Italian marine Gastrotricha: I. Six new and one redescribed species of Chaetonotida

Abstract

The species Chaetonotus lacunosus Mock, 1979 is redescribed and refigured from specimens collected in littoral and shallow sublittoral sediments along the entire Italian coastline of the Mediterranean Sea and its adjacent waters. Six species new to science are described and figured: Chaetonotus apecbocbaetus, C. apolemmus, C. siciliensis, Halichaetonotus etrolomus, H. margaretae, and H. thalassopais. The proper nomenclature for Halichaetonotus decipiens (Remane, 1929) is noted, and a new combination is given: Musellifer delamarei (Renaud-Mornant, 1968) n. comb.

Marine gastrotrichs from the Tuscan achipelago (Tyrrhenian Sea): II. Chaetonotida, with description of three new species

“…Hummon, Balsamo & Todaro, 1992 Geographic distribution and ecology -Found with a certain frequency in sublittoral fine sand along the coasts of Tuscany, Campania and in the Archipelago of Campania, it has also been reported from Sicily {Chaetonotus sp., Todaro & Balsamo, in press). Hummon, Balsamo & Todaro, 1992 Geographic distribution and ecology -First found in Italy along the coasts of Latium, Campania, Sicily, Apulia and the Marches, and reported also from Greece (Hummon & Roidou, in press).…”

“…Halichaetonotus margaretae Hummon, Balsamo & Todaro, 1992 Localities -ELBA, V.1990: Fetovaia, SL, 1 ind; Zuccale, SL, 1 ind. CAPRAIA, IX.…”

“…GIGLIO: Campese, V.1990, SL, 4 ind. (Hummon & Roidou, in press) and in numerous sites along the coasts of Italy, from the Tyrrhenian Sea to the northern Adriatic Sea (Hummon et al, 1992).…”

“…Remarks -This species, originally included in the genus Polymerurus, because of the long furcal appendage, was recently transferred to the genus Musellifer (Hummon et al, 1992). Total length of the only specimen measured was 173 um; furca 53 um; adhesive tubes 20 um.…”

A new species of freshwater Chaetonotidae (Gastrotricha, Chaetonotida) from Obodska Cave (Montenegro) based on morphological and molecular characters

“…Each of the specimens was documented by means of a set of photomicrographs. The species description follows the convention of Hummon et al (1992), in which the longitudinal distance of a morphological character from the anterior end is expressed as percentage units (U) of the animal's total length (i.e., the distance of the character from the anterior end, divided by the total body length, and multiplied by 100). The identification of gastrotrichs, their morphological study and terms follows Kisielewski (1981Kisielewski ( , 1991Kisielewski ( , 1997 and Kolicka et al (2016).…”