Cypria lacrima, Külköylüoğlu & Akdemir & Yavuzatmaca & Schwartz & Hutchins, 2017

Külköylüoğlu, Okan, Akdemir, Derya, Yavuzatmaca, Mehmet, Schwartz, Benjamin F. & Hutchins, Benjamin T., 2017, Figs. 10 - 16 in Taxonomic Review of Zavreliella Kieffer from East Asia, Zoological Studies 56 (15), pp. 1-10 : 2-5

publication ID	https://doi.org/ 10.6620/ZS.2017.56-15
persistent identifier	https://treatment.plazi.org/id/03D05A7A-FFAC-FFE8-DFE2-7B0D148DFA74
treatment provided by	Felipe
scientific name	Cypria lacrima
status	sp. nov.

Treatment

Cypria lacrima View in CoL sp. nov.

Külköylüoğlu, Akdemir, Yavuzatmaca, Schwartz, Hutchins

( Figs. 1-4 View Fig View Fig View Fig View Fig )

urn:lsid:zoobank.org:pub:5E148559-380B-4F6A-9A4C-705285BB64B1

Material Examined: Holotype: Adult male with soft body parts dissected in lactophenol and sealed with translucent nail polish; valves kept in a micropalaeontological slides for SEM photography (OK-TX-AW053:01-02). Collected from type locality by Benjamin F. Schwartz and Benjamin T. Hutchins on February 12, 2013.

A l l o t y p e: One complete ñ with soft body parts dissected and sealed in a slide (OK-TX-AW053:03-04); valves kept in a micropalaeontological slides for SEM photography.

Paratypes: One ñ (OK-TX-AW053:05) and one ò (OK-TX-AW053:06) dissected and sealed in slides and their valves kept in micropalaenotological slides. Nine other specimens (2 males, 6 females, 1 broken LV) collected from the type locality were kept in 70% ethanol. Additionally, 67 individuals were collected from the type locality at different times as;

19 Nov. 2013. 2 individuals.

25 Nov. 2013. 1 individual.

02 Dec. 2013. 10 individuals, (1F and 1M mounted). 20 May 2013. 54 individuals.

Deposition of types: All specimens collected from the type locality deposited separately in the vials at the Abant İzzet Baysal University, Department of Biology, Subdivision of Hydrobiology (Bolu, Turkey).

Type locality: Artesian Wells, Edwards Aquifer, San Marcos, Hays County, Texas State University, Texas ( U.S. A). 29°53'22"N, 97°56'11"W, ~ 177 m ASL.

Etymology: The species is named after a latin noun “lacrima ” due to its “teardrop” shape. Gender feminine.

Diagnosis: This new ostracod species can be distinguised from other members of the genus by the following features: 1) shape and unique ornamentation on carapace; 2) presence of tiny tubercles on posterior margin of RV seen internaly; 3) absence of “e” and “g” setae on both T2 and T3; 4) presence of a long gamma seta on Md-palp; 5) asymmetric clasping organs; and 6) differences in the shape and size of other cheatotaxial parts. A detailed comparison among the species of the genus is provided along with ecological implications. This new report increases geographic distribution of the genus in the southern USA.

Description: Male: A small (L = 0.54 mm, H = 0.31 mm, W = 0.18 mm (n = 2)), subovoid to trapezoidal species in lateral view ( Figs. 1 View Fig A-C, E). In external view, carapace surface with pentagonal and squarish ridges and pits with normal pore openings. LV overlaps RV on all sides. Hinge adont ( Fig. 1A View Fig ). Greatest H anterior to the midlength. Anterior and posterior margins of the valves without tubercles. Anterior margin more rounded than posterior ( Figs. 1 View Fig B-C, E). In internal view, LV with tiny tubercles on the inner lamella extending from postero-ventral to postero-dorsal part ( Figs. 1C, G View Fig ). RV with a short salvage postero-ventrally ( Figs. 1E, D View Fig ). Inner lamella narrow in both margins. LV and RV with a node and a short node-like fringe antero-ventrally, respectively ( Figs. 1C, E, F View Fig ). Marginal zones of hinge area strongly curved inward in RV than LV. In dorsal view ( Fig. 1A View Fig ), carapace lateral line slightly convex, posterior end rounded, anterior end beak-shaped. Central muscle scars typical of the family ( Fig. 1B View Fig ). Color opaque white.

A1 ( Fig. 2A View Fig ): Seven articulated segments present. Two long slightly plumose apical setae on first segment well developed ventrally, longer one almost reaching to the end of terminal segment and shorter seta extending to the base of terminal segment. Two dorsal setae of the first segment with different size, the proximal one long reaching to the end of third segment and the distal short barely reaching to the next segment. One medium sized slightly plumose seta present medio-dorsally on the second segment. Rome-organ short tubular. Wouters organ absent. Third segment slightly longer than its width and with a short dorso-apical seta. Fourth segment with two unequally long smooth setae, dorso-apical seta long extending beyond the next segment and ventro-apical seta short in about 1/2 of the next segment. Fifth segment with two smooth sub-equally long dorso-apical setae, longer than the size of all segments of A1. One medium size seta on ventro-apical side, about the size of penultimate (6th) segment. Penultimate segment with 5 unequally long setae. One of the two smooth ventro-apical setae short in about 1/2 of the terminal segment, another long extending beyond the end of the terminal segment. Two thin antero-distal setae very long. One well-developed plumose dorso-apical seta in about 2 times the length of the terminal segment. Terminal segment with one ya aesthetasc 2x longer than the terminal segment and three long setae.

