dcsimg

Comprehensive Description

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Rutiderma sterreri Kornicker, 1981

Rutiderma sterreri Kornicker, 1981a:5, figs. 3–5; 1983:70, figs. 41–43.—Maddocks and Kornicker, 1986:282, fig. 90 [part].

HOLOTYPE.—USNM 158115, ovigerous female on slide and in alcohol.

TYPE LOCALITY.—Station 630820, Harrington Sound, Bermuda.

MATERIAL.—Bermuda: Cherry Pit Cave, 22 Mar 1987: USNM 193399, 1 adult female in alcohol. Cripplegate Cave, 21 Oct 1981: USNM 193368, 1 adult male in alcohol. Harrington Sound, 1980–1981: USNM 193400, 3 adult males plus 4 adult females in alcohol.

DISTRIBUTION.—Bermuda: Cherry Pit Cave, 22 Mar 1987; Cripplegate Cave, 21 Oct 1981; Harrington Sound (open water), 1980–1981. Previously reported from Hamilton Harbor, Spanish Point, Castle Harbor, and Harrington Sound (Kornicker, 1981a: 1, 2).

SUPPLEMENTARY DESCRIPTION OF ADULT MALE, USNM 193368 (Figure 26).—Carapace elongate with strong lateral ribs terminating posteriorly in connecting vertical rib with concavity at midheight and weaker ribs along dorsal and ventral margins (Figure 26a). Surface with small fossae (Figure 26a). Central adductor muscle attachments comprising about 12 ovoid scars forming group and 1 additional scar dorsal to group (Figure 26b).

Carapace Size: Length 1.00 mm, height 0.58 mm.

Second Antenna (Figure 26c,d): Major sclerites of the protopodite viewed medially are stippled in illustration (only 1st joint of endopodite shown in illustration)(Figure 26c). Posterior margin of protopodite bears notch near upper end to acommodate lateral eye, and shallow indentation at midheight to accomodate central adductor muscles (similar morphology was noted by Kornicker (1985:24) on R. hartmanni Poulsen, 1965).

Furca, Copulatory Organ, Posterior of Body with Sclerites: Illustrated in Figure 26e.

Bellonci Organ, Lateral Eye, Upper Lip, Anterior of Body, Heart: Illustrated in Figure 26f.

COMPOSITION.—The Cylindroleberidoidea comprise the family Cylindroleberididae Müller, 1906.

COMPOSITION.—This family comprises 3 subfamilies of which only 1, the Cylindroleberidinae, is represented in collections from Bermuda.

Two species in 2 genera in this subfamily have been reported previously from Bermuda (Kornicker, 1981a:2): Parasterope muelleri (Skogsberg, 1920:483) and Bruuniella species A (Kornicker, 1981a:12), but none have been reported previously from caves.

Parasterope Kornicker, 1975

TYPE SPECIES.—Asterope Mülleri Skogsberg (1920:483); subsequent designation by Kornicker (1975:401).

Three specimens of P. muelleri were collected in Bermudan caves.
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Kornicker, Louis S. and Iliffe, Thomas M. 1989. "Ostracoda (Myodocopina, Cladocopina, Halocypridina) from Anchialine Caves in Bermuda." Smithsonian Contributions to Zoology. 1-88. https://doi.org/10.5479/si.00810282.475

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Rutiderma sterreri Kornicker, 1981

Rutiderma sterreri Kornicker, 1981b:5, figs. 3–5.

HOLOTYPE.—USNM 158115, ovigerous female on slide and in alcohol.

TYPE-LOCALITY.—Station 630820, Harrington Sound, Bermuda.

MATERIAL.—Bermuda: Holotype; paratypes: USNM 106459, 5 ovigerous females and 1 juvenile. USNM 158573, 1 adult male (new material), sta Knot=B1.

DISTRIBUTION.—Bermuda, intertidal to 11 m (Table 1).

DIAGNOSIS OF ADULT FEMALE.—Carapace similar to that of female R. dinochelatum but with additional ribs paralleling ventral margin (compare Figures 10 and 41). Appendages similar to those of R. dinochelatum, except tip of bellonci organ of some specimens of R. dinochelatum are pointed, whereas tip of organ is rounded on R. sterreri.

DESCRIPTION OF ADULT MALE (Figures 42, 43).—Carapace elongate with prominent rostrum and caudal process.

Ornamentation (Figure 42): Each valve with rib along dorsal and ventral margins in addition to 2 stronger midribs (1 above and 1 below valve middle); upper midrib with process at posterior end; vertical rib connecting upper and lower midribs slightly broader near ventral end; rostrum deeper than that of female; anterodorsal and ventral radial riblets present on female carapace absent on adult male; surface with shallow fossae; each valve orange-red in strip paralleling dorsal margin and in posterodorsal region (Figure 43); color fades after several months in glycerine or alcohol.

