Mountains, Banderica Valley, near Banderica hut, UTM GM 02, 41.78°N 23.44°E, leg. Clauss, Maa /2; leg. Pintér 14.7.1974, HNHM 49535 /1; Plovdiv (= Philippopel), hill "Schachti Tepe", UTM n. det., leg. Matscheva, SMF 284839 /3; surroundings of Bačkovski monastery, UTM LG 24, 41.9426°N 24.8491°E, leg. Pintér 22.7.1967, S 3839/3; leg. Pintér 10.7.1973, HNHM 49546 /1 + 3 (juv.); leg. Pintér 13.8.1981, HNHM 33696 /3; 2 km NW of Malko Tarnovo (= bifurcation to Stoilovo), UTM NG 44, 42.0071°N 27.5044°E, leg. Erőss 29.7.1997, coll. Erőss /3; Ropotamo River right bank, UTM NG 67, 42.32°N 27.74°E, leg. Szigethy 4.7.1973, HNHM 49530 /1; Zdravec im Rodopi Mountains, UTM n. det., leg. Uminski, 19.9.1957, HNHM 40344 /1.

Greece, Thráki, 1 km W of Neohóri, UTM LF 06, 41.22°N 24.60°E, leg. Kiss & Pintér 5.7.1986, HNHM 29883 /1 (juv.); 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 15515 /2; 2.1 km from the highway Xánthi–Stavroúpoli direction Ehīnos, on marble rocks, 220 m alt., UTM LF 26, 41.2085°N 24.8612°E, leg. Subai 24.05.1997, S 15518 /4; forest border 700 m from Melivoia Village direction Kotili, crystalline rocks, 415 m alt., UTM LF 27, 41.3328°N 24.9218°E, leg. Subai 24.05.1997, S 15516 /3; forest border 1.8 km from Melivoia Village direction Kotili, in leaf litter, crystalline rocks, 450 m alt., UTM LF 27, 41.3354°N 24.9063°E, leg. Subai 24.05.1997, S 15517 /6; 6.3 km from Amaxádes direction Íasmos (= 1 km from Kopteró direction Íasmos), on limestone rocks approx. 100–150 m N of the highway, 60 m alt., UTM LF 45, 41.1204°N 25.1406°E, leg. Subai 27.07.1990, S 15638 /1; 2.6 km from Mákri direction Komotiní (on the old highway), mountain with cave beside new highway, on limestone rocks, 100 m alt., UTM LF 92, 40.8758°N 25.7095°E, leg. Subai 26.07.1990, S 15635 /2; gorge at NW border of Avas (= 13 km N of Alexandroúpoli), on limestone rocks, 100 m alt., UTM MF 02, 40.9366°N 25.9129°E, leg. Subai 26.07.1990, S 15636 /2. — Makedonía, 2.9 km from Ahladia direction Káto Nevrokópi, no lime stone, 690 m alt., UTM GL 48, 41.3885°N 23.9748°E, leg. Subai 22.05.1997, S 15525 /21 + 1 (alk.); Falakró Mountains, 3 km from the bifurcation Vólakas direction skiing center, deciduous forest with limestone rocks, 1200 m alt., UTM KF 57, 41.2952°N 24.0091°E, leg. Subai 08.05.1995, S 15514 /8 + 6 (alk.); upper border of gorge 1 km from Mikroklissoúra direction Potami, on limestone rocks, 400 m alt., UTM KF 58, 41.3867°N 24.0698°E, leg. Subai 22.05.1997, S 15526 /9 + 3 (juv.); oak forest 12.9 km from Sidirónero direction Livaderó, in leaf litter, crystalline rocks, 600 m alt., UTM KF 67, 41.2740°N 24.2088°E, leg. Subai 22.05.1997, S 15524 /2 + 1 (juv.) + 1 (alk.); mountain slope at NE border of Sidirónero, river valley, among herbs and under stones, 650 m alt., UTM KF 68, 41.3686°N 24.2339°E, leg. Subai 22.05.1997, S 15522 /3; beech forest 3.2 km N of Makriplágio (along the highway), under stones, in leaf litter, crystalline rocks, 900 m alt., UTM KF 76, 41.2350°N 24.2945°E, leg. Subai 8.5.1995, S 15513 /8 + 2 (alk.); leg. Subai 22.5.1997, S 15523 /6 + 4 (alk.); on low marble rocks at Disvato Village, under stones and in leaf litter, 450 m alt., UTM KF 95, 41.0681°N 24.5713°E, leg. Subai 26.05.1997, S 15521 /2; mountain E of Makrihóri, beside a marble quarry, 650 m alt., UTM LF 04, 41.0692°N 24.6298°E, leg. Subai 07.05.1995, S 15511 /1; small river gorge 4.1 km from Kehrókambos direction Makrihóri, stone hedge, under stones, 485 m alt., UTM LF 05, 41.1292°N 24.6448°E, leg. Subai 26.05.1997, S 15520 /2; in forest at W border of Stavroúpoli, Nestos river W bank, on limestone rocks, 120 m alt., UTM LF 06, 41.2031°N 24.7056°E, leg. Subai 7.5.1995, S 15512 /11; leg. Subai 24.5.1997, S 15519 /5 + 1 (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 15634 /1.

Remarks: Specimens from more humid forested areas tend to have larger shells with a higher spire than those from more arid habitats, where the shells tend to be flatter and have a larger umbilicus. Next to populations with a wide range in shell size, there are also populations which contain excusively large specimens. However, these are considered conspecific, because they comply with all other character states of the other populations.

Distribution (Fig. 39): Lindholmiola pirinensis is well known from the mountains in western and southern Bulgaria and in the northern part of Greece north to the area between Kavála–Dráma and in Thracia. The westernmost record is from Fyrom in the Vardar valley close to Katlanovo