A2 ( Fig. 2B View Fig ): Five-segmented. Exopodial plate with one long and two very short setae. Second segment with a two segmented short aesthetasc Y placed medially on ventral margin. Hyaline portion about 50% of total length. The same segment with two long postero-proximal and postero-distal setae, former reaching to the end of third segment and the later plumose seta extending about half way of GM claw. Six natatory setae present; first five equally long exceeding the tips of terminal claws by about twice the length of the claws, sixth seta very short about one fifth of the third segment. Third segment with one well-developed claw-like seta dorso-anteriorly (t4?), one smooth seta and two t2 and t3 bristles. t2 straight and t3 slightly curved, both extending beyond terminal segment. Penultimate segment with all G claws present (length: G2> G3> G1); G1 claw short about 1/3 of G2. G3 claw slightly shorter than G2. Three z-setae (z1-z3) present, z1 seta claw-like and about the length 1/2 of G2, z2 and z3 setae short and about the length of terminal segment. GM and Gm claws on terminal segment different in size; GM slightly shorter than G3 claw, Gm very short about the size of the terminal segment. Aesthetasc y1 and y2 not observed, aesthetasc y3 plumose slightly extending tip of terminal segment. All claws slightly serrated terminally.

Md ( Figs. 2C, D View Fig ): Md-coxa well developed ending with 8-10 coxal teeth and one slightly plumose, medium sized dorsal seta ( Fig. 2D View Fig ). Md palp 4-segmented ( Fig. 2C View Fig ): vibratory plate on the first segment with 6 almost subequally long pappose setae dorso-medially. S1 seta thin and shorter than S2 seta in about 2/3 of its length. S2 seta well-developed reaching to the tips of terminal claws. Both setae plumose. Another seta on the same segment smooth equally long with S2 seta. Alpha seta not seen. Second segment dorsally with two subequally long setae, longer one about the size of penultimate segment, shorter barely extending halfway of this segment. Four plumose setae present internally (ventrally) almost reaching tips of terminal claws. Beta seta short and plumose. Penultimate segment with three smooth dorso-lateral setae almost reaching to the end of terminal segment. Two smooth setae (Gamma and a short seta) present antero-distally, Gamma seta longer extending to the tip of terminal segment. Terminal segment with three strong claws, two not fused with the segment, the middle one fused and slightly plumose. Terminal segment at least 4 times longer than wide.

Mxl ( Fig. 3A View Fig ): Three endites normally developed with 5, 4 and 4 setae, respectively. Third endite with two bristles and two short setae. One of the bristles slightly plumose, the other thin and smooth. No seta observed at the base of the first endite. First segment of the Mxl-palp with two smooth setae (apical seta slightly claw-like about the size of the terminal segment, shorter seta half of the segment) antero-distally and one smooth seta about the size of the terminal segment postero-distally. Terminal segment squarish with three slightly plumose claws. Vibratory plate well developed with 14 plumose long setae.

Rake-like organ ( Fig. 4B View Fig ): with a weakly serrated hammer shape.

T1 ( Figs. 3B, C View Fig ): asymmetric clasping organs with robust hook-like pointing finger. Right prehensile palp wider than the left palp, finger strongly curved downward, ending with a short claw-like process, lower part of trunk with a strong and sharp pointing process. Left palp with a short hook-shaped, curved finger. Vibratory plate with 5 well developed unequally long plumose setae. Two short, unequally long a setae and one d seta present, c and b setae not seen (but see discussion). Masticatory process with about 9-12 plumosed setae.

T2 ( Fig. 3D View Fig ): Five-segmented without basal (d1) seta. Seta e absent on the second segment. Seta f slightly plumose and short about 1/4 of the third segment. Penultimate segment without g seta (but see discussion below). Terminal segment with one long slightly serrated h2 claw about the length of the last three segments, and with h1 and h3 very short setae.

T3 ( Fig. 3E View Fig ): Four-segmented. First segment with slightly plumose d1, d2 and dp setae. dp seta long extending to the half way of penultimate segment. d1 seta about 1/2 of the d2. Second segment without setae. Penultimate segment with a medium sized f seta. e and g setae absent. Terminal segment subrectangular, about two times longer than wide with three setae (length: h3> h1 ≈ h2). h3 seta smooth reaching to the halfway of the second segment.

UR as in female ( Fig. 3F View Fig ): Normally developed with two slightly serrated claws, equally long anterior and posterior setae short about 1/6 of the anterior claw. Ramus robust 2x longer than anterior claw. UR attachment simple with one ventral branch.

Zenker organ ( Fig. 3G View Fig ): with 7 (5 + 2) whorls of spines, ending with 11-corrugated opening.

Hemipenis ( Fig. 4A View Fig ): Lobe a longer than lobe b. Lobe a subtriangular and distally rounded. Lobe b short, distally slightly noded and rounded.

Female ( Figs. 3F View Fig , 4 View Fig C-E): Female similar in shape but slightly longer (L = 0.55 mm, H = 0.32 mm, W = 0.16 mm (n = 4)) than male. A2 ( Fig. 4C View Fig ) 4-segmented. t1-3 setae thin, barely reaching to half way of terminal segment. z1-3 setae short and smooth slightly exceeding end of terminal segment. G claws present (length ratio: G3 ≈ G1 ≈ GM > G2> Gm), G1-G3 slightly serrated. T1 normally developed with five well developed plumose setae on vibratory plate and with two short unequally long slightly plumose a setae. Setae b and d short (but see discussion). Palp of T1 ending with 3 very short h-setae (h2> h1 ≈ h3) ( Fig. 4D View Fig ). Masticatory process of T1 ending with about 12 setae. Genital organ simple without appendages ( Fig. 3F View Fig ). All other parts are similar to that of holotype male. Hypostome ( Fig. 4E View Fig ) similar to male with rounded base with weak attachment.