Infold (Figure 43a,b): Rostral infold with 8 bristles forming row parallel to anterior margin (Figure 43a); 2 minute bristles at inner end of incisur; antroventral and posteroventral infolds similar to that of female; infold of caudal process similar to that of female except outer edge of list fairly linear (Figure 43b), not slightly convex as that of female (Kornicker, 1981, fig. 5).

Size: USNM 158573, left valve under cover slip, length 0.95 mm, height 0.57 mm.

First Antenna (Figure 43c): 1st joint with few spines forming rows on medial side. 2nd joint spinous, with 2 bristles (1 dorsal, 1 lateral). 3rd joint about one-half length of 4th joint on medial side and about same length on lateral side; medial suture separating 3rd and 4th joints well defined and more-or-less perpendicular to edges of limb; lateral suture weak and forming angle with limb edges resulting in 3rd joint with short ventral edge and longer dorsal edge; 3rd joint with 3 bristles (1 ventral, 2 dorsal); 4th joint with 4 bristles (3 ventral, 1 dorsal). 5th joint small, wedged ventrally and medially between 4th and 6th joints; sensory bristle with short, stout, proximal part with abundant distal filaments (not all shown on illustrated limb), and distal stem with minute spine at tip. Elongate 6th joint with spinous medial bristle at distal dorsal corner. 7th joint: spinous a-bristle about same length as bristle of 6th joint; b-bristle more than twice length of a-bristle, stout with 2 filaments near middle (tip of filaments and tip of stem with minute bent spine); c-bristle extremely long (broken on both limbs of specimen examined, but with 9 filaments on remaining part; filaments with 2 minute spines at tip). 8th joint: d- and e-bristles bare with blunt tips, slightly longer than b-bristle; f-bristle similar to c-bristle; g-bristle longer than b-bristle, with 1 proximal filament (tip of filament and tip of bristle with minute spine).

Second Antenna (Figure 43d): Protopodite without spines but may have minute unringed distal medial bristle (pore present but bristle not observed with certainty). Endopodite 3-jointed: 1st joint short with 5 bristles (4 proximal, 1 near middle); 2nd joint elongate with 2 bristles near middle; 3rd joint elongate, reflexed, with 1 short proximal bristle and 2 small bristles near rounded tip (tip with faint ridges). Exopodite: 1st joint elongate with minute, terminal, medial bristle, and distal hairs along ventral margin; 2nd joint short, with bristle having same length as combined length of joints 3 and 4, with minute ventral spines; 3rd joint elongate with undulating ventral margin and long natatory bristle without spines; joints 4–9 short, decreasing in size distally along limb; joints 4–8 each with long bristle with natatory hairs; 9th joint with 5 bristles (3 long and 1 medium (all with natatory hairs), and 1 minute, bare, in medial distal corner); joint 2 with long lateral spines on distal margin; joints 3–8 with short lateral spines on distal margin.

Mandible (Figure 43e): Coxale endite represented by 2 small spines. Basale: medial side spinous, with 5 bristles near ventral margin; dorsal margin with 3 bristles (1 short near middle, and 1 long and 1 short distal to middle). Exopodite well developed, hirsute distally. 1st endopodial joint with medial spines and 2 ventral bristles. 2nd endopodial joint: medial side with long spines; dorsal margin with 3 proximal bristles; ventral margin with 6 short distal bristles. End joint with 1 stout claw and 4 slender bristles.

Maxilla (Figure 43f): Limb reduced. Endites I–III with faint, weakly developed bristles (not all shown on illustrated limb). Precoxale and coxale with dorsal fringe of long hairs; coxale with stout hirsute dorsal bristle. Basale with short dorsal bristle, ventral bristles obscure on specimen examined. Exopodite obscure but with 1 long spinous bristle and 1 or 2 shorter bristles. Endopodite: 1st joint with 1 short alpha-bristle and 1 short beta-bristle; end joint with about 7 weakly developed bristles.

Fifth Limb Figure 43g): Endite I with 3 short bristles; endite II with 4 faint bristles; endite III with 7 bristles (not all shown on illustrated limb). Exopodite: joints 1 and 2 each with about 4 bristles, some unringed, flattened; joint 3 with stout hirsute bristles on outer lobe and 2 or 3 bristles on inner lobe; remaining joints fused, with total of 4 bristles.

