Claudecypria rochei, gen. et spec. nov.
Creators: name: Almeida, Nadiny Martins De
name: Ferreira, Vitor Góis
name: Martens, Koen
name: Higuti, Janet
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Ostracoda
Podocopida
Candonidae
Claudecypria
Claudecypria rochei

description: Claudecypria rochei gen. et spec. nov.
(Figs 46–49)
Diagnosis. Cp suboval, LV strongly overlapping RV, except in the middle of dorsal margin, and especially along the anteroventral and posteroventral margins; flanges broad there. Marginal tubercles on RV weakly developed. A2 with natatory setae well-developed, short accompanying seta absent; male A2 with four-segmented endopodite and with t2 and t3 transformed into sexual bristles. Rpp and Lpp asymmetrical. Rpp with broad first segment, with slightly curved dorsal margin and strongly developed, bluntly pointed distal margin; second segment subtriangular, with pronounced dorso-distal corner and straight distal margin. Lpp with first segment with a broad base, distally tapering; second segment with broad base, distal part sickle-shaped, narrowing. T1 with one long and hirsute seta next to the two a-setae. T2 without d1 and d2 setae. T3 without dp and d2 setae in both male and female. CR with a short proximal seta. Hp with ls broad, distally shaped as a bird beak, with ventrally directed beak; ms a broad, elongated and slightly dorsally curved lobe, distally asymmetrically rounded and almost reaching the edge of ls.
Differential diagnosis. Claudecypria rochei gen. et spec. nov. can be distinguished from other Physocypria s.l. species mainly by the aberrant morphology of the Hp and prehensile palps, which is comparable (yet still very different) only to that of Claudecypria mesquitai gen. et spec. nov. (see above), and by the large flanges on the LV, which cause an exceptionally large overlap of the LV over the RV, especially along the anterior and anteroventral sides and along the posteroventral margin. Keysercypria deformis, Physocypria longiseta and P. nipponica somewhat resemble Claudecypria rochei gen. et spec. nov. in the shape of the valves. However, the dorsal margin of the LV is straighter in the new species and also, the overlap in the new species is much more prominent than in these taxa, while the morphology of the male reproductive organs is radically different.
Claudecypria mesquitai gen. et spec. nov. differs from C. rochei gen. et spec. nov. by a smaller LV overlap on RV, while the flanges on the LV are also much larger in the latter species. Also the Hp and the prehensile palps are very different between the two species, but still more similar to each other than to those of the other species of Physocypria s.l., including those of Brasilocypria gen. nov.
Material examined. Type locality: South Matogrossense Pantanal, Camp Road, pool 4 (PAN 31), in macrophytes. Coordinates: 19°34′34′′ S, 57°1′7′′ W.
Type material: Holotype: A male, with soft parts dissected in glycerine in a sealed slide and with valves stored dry in a micropaleontological slide (MZUSP 43195).
Allotype: A female, dissected and stored as the holotype (MZUSP 43196).
Paratypes: Three males dissected and stored as the holotype (MZUSP 43197, MZUSP 43198, MZUSP 43199). One male carapace stored dry in a micropaleontological slide (MZUSP 43200).
Two females dissected and stored as the holotype (MZUSP 43201, MZUSP 43202). Three female carapaces stored dry in micropaleontological slides (MZUSP 43203, MZUSP 43204, MZUSP 43205).
Etymology: This species is named in honour of Prof. Kennedy “Ken” Roche (Universidade Federal do Mato Grosso do Sul, Campo Grande, Brazil), in recognition of his significant contribution to Brazilian limnology, and with gratitude for years of friendship with JH and KM.
Measurements of illustrated specimens. See Table 2.
Description of male. Valves with suboval shape, with greatest height just in front of middle on LV and in middle on RV. LVi (Figs 46A, C–D) with narrow calcified anterior and posterior inner lamella; an inwardly displaced inner list running along the anterior margin, ending in an internal anteroventral tooth; tubercle-socked displaced along anteroventral and posteroventral margins.
RVi (Figs 46B, E–F) with narrow calcified anterior and posterior inner lamella and an inwardly displaced inner list along the anterior margin, disappearing in anteroventral margin; strong marginal tubercles along posteroventral margin, weakly along the anteroventral margin and absent in the middle of ventral margin.
CpRl (Fig 46G) with a suboval shape, with greatest height behind middle; LV overlapping RV along all margins, with greatest overlap in anterior and posteroventral side. CpD (Fig 46H) and CpV (Fig 46I) with greatest width in middle, external surface with shallow pits and setae and geometric ornamentation (Fig 46J).
Only the differences with the male of Claudecypria mesquitai gen. et spec. nov. are described here.
