taxonID	type	description	language	source
03888731FFB9FFD6E288FF6AFAE36F8E.taxon	diagnosis	Diagnosis of the genus Schellencandona (modified after Meisch 1996, 2000) Carapace small, 0.4 – 0.6 mm long. Valves trapezoidal, subtrapezoidal, triangular or reniform, in some species LV and RV strongly asymmetrical in lateral view. Valves smooth or with shallow pits. Eye pigment absent. Male antenna dimorphic: penultimate segment subdivided and with male bristles (t 2 and t 3 - bristles transformed). Setal group on the second segment of the mandibular palp with three setae; externo-distal seta (gamma-seta) of the penultimate segment smooth. Mx respiratory (branchial) plate with two setae. Cleaning leg: basal segment (protopod) with two setae (d 1 and dp); penultimate segment with one distal seta (seta g); terminal segment with one short (h 1) and two long setae (h 2 and h 3). Zenker organ with four + two rings of spines. M-process of the penis very flat.	en	Rossetti, Giampaolo, Mazzini, Ilaria, Bruno, Maria Cristina (2025): On the occurrence of the genus Schellencandona (Ostracoda, Candonidae) in Italy, with the description of a new species. Zootaxa 5723 (2): 189-208, DOI: 10.11646/zootaxa.5723.2.2, URL: https://doi.org/10.11646/zootaxa.5723.2.2
03888731FFB9FFDAE288FDBAFB506F8D.taxon	description	(Figures 1 – 3) Type locality. Toncina Stream, approximately 600 meters upstream of its confluence with the Ceno River, near the locality of Molino dei Belli, in the municipality of Bardi, Parma, Italy. Latitude 44 ° 35 ’ 39.9 ” N, longitude 9 ° 42 ’ 15.8 ” E, elevation about 430 m a. s. l. Type material. Holotype: adult ♀ (MZUF 726, LV: L = 575 µm, H = 360 µm; RV: L = 564 µm, H = 311 µm) collected on July 13, 2018: soft parts dissected in glycerine in a sealed slide, valves stored dry in a micropalaeontological slide. Paratypes: adult ♀ (MZUF 727, Cp: L = 550 µm, H = 340 µm) collected on August 3, 2018: soft parts dissected as the holotype, valves lost during dissection; adult ♀ (MZUF 728, LV: L = 543 µm, H = 332 µm; RV: L = 539, H = 298 µm) collected on July 13, 2018: soft parts dissected as the holotype and valves stored dry in a micropalaeontological slide; adult ♀ (MZUF 729, RV: L = 533 µm, H = 299 µm) collected on November 16, 2024: isolated RV stored dry in a micropalaeontological slide. The specimens were collected by Linda Faè in 2018 and by GR in 2024. Etymology. This new species is dedicated to, and named, in honour of Antonia Cavalieri, a passionate naturalist devoted to the preservation of the environment and biodiversity, who also happens to be the beloved wife of the first author. Description of female. Valves trapezoidal in lateral view (Fig 1 A – B, G). LV larger than RV. Greatest H slightly less than ½ L and located slightly behind mid-length. Greatest L below mid-height. Anterior margin broadly rounded, posterior margin narrowly rounded. Dorsal margin straight, tapering posteriorly, gently arched on LV, posteriorly slightly sloping, more steeply than anteriorly. On RV, anterior cardinal angle slightly concave. Reticulate surface organized in strongly calcified polygonal muri and smooth fossae. Normal pore canals simple. Hinge adont (Fig 1 C – D, E): LV with smooth groove; RV with smooth bar. In internal view (Fig 1 C – D, E), calcified part of inner lamella wide anteriorly. Ventral margin of LV with slight but distinct convexity in the middle, complementary expansion of selvage on RV. Central muscle scar arrangement as characteristic for Candoninae (Fig 1 F). A 1 seven-segmented (Figure 2 A); first segment bearing a seta along ventral margin and two long, apical-dorsal setae of similar length; second and third segments with one ventral seta each, both slightly exceeding and reaching the margin of next respective segment; fourth and fifth segments with one long apical-ventral seta and one tiny apical-dorsal seta each; sixth segment with three long apical setae, one tiny apical-dorsal seta and seta α slightly exceeding the margin of next segment; seventh segment with a long aesthetasc ya and three apical setae, two of which very long and the most dorsal one as long as about the last two segments together. A 2 (Figure 2 B): protopodite two-segmented, first segment (not shown) with two ventro-apical setae and one long dorsal seta, second segment with long subapical seta on ventral edge. Exo with long seta reaching 4 / 5 of next segment and two tiny setae, the ventral-most one with enlarged base. Endopodite three-segmented; first segment with aesthetasc Y inserted just below half of ventral margin and reaching approximately to distal edge of same segment, and two ventro-apical setae, the longest one extending slightly beyond distal margin of last endopodal segment, and about 2.5 times as long as the other; second endopodal segment with seta at mid-dorsal margin just surpassing distal end of segment, aesthetasc y 1 proximally on ventral margin, three unequal t setae inserted about mid- segment, three short z setae, dorso-apical claws G 1 and G 2 with length ratio c. 4: 1, apical-ventral claw G 3 reaching to tips of claws G 1 and GM, aesthetasc y 2 barely exceeding distal margin of next segment; last endopodal segment distally with claw Gm and GM in a ratio of 1 to 2, and more ventrally aesthetasc y 3 with thin accompanying seta; GM about twice as long as combined length of last two endopodal segments; g seta not observed. Md (not shown): palp four-segmented; first segment with long seta, S 1 seta slightly longer than former one, short alpha seta and S 2 seta short and stout on