Sixth Limb (Figure 43h): 2 short bristles in place of epipodial appendage. Endite I with 3 short bristles; endite II with 2 bristles (1 long, 1 short); endite III with 3 bristles (2 long, 1 short); endite IV with 3 long bristles. End joint with 3 spinous bristles (one of these with long proximal hairs) on anterior projection followed by 4 stout hirsute bristles.

Seventh Limb (Figure 43i): 4 proximal bristles, 2 on each side, and 4 longer terminal bristles, 2 on each side; proximal bristles with 1 or 2 bells; terminal bristles with 4 bells; some bristles with distal marginal spines. Terminus with opposing combs having about 2 or 3 teeth.

Furca (Figure 43j): Each lamella of furca with 4 primary claws followed by 2 secondary claws; spines along posterior margins of claws 1 and 2 of equal length; long hairs medially at base of primary claws; claw 1 of right lamella anterior to claw 1 of left lamella.

Bellonci Organ (Figure 43k): Elongate with 2 sutures in middle part, and with rounded tip.

Eyes (Figure 43k): Medial eye with dark brown pigment; lateral eye well developed, larger than medial eye, with black pigment and numerous ommatidia (about 19).

Body: Without orange-red pigment present in valves.

Upper Lip (Figure 43k): Rounded.

Genitalia: (Figure 43j): Copulatory limbs well developed, with sclerotized process at tip.
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bibliographic citation
Kornicker, Louis S. 1983. "Rutidermatidae of the Continental Shelf of Southeastern North America and the Gulf of Mexico (Ostracoda: Myodocopina)." Smithsonian Contributions to Zoology. 1-89. https://doi.org/10.5479/si.00810282.371

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Rutiderma sterreri Kornicker, 1981

Rutiderma sterreri Kornicker, 1981b:1, 2, 5–8, figs. 3–5 [female holotype: USNM; type-locality: “Harrington Sound, Bermuda…about 11 m”]; 1983:11–13, 25, 70–73, figs. 41–43.—Maddocks and Kornicker, 1986:282, pl. 90 [part].

DISTRIBUTION.—Northwest Atlantic: Bermuda.

HABITAT.—Benthic; intertidal–11 m; algae, grasses, oysters, shells, mud with grass, mud, coarse sand with Thalassia and Halimeda overlying mud, red sponge and algae, sand/ mud under rocks.

LIFE HISTORY AND ONTOGENY.—Female, male, 4 eggs.

PARASITES.—Choniostomatid copepod (Kornicker, 1981:8).

Rutiderma tridens Kornicker and Caraion, 1978

Rutiderma tridens Kornicker and Caraion, 1978:3–5, 54, 60–66, 107, 108, figs. 52–55, pls. 32, 33 [A–1 juvenile male holotype, USNM; type-locality: “Station X051…21°48′01″N, 17°02′00″W; 30 m;…Spanish Sahara”].—Kornicker, 1981a:67.

[?]Rutiderma compressa.—Müller, 1908:53, 92, 93, pl. 7: figs. 1–13 [questionably referred to R. tridens by Kornicker and Caraion, 1978:60, 65: “The carapace of R. tridens resembles that of the female of R. compressa from South Africa illustrated by Müller (1908, pl. 7:1). Müller's specimen has been put into synonymy of R. tridens with a question, because the 1st antenna illustrated by Müller (1908, pl. 7:2) does not show a lateral bristle on the 2nd joint, but this could be because the illustration is a medial view of the limb. The 1st, 3rd, and 4th endites of the 6th limb illustrated by Müller (1908, pl. 7:12) have a different number of bristles than do the same endites of the two specimens of R. tridens described herein, but this could be the result of intraspecific variability.”].—Müller, 1912:35.—Hartmann, 1966:183, 201, fig. 115b [after Müller], [Not Brady and Norman, 1896]

DISTRIBUTION.—Northeast Atlantic: off Spanish Sahara. [?]Southeast Atlantic: South Africa.

HABITAT.—Benthic; 30 m; sand.

LIFE HISTORY AND ONTOGENY.—A–1 male.

Species in Open Nomenclature
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bibliographic citation
Cohen, Anne C. and Kornicker, Louis S. 1987. "Catalog of the Rutidermatidae (Crustacea: Ostracoda)." Smithsonian Contributions to Zoology. 1-11. https://doi.org/10.5479/si.00810282.449

Comprehensive Description

provided by Smithsonian Contributions to Zoology
Rutiderma sterreri

ETYMOLOGY.—The species is named after Dr. Wolfgang Sterrer, director of the Bermuda Biological Station.