A1 (not illustrated) third segment with two apical setae: ventrally with one short seta almost reaching tip of fourth segment and dorsally with one short seta reaching middle of fourth segment. Terminal segment with one short hirsute seta, ca. 3x of length of aesthetasc Ya.
A2 (not illustrated) exopodite a small plate with two short and one long hirsute seta (the latter slightly longer than the second endopodal segment). Terminal segment with g-seta slightly shorter than y3.
Md-palp (not illustrated) third segment with three groups of setae: dorsally one group of four setae (two long and two short, ca. 1/3 of longest). Terminal segment with L ca. 2x basal width.
Mx1 (not illustrated) first endite short with two basal setae (one short and one long, about 5x length of previous one).
T1 with protopodite (Fig 47A) and endopodite (asymmetrical prehensile palps) (Figs 47B–C). Protopodite apically with a group of 16 unequal and hirsute setae, two short smooth a-setae, one short smooth b-seta, one long and hirsute d-seta (6x length of b-seta), and one long and hirsute seta next to the two a-setae (2x length of d-seta). Rpp (Fig 47B) with broad first segment, with slightly curved dorsal margin and strongly developed, bluntly pointed distal margin; second segment subtriangular, with pronounced dorso-distal corner and straight distal margin. Lpp (Fig 47C) with first segment with a broad base, distally tapering; second segment with broad base, distal part narrow.
T2 (not illustrated) first endopodal segment with one apical hirsute e-seta, reaching beyond tip of second endopodal segment. Second endopodal segment with one apical hirsute f-seta, reaching the tip of third endopodal segment. Third endopodal segment with one subapical hirsute g-seta, reaching beyond tip of the terminal segment. Terminal segment with one dorsally hirsute h3-seta, same length of h1.
T3 (not illustrated) first segment without dp-seta and with one short and hirsute d1-seta (ca. 1/2 length of first segment).
CR (Fig 47D) well-developed and robust, with one short proximal seta (ca. 1/4 length of ramus), subapically with one serrated claw, apically with one long serrated claw and one short and smooth seta.
Zenker’s organ (not illustrated) about 3x longer than wide, with ca. 5 spiny whorls.
Hp (Fig 47E) with ls broad, distally bird-shaped with ventrally directed ‘beak’; ms a broad, elongated and slightly dorsally curved lobe, distally asymmetrically rounded and almost reaching the edge of ls.
Description of female. Only the differences with the male of Claudecypria rochei gen. et spec. nov. are described here.
LVi (Figs 48A, C–D) and RVi (Figs 48B, E–F) higher than male. CpRl (Fig 48G) with a suboval shape, with greatest height behind middle; LV overlapping RV along all margins, except in the middle of dorsal margin, with greatest overlap in anterior and posteroventral side. CpD (Fig 48H) and CpV (Fig 48I) with greatest width in middle, external surface with shallow pits and setae and geometric ornamentation (Fig 48J).
A2 (not illustrated) protopodite with one long apical hirsute seta reaching well beyond tip of end claws. Exopodite a small plate with two short and one long hirsute seta (the latter reaching beyond tip of terminal segment). Third endopodal segment apically with three claws (G1, G2, G3) and three setae (z1, z2, z3). Terminal segment with accompanying seta (ca. 5x length of aesthetasc y3).
T1 (Fig 49A) with protopodite apically with a group of 16 unequal and hirsute setae; two short smooth a-setae, one short smooth b-seta, one long and hirsute d-seta (6x length of b-seta), and one long and hirsute seta next to the two a-setae (almost 3x length of d-seta). Endopodite apically with three unequally smooth and short setae.
T2 (not illustrated) first endopodal segment with one apical hirsute e-seta, slightly shorter than second endopodal segment. Terminal segment with two short setae, both hirsute, hirsute, h3-seta slightly shorter than h1; and a long h2-seta (ca. 2/3 the length of this segment).
T3 (not illustrated) first segment without dp-seta and with one short and hirsute d1-seta (ca. 1/4 length of first segment).
CR (Fig 49B) well-developed and robust, with short hirsute proximal Sp-seta (ca. 1/3 of length of ramus), subapically with serrated Gp-claw, apically with long serrated Ga-claw and short and hirsute Sa-seta.
Ecology and distribution. Claudecypria rochei gen. et spec. nov. was recorded only from South Pantanal Matogrossense, associated with different species of macrophytes. The water temperature was 23°C. The pH recorded was 7 and the electrical conductivity was 209 μS. cm-1 (see Table 1).
description: Published as part of Almeida, Nadiny Martins De, Ferreira, Vitor Góis, Martens, Koen & Higuti, Janet, 2023, 5237, pp. 1-88 in Zootaxa 5237 on pages 72-78, DOI: 10.11646/ZOOTAXA.5237.1.1, http://zenodo.org/record/7640078