Cochlostoma (Clessiniella) tergestinum ( Westerlund, 1878 )

Zallot, Enrico, Mattia, Willy De, Fehér, Zoltán & Gittenberger, Edmund, 2021, Cochlostoma revised: the subgenus Clessiniella Zallot et al., 2015 (Caenogastropoda, Cochlostomatidae), European Journal of Taxonomy 762 (1), pp. 49-95: 82-87

publication ID

https://doi.org/10.5852/ejt.2021.762.1453

publication LSID

lsid:zoobank.org:pub:D1093CEB-7EBB-44A0-8078-8DC616B857F5

DOI

http://doi.org/10.5281/zenodo.5188573

persistent identifier

http://treatment.plazi.org/id/038B8791-316C-FFFD-7BF8-116BF3D126E0

treatment provided by

Felipe

scientific name

Cochlostoma (Clessiniella) tergestinum ( Westerlund, 1878 )
status

 

Cochlostoma (Clessiniella) tergestinum ( Westerlund, 1878)  

Figs 1 View Fig , 3B View Fig , 5 View Fig , 14C View Fig , 15C View Fig , 16C View Fig , 28–30 View Fig View Fig View Fig , 34 View Fig (bottom), 35 (bottom), 36 (top)

Pomatias tergestinus Westerlund, 1878: 108–109   (“Triest”).

Pomatias tortivus Westerlund, 1885: 124   (“Fiume, San Daniel u. Karstgebirge”, which should be Rijeka in Croatia and Štanjel in Slovenia).

Pomatias tergestinus var. grahovana A.J. Wagner, 1897: 616   , pl. 9 fig. 89 (“Grahovo bei Fiume”, a locality ca 10 km north of Rijeka in Croatia).

Pomatias tergestinus var. tortiva   – A.J. Wagner 1897: 616, pl. 9 fig. 88.

Cochlostoma tergestinum   − Welter-Schultes 2012: 102.

Diagnosis

Shell very variable, lip curved backwards more or less abruptly at the columellar side. Strong ribs on the teleoconch, in most of the populations widely spaced and, on the upper whorls, whitish and contrasting with the corneous, dark brown to light yellow, shell background. Visceral oviduct with convoluted loops path; body spermiduct straight.

Type material

Syntypes ITALY • “Triest” [ Friuli Venezia Giulia, Trieste ]; Westerlund leg.; SMF160677/1   same label data as for preceding; SMF 160676/7 ( Fig. 30 View Fig )   .

Other material

AUSTRIA • Dobratsch ; 46.59222° N, 13.6825° E; 2009; Mildner and Giovannelli leg.; EZ0799 GoogleMaps   Kranzwand ; 46.588799° N, 13.75002° E; Jul. 2015; AL leg.; NHMW109000 View Materials GoogleMaps   .

CROATIA • Sveta Nedelja near Labin; 45.13741° N, 14.14488° E; 2000; De Mattia leg.; WdM6961 GoogleMaps   Brest , Cicaria; 45.45444° N, 14.00625° E; Apr. 2008; De Mattia leg.; WdM6715 GoogleMaps   Drivenik spring; 45.24147° N, 14.64828° E; Mar. 2009; De Mattia leg.; WdM6714 GoogleMaps   from A6 to 501 down Bakar; 45.30543° N, 14.58579° E; Jul. 2009; De Mattia and Zallot leg.; EZ0938 GoogleMaps   Jakačici ; 45.179494° N, 14.004384° E; 2009; De Mattia leg.; WdM6699 GoogleMaps   Kremenje-Buje ; 45.43558° N, 13.68499° E; Jan. 2008; De Mattia leg.; WdM6400 GoogleMaps   Kukurini ; 45.19369° N, 14.07216° E; Feb. 2009; De Mattia leg.; WdM6698 GoogleMaps   Limski Kanal ; 45.12957° N, 13.74039° E; 2010; De Mattia leg.; WdM6693 GoogleMaps   Limski Kanal ; 45.12957° N, 13.74039° E; Jun. 2010; De Mattia leg.; WdM6998 GoogleMaps   Mala Ucka ; 45.27605° N, 14.19715° E; 2009; De Mattia leg.; WdM6768 GoogleMaps   Meja , Bakarac; 45.3037° N, 14.58348° E; 2009; De Mattia leg.; WdM6951 GoogleMaps   Momjan ; 45.442° N, 13.71384° E; 2009; De Mattia leg.; WdM6854 GoogleMaps   Mt Učka , beech forest ; 45.30636° N, 14.20865° E; 2009; De Mattia leg.; WdM6794 GoogleMaps   Mt Učka , top; 45.28967° N, 14.20341° E; 2009; De Mattia leg.; WdM6794 GoogleMaps   Pazin ; 45.24134° N, 13.93099° E; Jun. 1986; Drimmer leg.; HNHM97227 GoogleMaps   Permani ; 45.43742° N, 14.28905° E; 2009; De Mattia leg.; WdM6708 GoogleMaps   Raša ; 45.0872° N, 14.08854° E; 2010; De Mattia leg.; WdM6968 GoogleMaps   Rasko Polje ; 45.15638° N, 14.0538° E; 2010; De Mattia leg. GoogleMaps   EZ0813   Rasko Polje ; 45.15638° N, 14.0538° E; 1900; De Mattia leg.; EZ1027 GoogleMaps   Zminj ; 45.13991° N, 13.88873° E; 2000; De Mattia leg.; WdM6700 GoogleMaps   .