HOLOTYPE.—USNM 158115, ovigerous female on slide and in alcohol.

TYPE-LOCALITY.—Station 630820, Harrington Sound, Bermuda.

PARATYPES.—USNM 106459, 5 ovigerous females and 1 juvenile; USNM 158283, 1 ovigerous female; USNM 158284, 2 juveniles; USNM 158285, 1 A-1 male; USNM 158286, 1 juvenile with choniostomatid copepod parasite; USNM 158287, 2 juveniles; USNM 158288, 1 juvenile.

DESCRIPTION OF ADULT FEMALE (Figures 3–5).—Well-defined incisur forming right angle with rostrum (Figures 3, 4a); well-developed triangular caudal process (Figures 3, 4b,d, 5a,b).

Ornamentation (Figures 3, 4b-d, 5a,b): Carapace ornate and rugose with 2 horizontal ribs terminating in large posterior processes connected by vertical rib (Figure 3); additional rib present just within anterodorsal margin and connected to both valve edge and upper horizontal rib by radiating riblets; additional less well-defined ribs present along ventral margin interconnected by radiating riblets; distinct rib extending from rostrum to anteroventral valve margin and extending only slightly past end of valve; anterior edge of rostrum and ventral margin of valve with minute processes forming scalloped appearance; middle of posterior edge of left valve with small process (Figures 4d, 5a) absent on right valve; surface of valve with numerous small fossae (Figure 3); bristles present along anterior and ventral margins of valves and sparsely distributed over lateral surfaces; 2 lateral bristles on posterior edge of caudal process (Figures 4b-d, 5a,b).

Infold (Figures 4a,b,d, 5a,b): Rostral infold with 6–8 bristles forming row parallel to anterior margin (Figure 4a); 2 minute bristles at inner end of incisur; anteroventral infold with 8 bristles forming row, and 7 or 8 ridges paralleling inner edge of infold; posterior end of ventral infold near caudal process with about 10 small bristles forming irregular row; anterior part of caudal process with slightly curved list having 2 small bristles at or near lower end and 1 at or near upper end; 1 small bristle present dorsal to end of list of both valves (Figures 4b,d, 5a,b).

Selvage: Broad lamellar prolongation with marginal fringe present along anterior and ventral valve margins; narrower bare prolongation along margin of caudal process; lamellar prolongation divided at inner end of incisur and at tip of caudal process on either side of minute bristle (Figure 4c).

Size: USNM 158115, length 1.10 mm, height 0.73 mm. USNM 106459 (5 ovigerous females): length 0.98 mm, height 0.71 mm, length 0.99 mm, height 0.74 mm, length 0.99 mm, height 0.71 mm, length 0.99 mm, height 0.72 mm, length 1.02 mm, height 0.74 mm. USNM 158283, length 0.94 mm, height 0.73 mm.

First Antenna (Figure 4e): 1st joint with few small lateral spines forming rows. 2nd joint with few spines and 2 bristles (1 dorsal, 1 lateral). 3rd and 4th joints fused; small 3rd joint with 2 or 3 bristles (1 ventral, 1 or 2 dorsal); long 4th joint with 3 bristles (2 ventral, 1 dorsal). Sensory bristle of long 5th joint with 1 minute proximal filament and spine at tip. Minute 6th joint with short spinous medial bristle. 7th joint: a-bristle spinous, slightly longer than bristle of 6th joint; b-bristle about one-third longer than a-bristle, bare except for spine at tip; c-bristle about same length as sensory bristle of 5th joint, with 1 minute proximal filament and spine at tip. 8th joint: d- and e- bristles well developed, with blunt tips; f-bristle stout, about twice length of b-bristle, with minute proximal filament and spine at tip; g-bristle longer than f-bristle, with 1 proximal filament with slender tip.

Second Antenna (Figure 4f): Protopodite bare. Endopodite single jointed with 4 short anterior bristles. Exopodite: elongate 1st joint with minute medial bristle on distal margin; bristles of joints 2–5 relatively short, ventral margins with pointed proximal spines followed by row of blunt teeth; bristles of joints 6–8 with long bristles with natatory hairs but no spines; 9th joint with 5 bristles (3 long with natatory hairs, 1 short bare or with natatory hairs, 1 minute bare); bristles 2–8 with minute spines forming rows near distal margins.

