Prostoma kolasai, Gibson & Moore, 1976

Kajihara, Hiroshi, 2025, A taxonomic revision of the freshwater monostiliferous hoplonemertean genus Prostoma Dugès, 1828 (Nemertea: Eumonostilifera): a radical solution or an over-lumping?, Zootaxa 5646 (4), pp. 451-500 : 468-469

13. kolasai Gibson & Moore, 1976

Source. In the binomen Prostoma kolasai by Gibson & Moore (1976: 204, figs 2, 3). Type locality. Konin Lakes , Konin, Poznań, Poland ( Fig. 9 ) .

Etymology. Masculine noun in the genitive singular; after Jerzy Kolasa, the original finder of the species. Remarks. Although the species has been regarded as a valid taxon by subsequent researchers ( Gibson 1995: 496;

Chernyshev et al. 1998: 61; Sundberg & Gibson 2008: 62), it is herein considered synonymous with P. clepsinoides .

For the overlooked presence of the frontal organ ( Fig. 6A–L ) in the original description, see Discussion.

Figures

FIGURE 6. Syntypes of Prostoma kolasai Gibson & Moore, 1976 (herein synonymized with P. clepsinoides Dugès, 1826), transverse sections showing frontal organ. A, Anterior end of one of the four specimens of NHML 1975.2.14.1. B–L, Another specimen of NHML 1975.2.14.1; arrowhead indicating rhynchostomodaeum.

FIGURE 9. World map showing distribution of 25 nominal species of freshwater monostiliferous hoplonemerteans indicated by boxes and respective species-group names (three subterranean species are indicated with ‘S’ in parentheses); circles, diamond, and triangles indicate localities of DNA-barcoded individuals; circles, Haplogroup 1 from the UK, Sweden (SE), Italy (IT), Macedonia (MK), Japan (JP), New Zealand (NZ), Mexico (MX), Indiana (IN), and Massachusetts (MA); diamond, Haplogroup 2 from Norway (NO); triangles, Haplogroup 3 from Sweden (SE) and California (CA).