Caaporacandona, Pinto & Rocha & Martens, 2005, Pinto & Rocha & Martens, 2005

Pinto, R. L., Rocha, C. E. F. & Martens, K., 2005, On new terrestrial ostracods (Crustacea, Ostracoda) from Brazil, primarily from São Paulo State, Zoological Journal of the Linnean Society 145 (2), pp. 145-173 : 161-167

publication ID

https://doi.org/ 10.1111/j.1096-3642.2005.00185.x

persistent identifier

https://treatment.plazi.org/id/03E487A9-110D-6C37-FED6-CCB7653CD1F8

treatment provided by

Diego

scientific name

Caaporacandona
status

GEN. NOV.

CAAPORACANDONA   GEN. NOV.

Type species

C. shornikovi   sp. nov. (here designated)

Derivation of name

After the word caapora from the Tupi-Guarani indigenous language, meaning ‘little man in the forest’. Although the Caapora in general is not friendly to humans, we trust these ostracods to be fairly harmless.

Diagnosis

Cp narrow in dv, reniform in lv. A1 5-segmented, with segments 1 + 2 fused, segment 3 separate, segments 4 + 5 and 6 + 7 fused. Penultimate segment of A2 with 2 ventro-lateral setae and with claw G2 about half the size of G1. Md-palp with seta s2 small. Distal segment of T 3 with 1 apical claw and 2 setae. CR with proximal seta distally inserted, i.e. close to the proximal claw.

Additional generic features

Valves reniform, narrow in dv, LV overlapping RV anteriorly and posteriorly, RV overlapping LV ventrally. Calcified inner lamella narrow, fused zone with straight pore canals, c. 4 cms, large fulcral point, md scars small and elongated. Hinge adont.

Most appendages with reduction in number of segments and number and length of claws and setae. A2 with expodite consisting of 1 long seta, a short seta and a small, compact organ; natatory setae missing; penultimate segment with ventro-lateral setae, sometimes also with a dorso-lateral seta, with 3 apical claws, G1 and G3 long, G2 slightly longer than half their length. Md palp with reduced chaetotaxy, setae s2 very short, apical segment with 2 long claws and 2 small setae. Mx1-palp with 2 or 3 long apical setae on first segment, 3 setae on rectangular terminal segment. T 1-palp (female) with 3 apical setae. T 2 a slen- der walking leg, with both setae d1 and d2 missing, penultimate segment divided, apical claw long and slender. T 3 with 1 apical claw and 2 setae on terminal segment. CR stout, proximal seta long, distally inserted, i.e. close to proximal claw; 2 stout and serrated endclaws and distal seta present.

Differential diagnosis

Caaporacandona   gen. nov. can be distinguished from both Terrestricypris   and Terrestricandona   by the presence of 1 claw and 2 setae on the terminal segment of the T 3 (1 claw only in Terrestricypris   and Terrestricandona   ), by the absence of seta d1 on T 2 (d1 long in Terrestricypris   and Terrestricandona   ) and by the position of the proximal seta on the CR (distal in Caaporacandona   gen. nov., central in the other two genera); from Terrestricypris   by the presence of a (short) claw G2 on A2; from Terrestricandona   by the size of claw G2 on A2 and by reduced seta s2 on the Md-palp.

CAAPORACANDONA SHORNIKOVI   SP. NOV.

( FIGS 10–12 View Figure 10 View Figure 11 View Figure 12 )

Type locality

Boracéia Biological Station , Municipality of Salesópolis , São Paulo State, Brazil. GPS coordinates: 23°38′16.9″S, 45°50′24.5″W. Inside the forest, near Pedreira’s swamp, in leaf litter at the foot of a rock wall. Material collected on 02.iv.2003 by CEFR and RLP. The species is thus far known only from its type locality GoogleMaps   .

Type material

Holotype: a dissected female, with valves stored dry in a micropalaeontological slide and dissected soft parts kept in a sealed slide (MZUSP 16370).

Paratypes: 3 females, dissected and stored like the holotype ( MZUSP 16371–73 View Materials ); a dissected female, with valves used for SEM and stored in micropalaeontological slide, and dissected soft parts kept in a sealed slide ( MZUSP 16374 View Materials ); 2 carapaces used for SEM and stored in micropalaeontological slides ( MZUSP 16375 View Materials , 16376 View Materials )   , 65 females kept in toto in ETOH ( MZUSP 16377 View Materials )   .

Derivation of name

Named after Professor Evgeni Shornikov (Vladivostok, Russia), in recognition of his significant contribution to ostracod taxonomy and ecology in general, and to terrestrial ostracods in particular.

