Eucypris lefkosaensis, Külköylüoğlu & Özdilek, 2024

Külköylüoğlu, Okan & Özdilek, Ahmet, 2024, Two new species of the genus Eucypris (Crustacea: Ostracoda) from Northern Cyprus, Zootaxa 5506 (1), pp. 58-78 : 66-72

Eucypris lefkosaensis n. sp.

( Figs. 7–11 )

Etymology. The species is named after LefkoŞa, the capital city of Northern Cyprus where the new species found.

Type locality: Dar Dere , shallow puddle of a temporary creek, Yılmazköy district, LefkoŞa, Northern Cyprus (35°13’23.9”N 33°10’36.8”E). Elevation ca 142 m. a.s.l.

Material examined. Holotype: Female dissected in lactophenol solution with soft body parts in a slide mounted and sealed with translucent nail polish (no: OK-CY1); valves in micropalaeontological cavity slides (no: OK-CY- V1). Collected from type locality on 21 May 2022 by Okan Külköylüoğlu, Ahmet Özdilek and Ali Özdilek.

Dissected paratypes: a female from type locality (no: OK-CY2).

Non-dissected paratypes: thirty-four females in70%ethanol.Collected from type locality by Okan Külköylüoğlu, Ahmet Özdilek and Ali Özdilek.

Other materials: 1) Gazimağusa province: one and two females collected from coastal zone at Glapsides wetlands on 19 May 2022 (35°09’37.4”N 33°54’43.7”E and 35°09’36.1”N 33°54’46.9”E, respectively) , 2) Şirinevler district: one female from an unnamed creek (35°16’24.1”N 33°10’09.9”E), and 3) Yılmazköy district : thirty females from an unnamed creek (35˚12’40’’N, 033˚10’12’’E) on 21 May 2022 .

Repository. Holotype and all paratypes stored at the Limnology Laboratory of the Biology Department, Bolu Abant İzzet Baysal University, Bolu, Türkiye.

Measurements (mm). Female (n=2): Length: 1.52–1.79 (mean= 1.66), Height: 0.87–1.06 (mean= 0.97), Width: 0.71–0.91 (mean= 0.81).

Description: Carapace ( Figs.7–8 ): Opaque whitish. In lateral view ovoid in shape, LV> RV,

LV with wider inner lamella than RV, inner list closer to the outer margin in LV, selvage present in RV, LV without selvage, hinge adont, greatest height found in the middle of the carapace, anterior and posterior margins rounded, carapace surface smooth with normal pores and thin setae.

A1 ( Fig.9A ): Seven-segmented. First segment without Wouters organ, and with two unequally long ventral setae and one smooth dorsal seta reaching about middle of the second segment. Second segment partially quadrangular with one smooth dorso-medial seta and without Rome organ; third segment with one long dorsal and two small ventro-apical setae; fourth segment with two unequally long ventro-apical setae and with two long dorsal setae; fifth segment with five unequally long setae; one long dorso-apical seta, reaching half way of terminal setae, one medium sized seta, and one very thin seta, two ventral setae long, extending ¾ of terminal setae; sixth (penultimate) segment with two equally long dorso-apical setae and three ventral setae; terminal (seventh) segment with three long setae and aesthetasc ya, three times longer than the length of the terminal segment.

A2 ( Fig. 9B ): Four-segmented. First segment with one smooth ventro-apical seta and three short basal setae. Second (first endopodal) segment with one long and two short exopodal setae, one short (sixth seta) and five long natatory setae extending tips of the terminal claws. Aesthetasc Y two-segmented. Penultimate (third) segment undivided with two long dorsal setae, four t-setae (t3>t4>t2>t1, t1 and t2 plumose), aesthetasc y2 longer than terminal segment. z-setae (z3>z2>z1) unequally long. Claws (G1>G3>G2) well developed and serrated. Terminal segment with well-developed GM and a short Gm claw (short, about 2/4 of GM), both serrated; aesthetasc y3 almost the same length as the terminal segment.

Md ( Fig. 9C ): Md-coxa with seven strong teeth, thin inner setae, and long, thin dorsal seta. Md-palp four-segmented; first segment with a long smooth seta, unequally long, plumose S1 and S2 setae, α setae thin and lunate. Vibratory plate with five plumose setae in different lengths. Second segment with four long plumose setae, β seta very thin, plumose, about the length of the second segment, and three external setae of almost equal length. Penultimate (third) segment with five long smooth external setae, γ seta robust with setules distally (reaching beyond the terminal segment), three smooth unequally long internal setae and two small setae. Terminal segment with two claws and two smooth setae.

Mx1 ( Figs.10A–B ): with three endites and two-segmented palps. First endite with 12 setae distally and two smooth setae at the base. Second and third endites with nine and six setae, respectively, both tooth bristles on third endite slightly serrated. First segment of palp with seven setae. Length of terminal palp segment slightly longer than broad and with four well-developed claw like setae. Vibratory plate with 18 plumose setae.

T1 ( Fig. 10C ): Two small a setae equally long and plumose, b seta smooth, d seta smooth and long, extending tips of terminal setae, c seta 2/3 of d seta and plumose. Length ratio of h setae: h2>h1>h3, both h1-3 plumose. Vibratory plate with four plumose and one smooth setae of different lengths.