distal part of ventral margin; second segment with ventrally three long, subequal setae (setal group), a short beta seta and an additional seta extending to just before distal end of last segment, and two dorsal setae of different lengths in subapical position; apical part of third segment with three dorsal setae, a ventral seta and centrally a gamma seta long and smooth; last segment with two ventral setae and two dorsal claws, the innermost one stout and with enlarged base. Coxa narrow. Mx (Figure 2 C): palp two-segmented; first segment bearing four setae of which three in outer position and one more central; second segment with two robust, long setae and four shorter, thinner setae. T 1: damaged in the available specimens. T 2 (Figure 3 A): five-segmented; basis (not shown) perhaps lacking d 1 seta; second segment with antero-distal seta e; third and fourth segments weakly subdivided, with f and g seta respectively; last segment with h 1 seta slightly shorter than bearing segment, stout apical h 2 claw about six times longer than terminal segment and tiny h 3 seta in subapical, posterior position. T 3 (Figure 3 B): protopodite with short d 1 seta and long dp seta, the latter exceeding distal end of next segment; endopodite with three segments; first endopodal segment without setae, second segment with subapical g seta; third segment with three setae: h 1 short, h 2 strong and h 3 long and thin, with length ratio approximately 1: 2.7: 3.1. CR (Figure 3 C): rami stout, with long seta sp and strongly reduced seta sa; terminal claws robust and serrated, Ga length approx. 1.2 times Gp and 0.9 times the ramus length. CR attachment (Figure 3 D): straight, branched at both ends. Eye pigment absent. Description of male. Male unknown. Accompanying ostracods. One specimen of Cypria ophtalmica (Jurine, 1820) and an unidentified ostracod larval stage collected on 4 July 2018. Remarks Schellencandona antoniae sp. nov. is formally described here, despite only a few female specimens being available. We have chosen to proceed with the description as both valve and soft-part characteristics are provided, enabling us to clearly distinguish the new species from its congeners, even in the absence of important diagnostic features of the male which, although not found, is presumed to exist (see Discussion). Furthermore, repeated samplings at the type locality to collect additional specimens to be studied were unsuccessful.	en	Rossetti, Giampaolo, Mazzini, Ilaria, Bruno, Maria Cristina (2025): On the occurrence of the genus Schellencandona (Ostracoda, Candonidae) in Italy, with the description of a new species. Zootaxa 5723 (2): 189-208, DOI: 10.11646/zootaxa.5723.2.2, URL: https://doi.org/10.11646/zootaxa.5723.2.2
03888731FFB5FFDDE288FDBBFD996C19.taxon	description	(Figure 4) A single adult female specimen (MZUF 730) of the genus Schellencandona was found in a sample collected on 3 July 2018 (MCB coll.) from the interstitial zone of the Po River, near the locality of Martiniana Po (Cuneo, Italy; latitude 44 ° 39 ′ 16 ” N, longitude 7 ° 19 ′ 27 ” E, 351 m a. s. l.). The specimen’s left valve was severely damaged prior to dissection, making it unsuitable for the taxonomic description. RV (Figures 1 H – J) with straight dorsal margin slightly tapering towards posterior end. Evenly rounded anterior margin distinctly broader than posterior one, the latter gently tapering towards ventral corner. Surface covered by reticulate pattern organized in polygonal meshes, with weakly calcified muri and smooth fossae. The specimen shows notable similarity to Schellencandona insueta (Klie 1938) (see Figure 11, page 13 in Klie 1938 a). The valves are also very similar in size (L = 0.47 mm and 0.46 mm, H / L 0.51 and 0.52 in the specimen studied here and in S. insueta, respectively). In Klie (1938 a, 1938 b), the valves of S. insueta are described as smooth and hairy, but no mention is made of a reticulate pattern, which is instead evident in the specimen from the Po River also when observed in transmitted light. Regarding the soft parts of the female of S. insueta, Klie (1938 a) only published drawings of the cleaning leg and the furcal ramus. In the specimen examined here, the ratio between seta h 1 and seta g of the cleaning leg is approximately 2: 1 (Figure 4 A), whereas in S. insueta the two setae are of similar lengths (Klie 1938 a; Figure 15, page 14). Particularly interesting is the presence in the Po River specimen of two denticles and two rows of setulae on each of the two terminal claws of the furcal ramus (Figure 4 B), similar to what is illustrated by Klie (1938 a; Figure 16, page 14) for S. insueta. Notably, this feature is not detectable in any other known species of the genus Schellencandona. The studied specimen contained bundles of sperm inside the carapace, indicating the presence of males at the sampling site. Since only one specimen from the Po River was available and its preservation was insufficient, along with the lack of highly diagnostic male sexual characteristics, it seems advisable to refrain from fully confirming its specific status at this stage, despite the observed similarities to S. insueta. A more definitive verification will require the potential acquisition of additional material.	en	Rossetti, Giampaolo, Mazzini, Ilaria, Bruno, Maria Cristina (2025): On the occurrence of the genus Schellencandona (Ostracoda, Candonidae) in Italy, with the description of a new species. Zootaxa 5723 (2): 189-208, DOI: 10.11646/zootaxa.5723.2.2, URL: https://doi.org/10.11646/zootaxa.5723.2.2