Diagnosis

Third segment of A1 with long dorso-apical seta; segment 4 + 5 (third segment) with dorso-apical seta extending beyond tip of terminal segment. Penultimate segment of A2 with 1 dorso-lateral seta.

Description

Cp ( Fig. 12G View Figure 12 ) reniform, slightly convex, narrow in dv, LV overlapping RV along the anterior, posteriorly and ventral margins. Cp in dorsal and ventral views ( Fig. 12D, E View Figure 12 ) elongate, with pointed extremities and nearly straight, parallel sides over most of the length, greatest width situated in the middle. Calcified inner lamella narrow on both anterior and posterior sides, both valves with well-developed inner list along (but not on) the inner margin. RV and LV ( Fig. 12A–C, F View Figure 12 ) subequal, with narrowly rounded anterior margin, slightly ventrally produced, rounded dorsal margin, more broadly rounded in the posterior part, caudal margin more broadly rounded than anterior one and ventral margin sinuous. Fused zone more developed anteriorly, with straight pore canals, 4 cms, large fulcral point, mandibular scars small and elongated. Hinge adont.

Most appendages with reduction in number of segments and number and length of claws and setae. A1 ( Fig. 10A View Figure 10 ) 5-segmented; first segment (S1 + S2) with 1 dorsal seta and 2 ventral setae; second segment (S3) with 1 long dorso-apical seta; third segment (S4 + S5) with dorso-apical seta reaching beyond tip of terminal segment; fourth segment (6 + 7) with 1 long and 1 shorter dorso-apical setae, terminal segment (S8) with 3 apical setae (1 long, 1 half as long, 1 very short) and 1 lateral aesthetasc, the latter about twice as long as the segment.

A2 ( Fig. 10B View Figure 10 ) with exopodite consisting of 1 long seta, 1 short seta and a small and short, compact organ; first endopodal segment with 2 unequal ventroapical setae and a Y-aesthetasc of normal length, natatory setae fully absent; penultimate segment of endopode dorsally with 1 lateral seta and ventrally 2 long subapical setae of unequal size and 1 short apical seta, with 1 short z-seta, 2 long claws (here homologized with G1 and G3) and 1 short claw (G2); terminal segment with claw GM large and claw Gm half as long, aesthetasc y3 basally fused with slightly longer accompanying seta.

Md palp ( Fig. 10C, D View Figure 10 ) with reduced chaetotaxy: first palp-segment with respiratory plate well developed, with at least 4 rays; ventrally with seta s2 very short, s1 well developed, accompanying seta longer and smooth, alpha-seta small and slender; second palp segment with 2 long seta, 1 of intermediate length and 1 short and slender beta-seta; third segment with 1 medio-dorsal setae, 3 ventro-apical setae and 1 medioapical gamma seta; terminal segment with 2 hirsute claws and 2 short setae.

Mx1-palp ( Fig. 10E View Figure 10 ) with 2 long apical setae on first segment, 3 setae on rectangular terminal segment.

T1-palp ( Fig. 11A View Figure 11 ) with 3 apical setae, respiratory plate reduced; endite with about 9 unequal setae, setae a, b and d long and stout.

T2 ( Fig. 11B View Figure 11 ) a walking leg, setae d1 and d2 missing, penultimate segment divided and with 2 unequal ventro-apical setae; terminal segment rectangular, with apical claw long and slender and with 1 apical and 1 subapical seta.

T3 ( Fig. 11C View Figure 11 ) with 1 seta on basipodite; segments 1 and 2 + 3 devoid of setae; terminal segment (4) with 1 apical claw and 2 (sub)apical setae.

CR ( Fig. 11D View Figure 11 ) stout, proximal seta long, distally inserted, i.e. close to proximal claw; with 2 stout and serrated endclaws and a distal seta of intermediate length.

End of body ( Fig. 11E View Figure 11 ) a slender seta.

Male unknown.

Measurements (in µ m)

MZUSP 16375: L = 373, H = 172.

MZUSP 16376: L = 371, W = 124.

MZUSP 16374: LV: L = 378, H = 178; RV: L = 375, H = 180

CAAPORACANDONA IGUASSUENSIS   SP. NOV.

( FIGS 13 View Figure 13 , 14 View Figure 14 )

Type locality

Parque Nacional do Iguaçu , Municipality of Foz do Iguaçu , Paraná State, Brazil. Approximate GPS coordinates: 25°33′S 54°31′W. Inside the forest, in moist moss. Material collected on 28.xii.2000 by CEFR. The species is thus far known only from its type locality GoogleMaps   .

