Physocypria bullata Vávra, 1897

Karanovic, Ivana, 2011, On the recent Cyclocypridinae (Podocopida, Candonidae) with description of two new genera and one new species 2820, Zootaxa 2820 (1), pp. 1-61 : 45-52

Physocypria bullata Vávra, 1897

( Figures 25–30A, B )

1897 Physocypria bullata Vávra : 7, Figs 1–5

1944 Physocypria bullata Vávra —Klie: 11, Fig. 2 .

Redescription. Female: Carapace ovoid in lateral view ( Figure 26A ), L = 0.4 mm. Dorsal margin rounded on RV and flat on LV. RV overlapping LV dorsally with flange. Greatest H of RV lying around mid L and equaling 68% of L, on LV 63%. Both anterior and posterior margins rounded, but posterior being narrower than anterior one. Marginal pore canals short, straight and denser anteriorly than posteriorly. Selvage peripheral anteriorly, while posteriorly inwardly displaced. Ventral margin convex. LV overlapping RV anteriorly, posteriorly and ventrally. Both LV and RV with marginal tubercles along free margin.

A1 ( Figure 29B, D ): 7-segmented. First segment with two posterior and two anterior setae. Both posterior setae normally developed. Second segment with one anterior seta and a clearly visible Rome organ posteriorly. Third segment with one posterior and one anterior seta. Fourth and fifth segments with two short posterior and two long anterior setae. Penultimate segment with total of five distal setae, dorsal seta (alpha) claw like, other setae being very long. Terminal segment with four setae, most posterior one being transformed into a claw, and most anterior one being transformed into aesthetasc ya, which is twice as long as terminal segment.

A2 ( Figure 26D ): Exopod consisting of plate, one long and two short setae. First endopodal segment with one long, plumose, ventral seta, and five long swimming setae, and one short (most external one). Penultimate segment with two external setae and four internal “t” setae. Setae z1 transformed into a short claw, slightly longer than terminal segment, other z setae reaching 1/3 of terminal claws. Claws G1 and G3 subequally long. Claw G2 very half L of G1. GM claw reaching 2/3 of G1 and Gm being half L of GM.

Md ( Figure 30B ): First segment on the palp with two setae. Second segment externally with two setae, while internally with three long (plumose) setae, of which one clearly longer than other two; one smooth seta (as long as shorter plumose setae) and one thick, short plumose (beta seta). Penultimate segment with four setae extero-laterally, two setae distally, and two setae intero-distally. Terminal segment with three strong claws and two setae. None of the claws fused with segment. Terminal segment only two times longer than wide.

Mxl ( Fig 30A ): Palp positioned quite distant from endites. First segment of palp wide with five setae anteriorly and one thick seta posteriorly. Terminal segment with four claws and two setae. Terminal segment square shaped.

T1 ( Figure 28A ): Two short “a” setae and one long (plumose) seta on protopod. Exopod with 5 or 6 rays. Terminal setae on endopod very short and subequally long.

T2 ( Figure 28B ): Basal seta present. Seta “e” reaching middle of following segment, seta “f” reaching distal end of penultimate segment, while seta “g” very short. Seta h3 on terminal segment short. Terminal claw as long as three distal segments combined. T2 covered with long and dense pseudochaetae, setae “e” and “f” plumose.

T3 ( Fig 27D ): Basal segment with d2 seta. Setae “e” and “f” well developed, while “g” seta tiny. Terminal segment with setae h1 and h2 equally long ( Figure 25C ).

UR ( Figure 29C ): L ratios between anterior margin, anterior, and posterior claw equaling 2.7: 1.3: 1. Posterior seta very long and inserted quite low on posterior margin, posterior margin with short setae.

Male: Carapace same as female ( Figures. 25A, B , 26C, D ) except for the variability of some specimens not having such a well developed flange on RV ( Figure 27A ).

A2 ( Figure 27B ): Setae z1 and z2 transformed into claws, former one being shorter than latter, seta z3 normally developed. G2 long, while G1 and G3 reduced. Setae t2 and t3 transformed into sexual bristles and penultimate segment subdivided.

Prehensile palps ( Figures 25D , 27C , 28D ): Asymmetrical, right palp having a stronger finger and one terminal seta ( Figure 27C ). Both palps with very long trunks compared to fingers.

Hemipenis ( Figure 28C ): Two lobes present, both curved towards inner side, lobe “b” especially curved and with very thick point.

UR ( Figure 29A ): Same as in female.