T2 ( Fig. 10D ): Five-segmented. d1and d2 setae absent. Seta e plumose, f and g setae smooth (e=f>g); h1 seta short, h2 seta well developed, serrated and claw-like, seta h3 present and as long as seta h1 (but see discussion).

T3 ( Figs. 11A, B ): Three-segmented with smooth d1, d2 and dp setae. Length ratio of d-setae: dp>d2>d1. Seta e slightly plumose anteriorly, and seta f plumose (ca. length of f seta about half of seta e). Pincer organ present. Length ratio of h-setae: h3>h2>h1 (h1 hook-like).

Rake-like organ ( Fig. 11C ): with eight teeth.

Genital organ ( Fig. 11D ): smooth and rounded.

Hypostome ( Fig. 11E ): with a wide base covered with thin pseudochaetae.

Uropod ( Fig. 11F ): Claw Gp long, ca. 3/4 of claw Ga. Both claws serrated. Seta sp plumose; seta sa claw-like and smooth. Uropodal attachment slightly curved with a short ventral branch.

Males: unknown.

Accompanying ostracod species: Cyprideis torosa ( Jones, 1850) , Sarscypridopsis aculeata ( Costa, 1847), Heterocypris incongruens ( Ramdohr, 1808) , H. salina ( Brady, 1868) , Ilyocypris gibba ( Ramdohr, 1808) and I. decipiens Masi, 1905 .

Diagnosis. In lateral view, carapace smooth, ovoid, and anteriorly beak shaped. A1 without Wouters and Rome organs. A2 length of t-setae: t3>t4>t2>t1, plumose t-1 and t-2, Aesthetasc Y, y2 and y3 present, natatory setae extending tips of the terminal claws. Md vibratory plate with five smooth setae. Terminal segment of Mxl-palp slightly longer than broad with four well-developed claw like setae, vibratory plate with 18 plumose setae. Rake-like organ with eight teeth. Vibratory plate on T1 with four plumose and one smooth setae. Length of setae-h: h2>h1>h3. T2 five-segmented, d1 and d2 setae absent, length of e and g setae: e=f>g, e seta plumose. T3 three-segmented. Uropod well-developed, Ga claw more than 1/2 of the Gp claw, sp more than 1/2 of the Gp claw.

Ecology: Eucypris lefkosaensis sp. nov. was collected from a shallow puddle of a temporary creek with about 10 cm of depth. Physical variables of the type locality: elevation 142 m. a.s.l., water temperature 20.83 °C, pH 8.06, electrical conductivity 32.99 mS/cm, oxidation reduction potential 99.8 mV, total dissolved solids 16,46 ppt, atmospheric pressure 14.532 mmHg.

Other locations: Glapsides wetland where one and two females were found from two sites: depth 20 and 10 cm, respectively; elevation 6 m. a.s.l., water temperature 25.24 and 28.27 °C, pH 9.35 and 9.14, electrical conductivity 37.17 and 39.99 mS/cm, oxidation reduction potential 63.5 and 20.3 mV, total dissolved solids 18.79 and 20.01 ppt, atmospheric pressure 14.734 and 14.739 mmHg, respectively. Unnamed creek in the Şirinevler district: depth 10 cm, elevation 226 m, water temperature 17.21°C, pH 7.43, electrical conductivity 4.524 mS/cm, oxidation reduction potential 92 mV, total dissolved solids 2.262 ppt, atmospheric pressure 14.417 mmHg. Unnamed creek in the Yılmazköy district: depth 13 cm, elevation 160 m. a.s.l., water temperature 18.48 °C, pH 8, electrical conductivity 27.78 mS/cm, oxidation reduction potential 101 mV, total dissolved solids 13.89 ppt, atmospheric pressure 14.545 mmHg.

Figures

FIGURE 7. Eucypris lefkosaensis sp. nov. Female. (A) RV, external view. (B) LV, external view. (C) carapace in dorsal view (leaning slightly to the right). (D) muscle scars. Scale bar: 200 µm for A and B. 160 µm for C. 53 µm for D.

FIGURE 8. Eucypris lefkosaensis sp. nov. Female. (A) RV internal view. (B) RV internal view with enlarged anterior margin. (C) RV internal view with enlarged posterior margin. (D) LV internal view. (E) LV internal view with posterior margin extended. (F) LV internal view with anterior margin extended. Scale bars: 200 µm for A and D and C. 100 µm for B. 133 µm for E and F.

FIGURE 9. Eucypris lefkosaensis sp. nov. (A) A1. (B) A2. (C) Md. Scale bar: 100 µm for A. 95 µm for B. 140 µm for C.

FIGURE 10. Eucypris lefkosaensis sp. nov. (A) Mx1. (B) Mx1 vibratory plate. (C) T1. (D) T2. Scale bar: 110 µm for A. 70 µm for B. 90 µm for C. 80 µm for D.

FIGURE 11. Eucypris lefkosaensis sp. nov. (A) Terminal part of T3. (B) T3. (C) Rake-like organ. (D) Genital organ. (E) Hypostome. (F) Uropod with attachment. Scale bar: 59 µm for A. 60 µm for B. 186 µm for C. 240 µm for D. 110 µm for E. 93 µm for F.