Cavernocypris reddelli, Külköylüoğlu, 2020
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publication ID |
https://doi.org/ 10.12651/JSR.2020.9.2.122 |
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persistent identifier |
https://treatment.plazi.org/id/03F887AB-FFEF-FFD4-FCE4-4A36FDC1F82C |
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treatment provided by |
Felipe |
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scientific name |
Cavernocypris reddelli |
| status |
sp. nov. |
Cavernocypris reddelli n. sp. ( Figs. 2-4 View Fig View Fig View Fig )
Type specimen. Holotype: Male (OK-TX-BeCo-01), dissected in lactaphenol solution with soft body parts and sealed in a glass-cover. Valves stored dry in a micropalaeontological cavity slide (OK-TX-BeCo-03). Collected from the type locality on 17 April 2001.
Diagnosis. During the present work, the amended diagnosis of Smith et al. (2017) was followed. Carapace elongate, similar to the type species of the genus but larger. Height more than half of the length. Posterior margin more rounded than anterior margin. Left valve overlaps right valve. Dorsal view anterior margin more pointed than posterior margin. Valve surface with shallow and small pits.
Type locality. Jelly Bean Spring (8A-1), Camp Bullis. Bexar County. Texas. U.S.A. 17 April 2001. Collected by James Reddell and M. Reyes from Texas Memorial Museum Invertebrate Zoology Collection (catalog number: 36,863) .
Allotype. Female (OK-TX-BeCo-02) dissected in lactaphenol solution with soft body parts. Valves of the allotype preserved in micropalaeontological cavity slide (OK- TX-BeCo-04).
Paratypes. Two females (OK-TX-BeCo-05; OK-TX- BeCo-06) and two males (OK-TX-BeCo-07; OK-TX- BeCo-08), mounted and sealed in glass slides, collected from the type locality on 17 April 2001; twelve females and four males and nine juveniles collected from type locality on 31 May 2007.
Additional material examined. 11 females and five males collected on 25 July 2007 and 12 females and four males and three juveniles on 02 October 2007 collected from Copperhead Spring Cave . Many adults collected from Cute Chick Spring on 31 March 2010 .
All materials are kept in 70% ethanol and deposited at the Limnology Laboratory, Bolu Abant İzzet Baysal University, Department of Biology , Hydrobiology Subdivision, Bolu, Turkey .
Etymology. The species is named after James R. Reddell, who kindly provided the samples, and for his continuous contribution to the knowledge of invertebrates and insects in Texas.
Description of male. Measurements (based on midl e n g t h): L =0.7 5 -0. 7 7 m m, H = 0. 3 7 -0. 4 0 m m, W = 0.37-0.4 mm (Average: L = 0.767 mm, H = 0.383 mm, W = 0.396 mm [n = 3]). H/L = 0.487 -0.501 (Average: 0.499 mm); W/L = 0.487 -0.545 (Average: 0.519 mm) ( Fig. 2A- C View Fig ). LV overlaps RV ( Fig. 2C View Fig ). Carapace elongate in shape. Marginal pore canals more prominent ventrally in RV than LV. Fused zones present. Selvage well-developed on both valves. Dorsal margin slightly arched. Greatest height approximately at center. Valve surface with small shallow pits and thin setae. In dorsal view ( Fig. 2C View Fig ), posterior margin more rounded than anterior margin. Lateral lines slightly concave posteriorly. Calcified inner lamella wider in anterior margin than posterior in both valves ( Fig. 2D, E View Fig ). Posterior list present in LV ( Fig. 2F, G View Fig ), absent in RV. Six big muscle scars locat- ed closer to center ( Fig. 2H View Fig ). Eye visible with small black pigment. Color greenish to blueish.
Antenulle (A1): 7 segmented ( Fig. 3A View Fig ): First segment with an x-shaped articulation, and a finely plumosed seta medium in length on dorsal margin, and two unequally long finely plumosed setae on ventral margin (anterior one slightly shorted than posterior). Wouters organ (WO) short with slightly plumosed terminal end. Second segment with one small dorsal-apical seta in about 1/4 th of the same segment, Rome organ short about the same size with WO on ventral margin. Third segment with a thin and long dorsal-apical seta reaching almost to the end of terminal segment. Fourth segment with two long dorsal-apical setae, and one short and thin ventral-apical seta. Fifth segment with two long dorsal-apical setae, and one short ventral-apical setae. Sixth segment with three long setae. Terminal segment with two long setae and one medium-length aesthetasc ya.
