Dina crnogorensis Grosser & Pešić, 2022

Grosser, Clemens & Pešić, Vladimir, 2022, Dina crnogorensis sp. nov. (Annelida, Hirudinea: Erpobdellidae) - a new leech species from Montenegro, Ecologica Montenegrina 54, pp. 1-11 : 6-10

publication ID

https://doi.org/10.37828/em.2022.54.1

publication LSID

urn:lsid:zoobank.org:pub:9114177F-6C0F-43FE-80EA-DC9B0988FAEA

persistent identifier

https://treatment.plazi.org/id/ABD1010C-D3D2-40FE-A25B-CAEA27B8A889

taxon LSID

lsid:zoobank.org:act:ABD1010C-D3D2-40FE-A25B-CAEA27B8A889

treatment provided by

Felipe

scientific name

Dina crnogorensis Grosser & Pešić
status

sp. nov.

Dina crnogorensis Grosser & Pešić sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:ABD1010C-D3D2-40FE-A25B-CAEA27B8A889

Figures 3A View Figure 3 , 4 View Figure 4 , 5 View Figure 5 A-E

Material examined — Holotype (MLU), sequenced (voucher code: CCDB 38361 View Materials H03), Montenegro, northeastern Montenegro, Komovi Mt. , Trešnjevik, spring, 42.739 948 N, 19.680 511 E, 24 June 2021, leg. V. Pešić, body length 52 mm, width 10 mm, dissected . Paratypes: five specimens (body length/width: 34/ 6.5 mm, 32/ 6 mm, 31/ 6 mm, 22/ 5 mm, 18/ 4.5 mm; MLU), same data as holotype , one specimen of them sequenced ( CCDB 38361 View Materials H04). All material is deposited in the zoological collection of the Martin-Luther-University Halle-Wittenberg / Germany (MLU) .

Locus typicus — Montenegro, Northeast Montenegro, Dinaric Mountains, Komovi Mt., Trešnjevik, spring, 42.739 948 N, 19.680 511 E.

Diagnosis — Medium sized leeches; dorsal side dark brownish to black with large bright yellowish spots on each annulus and a pair of dark paramedian stripes; ventral side brigther grayish to light brown; annulation Dina -like: quinqueannulate with annulus b6 broadened, genital pores are separated by two annuli (male gonopore in furrow b2/a2, the female in furrow b5/b6); papillae on dorsal and ventral sureface very small; eyes are greatly reduced, no or only a few eyes visible.

Description

Habitus — Medium sized leeches; preserved and contracted adults reach a body length up to 52 mm and a width up to 10 mm (holotype). The body dorso-ventrally flattened, the first third (preclitellar and clitellar region) cylindrical. The caudal sucker only slightly wider than the half of maximum body width. The cranial sucker has a wide but slightly narrowed mouth opening with no or only slightly elongated upper lip. Papillae small and inconspicuous on the dorsal and ventral surface.

Annulation — The annulation typical for the genus Dina . The midbody somites quinqueannulate and heteronomously subdivided by clear furrows into annuli b1, b2, a2, b5 and the broadened annulus b6. The annuli do not show a tendency to split; only sometimes, b6 is subdivided by a very shallow furrow on the ventral side; the splitting is mostly not visible on the lateral side, but the tendency to split the annuli increases slightly in the posterior half of the body, but is never obvious.

The male genital pore situated in the furrow b2/a2, the female in the furrow b5/b6; the genital pores separated by two annuli.

Eyes — This new species is characterized by a strong reduction of visible eyes. Only two leeches of the examined material have visible eyes. One specimen (paratype, 34 mm in length) has a single eye that vas poorly visible; in the second specimen (paratype, 18 mm in length) four very small eyes were present, also faintly visible, situated in the anterior transverse row.

Colour — Dorsal side brownish to blackish with numerous yellowish spots of each annulus in similar number; sometimes there are more spots on annulus a2, than the leech has yellowish transverse rows. Paramedian stripes dark and wide, by yellowish spots with dissolved contours. The anterior part (rarely the posterior part) medially lighter between the stripes. Ventral side brighter.

Sexual organs — Genital atrium: atrium body large; cornua thin and short (reaches to b1/b6), distinctly curved to the ventral side, the ends straight and not coiled. Vas deferens almost straight up to the end of the second somite after the female gonopore, strongly coiled and thickened from the third ganglion to the sixth somite after the female gonopore. Ovisacs in the entire expansion dorsally over the vasa deferentia, anterior part uncoiled, strongly coiled from the second ganglion after the female gonopore up to the third somite.

Etymology — Named after the country from which the type material was collected. Differential diagnosis — In regard to the external morphology Dina crnogorensis sp. nov. is most similar to D. minuoculata Grosser, Moritz & Pešić, 2007 and D. serbica Pešić & Grosser, 2022 , from the same geographical region, and Dina orientalis Grosser, Nesemann & Pešić, 2011 from the Near and Middle East. All four species share the presence of bright yellowish spots on the dorsal surface of each annulus. The two species from the Western Balkans can be separated from the new species in the shape of ovarian sacks. The ovisacs in D. minuoculata are not coiled and extend to the end of the third somite after the female genital pore; in D. serbica the ovisacs are coiled and short, reaching to the second ganglion after the female genital pore. Dina orientalis , a species originally described from Lebanon but also reported from Syria, Turkey and Iran ( Grosser et al. 2011), resembles the new species in the shape of ovisacs, but differs in vas deferens which becomes slightly coiled from the fourth (rarely third) ganglia behind the female genital pore and by more numerous (12 – 17) yellowish spots on annuli a2 and b5 and rarer on b6.

In addition to the above-mentioned species, the only yellowish spotted species from the Balkans is Dina latestriata Neubert & Nesemann, 1995 , which can be easily distinguished by genital pores separated by three annuli (not two annuli as in D. crnogorensis sp. nov. and the other mentioned yellowish spotted species).

Distribution – Montenegro; so far only known from the locus typicus, a spring in northeastern Montenegro.

Habitat – The new species was collected in a spring situated in a deciduous forest dominated by the common beech ( Fagus sylvatica L.).

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Annelida

Class

Clitellata

Order

Arhynchobdellida

Family

Erpobdellidae

Genus

Dina

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