Type material

Holotype: a dissected female, with valves stored dry in a micropalaeontological slide and dissected soft parts kept in a sealed slide (MZUSP 16378).

Paratypes: 4 females, dissected and stored like the holotype ( MZUSP 16379–82 View Materials )   ; 18 females kept in toto in ETOH ( MZUSP 16383 View Materials )   .

Derivation of name

Named after its type locality. Iguaçu, also spelled iguassu, means large (guassu) river (i) in the tupiguarani indigenous language. We opted for spelling C. iguassuensis   (with double ‘s’, instead of ‘c’) because of its more accurate pronunciation. In addition, this alternative spelling (iguassu) exists in the literature concerning tupi-guarani language, even though it is not the official name of the locality.

Diagnosis

Second segment (S3) of A1 without long dorso-apical seta; third segment (S4 + S5) with dorso-apical seta not reaching tip of terminal segment. Penultimate segment of A2 without dorso-lateral seta.

Description

Cp reniform, slightly convex, narrow in dorsal view, LV overlapping RV along the anterior, posterior and ventral margins. Cp in dorsal and ventral views elongate, with pointed extremities and nearly straight, parallel sides over most of the length, greatest width situated in the middle. Calcified inner lamella narrow on both anterior and posterior sides, both valves with well-developed inner list along (but not on) the inner margin. RV and LV ( Fig. 13A, B View Figure 13 ) subequal, with narrowly rounded anterior margin, slightly ventrally produced, rounded dorsal margin, more broadly rounded in the posterior part, caudal margin more broadly rounded than anterior one and ventral margin sinuous. Fused zone more developed anteriorly, with straight pore canals, 4 central muscle scars, large fulcral point, mandibular scars small and elongated. Hinge adont.

Most appendages with reduction in number of segments and number and length of claws and setae. A1 ( Fig. 13C View Figure 13 ) 5-segmented; first segment (1 + 2) with 1 dorsal seta and 2 ventral setae; second segment (S3) without any setae, third segment (S4 + S5) with dorsoapical seta not reaching tip of terminal segment; fourth segment (S6 + S7) with 1 long and 1 shorter dorso-apical setae, terminal segment (S8) with 3 apical setae (1 long, 1 half as long, 1 very short) and 1 lateral aesthetasc, the latter about twice as long as the segment.

A2 ( Fig. 13D View Figure 13 ) with exopodite consisting of 1 long seta, 1 short seta and small and short, compact organ; first endopodal segment with 2 unequal ventro-apical setae and Y-aesthetasc of normal length, natatory setae fully absent; penultimate segment of endopode without dorso-apical setae, but with 2 ventro-apical seta, 2 short z-setae, 2 long claws (here homologized with G1 and G3) and 1 short claw (G2); terminal segment with claw GM large and Gm half as long, aesthetasc y3 basally fused with slightly longer accompanying seta.

Md palp ( Fig. 13E, F View Figure 13 ) with reduced chaetotaxy: first palp-segment with respiratory plate well developed, with at least 4 rays; ventrally with seta s2 very small, s1 well developed, accompanying seta longer and smooth, alpha-seta small and slender; second palp segment with 2 long seta, 2 of intermediate length and 1 short and slender beta-seta; third segment with 2 medio-dorsal setae, 3 ventro-apical setae and 1 medioapical gamma seta; terminal segment with 2 hirsute claws and 2 short setae.

Mx1-palp ( Fig. 13G View Figure 13 ) with 3 long apical setae on first segment, 3 setae on rectangular terminal segment.

T1-palp ( Fig. 14A View Figure 14 ) with 3 apical setae, respiratory plate reduced; endite with about 8 unequal setae, setae a, b and d long and stout.

T2 ( Fig. 14B View Figure 14 ) a walking leg, setae d1 and d2 missing, penultimate segment divided and with 2 unequal ventro-apical setae; terminal segment rectangular, with apical claw long and slender and with 1 apical and 1 subapical seta.

T3 ( Fig. 14C View Figure 14 ) with 1 seta on basipodite; segments 1 and 2 + 3 devoid of setae; terminal segment (4) with 1 apical claw and 2 (sub)apical setae.

CR ( Fig. 14D View Figure 14 ) stout, proximal seta long, distally inserted, i.e. close to proximal claw; with 2 stout and serrated endclaws and a distal seta of intermediate length.

End of body ( Fig. 14E View Figure 14 ) a slender seta.

Male unknown.

Measurements (approximate values, in µ m)

MZUSP 16378: L = 330, H = 150 for both valves.

Remark: due to decalcification of the material, no SEM illustrations are available.

T

Tavera, Department of Geology and Geophysics

RV

Collection of Leptospira Strains