Antenna (A2): 4 segmented ( Fig. 3B View Fig ). First segment with a strong base, and a long thin dorsal-apical seta slightly exceeding the next segment. Second segment with one long and two small setae on exopodial plate, and with six short natatory setae on inner edge of the segment, 6 th seta short- er, longest one barely exceeding half way of the segment, and one well developed plumosed dorso-apical seta slightly exceeding the terminal segment. Aesthetasc Y short in about 1/4 of the segment. Third segment with two medium sized setae in dorsal edge, t1 and t2 setae plumosed in about similar size, t3-4 setae not seen (compare with female). G1 and G2 claws well developed in about the same size, G3 very short seta-like about 1/3 of G1. Seta z1 small, z2 seta-like plumosed slightly shorter than G1 claw, z3 thin seta-like slightly longer than G1. Terminal segment with a well-developed GM claw, Gm claw very short about 1/4 of GM, and a very short y3. Setae y1-2 not seen. All claws serrated and slightly curved at the end.
Mandible (Md) ( Fig. 3C View Fig ): Coxa with 5 well developed teeth and a medium-sized plumosed seta internally. Palp 4 segmented. First segment with four setae (S1, S2, alpha and a smooth setae). S1 and S2 plumosed and about equal in length. S2 seta slightly s-shaped. Alpha seta plumosed about 1/3 of S1 seta. Vibratory plate with 6-7 well developed setae, first one smaller. Second segment with a group of 3 smooth setae internally and slightly small- er than S1 seta. Beta seta tapering to hirsute distal end, about 1/2 of S2 seta. Two long smooth reaching end of terminal segment and one short hirsute seta about size of this segment located distally. Third (penultimate) segment with four slightly plumosed externodistal setae exceeding terminal segment. Gamma seta slightly plumosed with setules thin similar in size with other 3 setae located anterodistally. Length size gamma>beta>alpha. Terminal segment with unequally long 3 claws, longer one slightly hirsute. L ratios of 4 segments measured in middle 2.5: 1.25: 3.25: 1.
Maxillula (Mxl) ( Fig. 3D View Fig ): Three endites and a two-segmented palp with a well-developed vibratory plate with 12 plumosed setae. First, second, and third endites with 6 (2 long 4 short), 4 similar in size and 6 (4 smooth 2 bristle-like [Zahnborsten] setae), respectively. Base of first endite with two medium-sized slightly plumosed setae. First segment of Mx-palp with 5 setae (2 long smooth, 2 medium-sized plumosed and 1 short seta). Terminal (second) segment rectangular (length 2 × width) with 4 clawlike and a smooth setae in about equal in size.
Rake-like with 7 teeth ( Fig. 3E View Fig ).
Hypostome wide with hirsute opening ( Fig. 3F View Fig ).
First thoracic leg (T1): Prehensile palps, almost similar in size, ending with hooked-like fingers modified into clasping organs. Right finger ( Fig. 3G View Fig ) stronger and more robust than left one ( Fig. 3H View Fig ). Endite (masticatory process) with 8 plumosed apical setae in about equal size. Two unequally long “a” setae (short seta 1/2 of long seta) and a medium-sized “d” setae present, setae “b” and “c” absent. Vibratory plate with four hirsute medium-sized setae.
Second thoracic leg (T2) ( Fig. 4A View Fig ): Five segmented with a medium-sized d2 seta on first segment (d1 and dp setae missing). Second, third and fourth (penultimate) segments with e, f, g setae plumosed, respectively. Length ratio: e>f>g. Terminal segment subrectangular, with a short and slightly plumosed h1 seta and very long claw (h2) reaching about half of second segment.
Third thoracic leg (T3) ( Fig. 4B View Fig ): Three segmented with almost equally long and slightly hirsute d1, d2 and dp setae on first segment. Second and third segments with slightly plumosed “e” and “f” setae, respectively. Seta “f” located from middle of third segment and about 3x short- er than “f” seta. Same segment ending with pincer organ, h1 very short, h2 hooked-like and h3 seta-like extending about halfway of third segment.
Hemipenis ( Fig. 4C View Fig ): Medium in size, lobe “a” (outer lobe) with pointing protrusion (diagnostic character), lobe “b” not clearly seen, lobe “h” small semirectangular.
Zenker organ ( Fig. 4D View Fig ): with 16 (14 + 2) whorls ending with sperm canal.
Description of female. Carapace similar in shape and length of male ( Fig. 2I View Fig ). Female L = 0.75-0.77 mm, H = 0.374 -0.375 mm, W = 0.375 -0.420 mm. Average: L = 0.76 mm, H = 0.375, W = 0.398 mm (n = 3). H/ L = 0.480 -0.500 mm (Average: 0.495 mm); W/L = 0.500 - 0.545 mm (Average: 0.525 mm). T1 ( Fig. 4F View Fig ) normally developed in about same size with male clasping organs, endopod with 2 long and one short subequal h1-3 setae (h1>h2>h3). Seta h3 1/3 of h2. All plumosed. Endite with 10 apical setae. G-claws (length ratio G1 ≈ G3 ≈ GM>G2>Gm) present ( Fig. 4E View Fig ). Setae z1-3 thin slightly exceeding halfway of terminal claws. Uropod ( Fig. 4G View Fig ): not seen in males, flagellum type (cypridopsine type) with an elongated base and one posterior seta. Genital part rounded and without a copulatory appendages. All other soft parts similar to that of male.
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