Remarks and affinities. Physocypria bullata is very closely related to P. lenticularis ( Müller, 1898) and P. denticulata ( Daday, 1910) , all three species having a similar carapace appearance, i.e. RV dorsally overlapping LV with a flange. The main difference between the three species is the appearance of the hemipenis. In P. lenticularis both lobes are evenly rounded while in P. denticulata lobe “b” is much wider and lower in comparison with the lobe “a”. All other representatives of the genus have more or less symmetrical carapaces.

Figures

FIGURE 1. A, Cyclocypris washingtoniensis Dobbin, 1941, syntype (male, SMNH 335865); B, C, E, H, I, Cyclocypris sharpei Furtos, 1933, B, C, E Paratype (♂, SMNH 67879), H, I paratype (♂, SMNH 67920); D, F, G, C. cruciata Furtos, 1935 holotype (♂, SMNH 71416): A—left prehensile palp, B—T3, without basal segment, C—T2; D, E—UR, F—LV, interior view (valve broken), G—RV, interior view; H—LV, interior view; I—RV, interior view. Scales = 0.1 mm.

FIGURE 2. Cyclocypris pusilla Sars, 1895, type (NHMO F11355): A—carapace, dorsal view; B—carapace, exterior view from the left side (carapace slightly tilted); C—T2, D—UR; E—T3, withouth basal segment; F—hemipenis, outline only. Scales = 0.1 mm.

FIGURE 3. Distribution of the genus Cyclocypris Brady & Norman, 1889: 1—C. ampla Furtos, 1933; 2—C. brevisetosa Bronstein, 1928; 3—C. diebeli Absolon, 1978; 4—C. forbesi Sharpe, 1897; 5—C. globosa (Sars, 1863); 6—C. laevis (O.F. Müller, 1776); 7– C. mediosetosa Meisch, 1987; 8—C. modesta (Herrick, 1887); 9—C. nahcotta Dobbin, 1941; 10—C. ovum (Jurine, 1820); 11—C. pusilla Sars, 1895; 12—C. scrobiculata Klie, 1936; 13—C. serena (Koch, 1838); 14—C. sharpei Furtos, 1933; 15—C. vinyardi Külköylüoĝlu, 2008. Note: C. laevis and C. ovum are distributed in the entire Holarctic and the dotted line is only approximate distribution of the two species.

FIGURE 4. Cypria karamani Petkovski, 1976: SEM-image, dorso/lateral view.

FIGURE 5. A–D, Cypria maculata Hoff, 1942, A, C holotype (♀, SMNH 81083), B, D allotype (♂, SMNH 81084); E-F, C. palustera Furtos, 1935, paratype (♂, SMNH 71410); G-I, Cypria spinifera Tressler, 1937, type (♀, SMNH 71504): A—LV, interior view; B—UR of ♂; C—UR and genital field of ♀: D, E—hemipenis (arrow on E showing well sclerotized parts); F, G—T2; H—UR and genital field of ♀; I—RV, interior view. Scales = 0.1 mm.

FIGURE 25. SEM of Physocypria bullata Vávra, 1897, male (ZMH 1242): A—open carapace; B—posterior margin of RV from interior, showing the presence of the marginal tubercles; C—two last segments of T3; D—left prehensile palp.

FIGURE 26. Physocypria bullata Vávra, 1897. A, D—Type, ♀ (MNB 10011); B, C ♂ (ZMH 1242b): A—carapace, exterior view from left side; B—LV, interior view; C—carapace, exterior view from the right side; D—last two segments of A2. Scales = 0.1 mm.

FIGURE 27. Physocypria bullata Vávra, 1897. A—♂ (ZMH 1242c); B, C—♂ (ZMH 1242b); D—lectotype, ♀ (MNB 10011): A—carapace, exterior view from right side; B—A2; C—prehensile palp; D—T3. Scales = 0.1 mm.

FIGURE 28. Physocypria bullata Vávra, 1897. A—lectotype, ♀ (MNB 10011); B, C—♂ (ZMH 1242b): A—T1, B—T2; C— hemipenis; D—T1. Scales = 0.1 mm.

FIGURE 29. Physocypria bullata Vávra, 1897. A—♂ (ZMH 1242b); B, C, D—lectotype, ♀ (MNB 10011): A—UR; B—distal five segments of A1; C—UR; D—proximal two segments of A1. Scales = 0.1 mm.

FIGURE 30. Physocypria bullata Vávra, 1897. A, B—lectotype, ♀ (MNB 10011); A—Mxl; B—Md palp. Physocypria capensis Sars, 1895. C –♀ (ZMH 541), LV, interior view. Scales = 0.1 mm.