ITALY • Val Rosandra ; 45.62° N, 13.87139° E; 2000; Zallot leg.; EZ0840 GoogleMaps   Torri di Monrupino ; 45.71878° N, 13.80594° E; 1998; Zallot leg.; EZ0839 GoogleMaps   .

SLOVENIA • Abram-Nanos Mt ; 45.82055° N, 14.01433° E; 2008; De Mattia leg.; WdM6731 GoogleMaps   Brestovica pri Komnu ; 45.80996° N, 13.65016° E; 2009; De Mattia leg.; WdM6948 GoogleMaps   Čepno ; 45.67071° N, 14.09732° E; Jun. 2009; De Mattia leg.; WdM6866 GoogleMaps   Črnotiče-Črni Kal ; 45.55276° N, 13.88633° E; Mar. 2009; De Mattia leg.; EZ1028 GoogleMaps   Dolina Nanos-Abran-Podkraj ; 45.79813° N, 14.06699° E; Apr. 2009; De Mattia leg.; WdM6733 GoogleMaps   Farjev Vrh ; 45.92429° N, 13.95442° E; 2009; De Mattia leg.; WdM6740 GoogleMaps   Golac, Vela Vrata ; 45.51315° N, 14.02969° E; 2009; De Mattia leg.; WdM6762 GoogleMaps   Gorjansko ; 45.78485° N, 13.70068° E; 2000; De Mattia leg.; WdM6950 GoogleMaps   Hruščica ; 45.85832° N, 14.1117° E; 2000; De Mattia leg.; WdM2409 GoogleMaps   Ilirska Bistrika ; 45.56944° N, 14.23917° E; 2009; Zallot leg.; EZ0821 GoogleMaps   Kovk ; 45.94614° N, 13.95058° E; 2015 GoogleMaps   De Mattia leg.; WdM6737   Križna Jama ; 45.82003° N, 14.24579° E; Jun. 2009; Jochum leg.; HNHM97142 GoogleMaps   Markovščina-Dimnice cave ; 45.58357° N, 14.03994° E; 2009; De Mattia leg.; WdM6765 GoogleMaps   Mt Kobilica ; 46.06528° N, 13.80907° E; 2005; De Mattia leg.; WdM6849 GoogleMaps   Mt Nanos, top, loc. Plesa ; 45.79813° N, 14.06699° E; Jun. 2005; De Mattia leg.; WdM0000 GoogleMaps   Mt Snežnik 1161; 45.56816° N, 14.37049° E; Jun. 2010; De Mattia leg.; WdM7012 GoogleMaps   Mt Snežnik 1390; 45.57179° N, 14.41044° E; Jun. 2010; De Mattia leg.; EZ0965 GoogleMaps   Mt Snežnik 1447; 45.57877° N, 14.43839° E; Jun. 2010; De Mattia leg.; EZ0964 GoogleMaps   Mt Snežnik 1450; 45.58195° N, 14.43129° E; Jun. 2010; De Mattia leg.; EZ0962 GoogleMaps   Mt Snežnik car parking ; 45.58235° N, 14.43117° E; Jun. 2002; De Mattia leg.; WdM7006 GoogleMaps   Mt Vremščica ; 45.69898° N, 14.03388° E; 2009; De Mattia leg.; WdM6758 GoogleMaps   near Gorenje; 45.82976° N, 14.10755° E; 2009; Zallot leg.; EZ0817 GoogleMaps   near Logatec; 45.88076° N, 14.27448° E; 2009; Zallot leg.; EZ0828 GoogleMaps   Osp , 45.57071° N, 13.86168° E; 2010; De Mattia leg.; WdM6756 GoogleMaps   Ospo , small cliff ; 45.57119° N, 13.8582° E; May 2010; De Mattia leg.; WdM6993 GoogleMaps   Otlica ; 45.92822° N, 13.90918° E; 1986; De Mattia leg.; WdM6752 GoogleMaps   Planina ; 45.82405° N, 14.24708° E; 2000; Zallot leg.; EZ0823 GoogleMaps   Planina ; 45.82972° N, 14.25056° E; 2000; Zallot leg.; EZ0824 GoogleMaps   Planina , Postojna; 45.83° N, 14.26056° E; 2009; Zallot leg.; EZ0826 GoogleMaps   Podgorje ; 45.53872° N, 13.9449° E; 2000; De Mattia leg.; WdM6735 GoogleMaps   Podgorje ; 45.5364° N, 13.9463° E; 2009; De Mattia leg.; WdM6735 GoogleMaps   Podlešče-Bainsizza ; 46.05738° N, 13.72709° E; May 2009; De Mattia leg.; WdM6814 GoogleMaps   Prešnica ; 45.56587° N, 13.94191° E; Mar 2009; De Mattia leg.; WdM6734 GoogleMaps   Pri Cerkvi- Bainsizza ; 46.04133° N, 13.77584° E; 2009; De Mattia leg.; WdM6834 GoogleMaps   Rakow Skocjan; 45.79467° N, 14.28948° E; 2010; Zallot leg.; EZ0838 GoogleMaps   San Canzian (Škocjan); 45.66532° N, 13.99356° E; 2009; De Mattia leg.; WdM6754 GoogleMaps   Senožeče ; 45.71421° N, 14.07856° E; 2009; De Mattia leg.; WdM6865 GoogleMaps   10 km S of Vrhnika; 45.88549° N, 14.26091° E; 2000; Zallot leg.; EZ0827 GoogleMaps   Vrhnika, Močilnik ; 45.95591° N, 14.29268° E; 2009; Zallot leg.; EZ0829 GoogleMaps   .