Mandible (Figure 4g): Coxale endite bifurcate, pectinate. Basale: dorsal margin with 1 short bristle near middle and 2 more distally (longer of these more than twice length of other); ventral margin with 4 proximal bristles (2 short pectinate, 2 slender, ringed), and 2 or 3 short distal bristles. 1st endopodial joint with 2 short ventral bristles and numerous medial spines forming rows. 2nd endopodial joint: dorsal margin with 3 short proximal bristles; ventral margin with 2 small distal bristles; terminal claw with proximal dorsal tooth and tip forming right angle; small sclerotized process with minute terminal spine or bristle present at medial side of base of terminal claw; medial surface of joint with numerous spines forming rows. 3rd endopodial joint with 3 slender medial bristles, 2 slender lateral bristles, 1 long unringed spinous bristle just ventral to terminal claw, and terminal claw with truncate distal end.

Maxilla (Figure 4h): Endites I and II with 2 stout pectinate bristles and 3 slender ringed bristles; endite III with 3 stout pectinate bristles and about 3 slender bristles (not all shown on illustrated limb). Precoxale and coxale with fringe of hairs along dorsal margin; coxale with spinous dorsal bristle. Basale with 1 spinous bristle near dorsal margin. Endopodite: 1st joint with 1 medial bristle near basale, 1 spinous alpha-bristle, 1 spinous beta-bristle, and few spines forming row near dorsal margin; 2nd joint with 2 stout pectinate claws, and 5 slender, ringed, spinous bristles. Exopodite obscure on limb examined.

Fifth Limb (Figure 4i-l): Endite I with 3 bristles; endite II with 5 bristles; endite III with about 6 bristles (Figure 4j). Exopodite: main tooth of 1st joint consisting of 3 stout pectinate teeth followed by proximal smaller smooth tooth and ringed bristle (Figure 4k); outer edge of joint with 1 bristle proximal to distal tooth; inner edge of large flat tooth of 2nd joint with 3 stout lobes (largest of these with 2 secondary teeth on inner margin, other lobes smooth, Figure 4l); posterior side of tooth with minute bristle at outer distal corner, and 2 slender bristles near base of proximal lobe; 1 bristle present on inner edge of tooth proximal to proximal lobe; inner lobe of 3rd joint with 3 bristles (1 much smaller than others), outer lobe with 2 spinous bristles; 4th and 5th joints fused, with total of 4 spinous bristles.

Sixth Limb (Figure 4m): Endite I with 2 or 3 bristles; endite II with 2 bristles; endites III and IV each with 3 bristles. End joint with 3 spinous bristles on projecting process followed by 4 hirsute bristles (anterior 2 of these with small marginal spines near tip). 2 bristles present in place of epipodial appendage.

Seventh Limb (Figure 4n): Each limb with 6 bristles in distal group, 3 on each side, and 4 in proximal group, 2 on each side; each bristle with distal marginal spines and up to 5 bells. Terminus with comb of about 5 alate teeth opposite comb with about 3 teeth, some with spines.

Furca (Figures 4o, 5c): Each lamella with 4 strong claws followed by 2 weak secondary claws; secondary claws placed laterally just dorsal to edge of each lamella; claws bearing teeth along posterior margins; hairs present medially near bases of stout claws and following claws.

Bellonci Organ (Figure 4p,q): Elongate, widening near middle, then tapering distally, but widening slightly before terminating in rounded tip; minute hairs visible distally under oil immersion (Figure 4q).

Eyes (Figure 4p): Medial eye tapering distally, with brown pigment; lateral eye small but distinct, with brown pigment and 4 ommatidia.

Upper Lip (Figure 4p): Consisting of simple lobe.

Y-Sclerite (Figure 4o): Typical for genus.

Posterior of Body (Figure 4o): Hirsute.

Eggs: USNM 158115 and 158283 each with 4 eggs in marsupium.

Parasites: USNM 158286, 1 juvenile with choniostomatid copepod within posterior end of carapace (ostracode left intact).

COMPARISONS.—The new species Rutiderma sterreri differs from R. dinochelatum Kornicker, 1958, in that the tip of the bellonci organ is rounded, not pointed. The lengths of the 3 specimens of R. dinochelatum listed by Kornicker (1958:237) ranged from 1.14 to 1.22 mm (average 1.18 mm). The lengths of 7 ovigerous females of R. sterreri measured herein ranged from 0.94 mm to 1.10 mm (average 1.00 mm). A closer comparison of the 2 species will require a better description of R. dinochelatum, on which I am presently working.

CYLINDROLEBERIDIDAE Müller, 1906

CYLINDROLEBERIDINAE Müller, 1906

Parasterope Poulsen, 1965
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bibliographic citation
Kornicker, Louis S. 1981. "Benthic Marine Cypridinoidea from Bermuda (Ostracoda)." Smithsonian Contributions to Zoology. 1-15. https://doi.org/10.5479/si.00810282.331