Travunijana vruljakensis Grego & Gloeer , 2019

Falniowski, Andrzej, Lewarne, Brian, Rysiewska, Aleksandra, Osikowski, Artur & Hofman, Sebastian, 2021, Crenobiont, stygophile and stygobiont molluscs in the hydrographic area of the Trebisnjica River Basin, ZooKeys 1047, pp. 61-89 : 61

Travunijana vruljakensis Grego & Gloeer, 2019

Fig. 9

GenBank no.

COI: MW879256-MW879272; H3: MW865737-MW865748

Remarks.

Grego and Glöer (2019) described a new monotypic genus Travunijana from Vrelo "Goricki Studenac" (Gorica), a spring at the right bank of the Trebišnjica River, this being its type locality. They found it also in two other springs: Vrelo Vruljak 1 (Gorica; our locality 12), and Vrelo Vruljak 3 (Gorica). Their diagnosis of the genus was based on a single “unique” character - the strange morphology of the penis - which was based on artefactual appearance, caused by fixation: a nonglandular outgrowth on the left side, located distally ( Grego and Glöer 2019). The penis photographed by them presents a bulbous, drastically contracted distal section, making copulation impossible.

Our molecular data (Fig. 8 ) confirmed the distinctiveness of the genus Travunijana Grego & Glöer, 2019. The phylograms based on H3, as well as on both concatenated loci placed Travunijana as the sister species with Graecoarganiella Falniowski & Szarowska, 2011, and Sarajana Radoman, 1975 (bootstrap 85%). The shell habitus is different (conic in Travunijana , ovate-conic in Sarajana ), and the penial morphology differs ( Hofman et al. 2019): the outgrowth on the left side is simple and filamentous in Sarajana , and short and bi-lobed in Travunijana . The phylogram based on COI showed a more complicated pattern, but bootstrap supports were too low for any more certain placement in the phylogeny.

Figures

Figure 8. Phylogenetic relationships of Travunijana and Iglicopsis based on COI, H 3 and concatenated loci; bootstrap supports given if over 60 %, their values together with Bayesian probabilities.

Figure 9. Shells: A-L Travunijana vruljakensis M-P Iglicopsis butoti M holotype N 2 F 61 O 2 F 68 P 2 F 69 (extraction numbers, see Table 3). Scale bars: 1 mm.