Remarks

The original indication of the type locality is rather vague, since only a city in the Friuli-Venezia Giulia region, in the easternmost part of Italy is indicated. The closest to Trieste where we found the species is at “Val Rosandra”, 8 km north-east of the city. The fresh specimens collected there have shell features similar to those of the syntypes. We therefore consider them as topotypical.

Description

SHELL. The size of the shells is extremely variable (height 6.1–9.6 mm in the females) as well as their general morphology (see Fig. 28 View Fig ). Several populations are spotless whereas others have clear spots on the teleoconch. Depending on the population, the lip can be either poorly or even hugely developed. In lateral view, the body whorl, while approaching the aperture, may widen in various ways, depending on the population ( Fig. 4A View Fig : FF, AF, II). The H/W ratio is very variable and the slenderness of the shells in different populations varies accordingly.

FEMALE GENITALIA. There is a long, club-shaped seminal receptacle. In some cases there is a change of colour at its base, presumably indicating the starting point of the rather long distal oviduct. As shown in Table 5 View Table 5 , there is a considerable variability in the part of the seminal receptacle that is curved down and in the number of loops.

MALE GENITALIA. The inflated penis is longer than the body. The penial spermiduct is confined to the central part of the penis and gently twisted. The body spermiduct is straight and well defined.

Distribution

This species inhabits the eastern side of the province of Trieste in Italy, the southwestern part of Slovenia and the Istrian peninsula. It has also been found in several Croatian localities in the surroundings of Bakar and, quite far from its main range, on the Villacher Alps, in Austria (see Mildner 1997). The species has been erroneously reported for Albania (see Fehér & Erőss 2009).

Habitat preference

It is an obligate rock-dwelling species. Co. (Cl.) tergestinum   is found in a variety of habitats, from open, exposed limestone cliffs to shady spots in deciduous and evergreen forests.

Remarks

According to Zilch (1958) and Alzona (1971) there are 3 subspecies of Co. (Cl.) tergestinum   , viz. the nominate subspecies Co. (Clessiniella) tergestinum tergestinum ( Westerlund, 1878)   , Co. (Clessiniella) tergestinum grahovanum (A.J. Wagner, 1897)   and Co. (Clessiniella) tergestinum tortivum ( Westerlund, 1885)   .

For the time being, we here synonymize these nominal taxa because the conchological features which supposedly characterize them, like measures, density and prominence of the ribs, and the structure of the lip, are population features without an obvious geographical pattern. There is no significant correlation between latitude and longitude of the locality of the sample and the character states that are mentioned in the original description of the so-called subspecies. Moreover, in the surroundings of Trieste, the type locality of the nominate subspecies, only populations with some ‘ tortivum ’ shell features, like the thin lip, can be found ( De Mattia & Prodan 2006).

Some of the populations have a peculiar shell morphology (see for instance Fig. 28E–F View Fig ); their taxonomical status should be investigated more thoroughly especially since the available molecular H3 analysis indicates that population “EZ0813” from Rasko Polje, corresponding to the specimen in Fig. 28E View Fig , stands apart from the others.

Kingdom

Animalia

Phylum

Mollusca

Class

Gastropoda

Order

Architaenioglossa

Family

Cochlostomatidae

Genus

Cochlostoma

Loc

Cochlostoma (Clessiniella) tergestinum ( Westerlund, 1878 )

Zallot, Enrico, Mattia, Willy De, Fehér, Zoltán & Gittenberger, Edmund 2021
2021
Loc

Cochlostoma tergestinum

Welter-Schultes F. W. 2012: 102
2012
Loc

Pomatias tergestinus var. grahovana A.J. Wagner, 1897: 616

Wagner A. J. 1897: 616
1897
Loc

Pomatias tergestinus var. tortiva

Wagner A. J. 1897: 616
1897
Loc

Pomatias tortivus

Westerlund C. A. 1885: 124
1885
Loc

Pomatias tergestinus

Westerlund C. A. 1878: 109
1878