Baicalellia evelinae Marcus, 1946

João A. L. Braccini, Francisco Brusa & Ana M. Leal-Zanchet, 2017, Six freshwater microturbellarian species (Platyhelminthes) in permanent wetlands of the Coastal Plain of southern Brazil: new records, abundance, and distribution, Check List 13 (6), pp. 849-855 : 853-854

publication ID

https://doi.org/ 10.15560/13.6.849

DOI

https://doi.org/10.5281/zenodo.4606015

persistent identifier

https://treatment.plazi.org/id/4C1F8782-FFDD-E222-FCDB-6756FCA9FD0E

treatment provided by

Plazi

scientific name

Baicalellia evelinae Marcus, 1946
status

 

Baicalellia evelinae Marcus, 1946 View in CoL

Figures 10, 11A, B View Figures10–13

General morphology. Body 3 times longer than wide (body length to 0.6 mm), with rounded anterior and posterior tips ( Figs 10, 11A View Figures10–13 ). The pharynx measures up to 0.15 mm and shows pharyngeal tentacles forming an inverted cone towards the mouth. The male reproductive system consists of a pair of testes, a spherical seminal vesicle, and a C-shaped penis. The latter is constituted by a sclerotized tube, about 50 µm long, with a broad basis, gradually narrowing towards the tip ( Fig. 11B View Figures10–13 ). The female reproductive system shows a “bursa seminalis” located between the ovaries, and the uterus with an intestinal connection. The uterus contained 2 egg capsules, each with 2 eggs ( Fig. 11A View Figures10–13 ).

Specimens examined. MZU 00206: coll. J .A.L. Braccini and F . Brusa, 26 March 2012, Brazil, Rio Grande do Sul, Tramandaí (30°05ʹ09ʺ S, 050°10ʹ24ʺ W) .

Remarks on ecology and distribution. This species had moderate abundance in the winter/spring survey but was absent in the summer/autumn survey ( Table 2 View Table2 ). Baicalellia evelinae was previously reported from 3 localities in the state of São Paulo ( Marcus 1946). The current record represents a southeastern range extension of about 800 km.

J

University of the Witwatersrand

F

Field Museum of Natural History, Botany Department

S

Department of Botany, Swedish Museum of Natural History

W

Naturhistorisches Museum Wien

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