Chelicopia triplex Kornicker 1994

“Chelicopia triplex, new species

Figures 90, 91

ETYMOLOGY.—From the Latin triplex (threefold).

HOLOTYPE.—Undissected adult female in alcohol in collection of the Museum of Victoria.

TYPE LOCALITY.—Slope 1, 34°59.52'S, 151°5.94'E, New South Wales, off Nowra; depth 204 m.

PARATYPES.—Slope 1: USNM 193935, adult female on slide and in alcohol; 5 unopened adult females in alcohol (7th limb with cylindrical bristles (visible through shell) indicating specimens are adults).

DISTRIBUTION.—Slope 1,204 m.

DESCRIPTION OF ADULT FEMALE.— Carapace round in lateral view, without incisur; carapace in dorsal view broader in posterior half. Posterior edge of caudal process slightly concave, but concavity not reflected in convex outline of valve which extends past concavity.

Ornamentation: Surface with abundant short bristles with digitate (serrate) tips. Longer bristles, most with rounded tips, present in vicinity of posterior edge of caudal process. Long slender bristles stouter in proximal half and with pointed tips sparsely distributed along valve edges, especially along anterior and ventral edges. Slender bristles, some with broad triangular base, sparsely distributed on outer surface and near edges, more abundant in vicinity of posterior edge of caudal process; a few bristles with short broad part near tip; concave edge of caudal process with 1 or 2 straight pointed bristles on ventral and dorsal ends. Surface without gel-like coating.

Infold: Anterior infold with 1 small bristle ventral to midheight of valve. Infold of caudal process with row of 5 or 6 bristles along narrow list and several slenderer bristles along inner margin of infold. Posterior infold with 2 setal bristles dorsal to caudal process.

Selvage: Broad continuous lamellar prolongation along anterior, ventral and posterior margins of valve; long fringe of hairs observed on edge of prolongation along anterior margin of left valve of USNM 193935 but not on right.

Carapace Size (length, height in mm): Slope 1: holotype, 0.86,0.73; USNM 193935, 0.87,0.78; 5 specimens: 0.86,0.73; 0.84, 0.71; 0.78, 0.72; 0.81, 0.77; 0.81, 0.69. Length range 0.78-0.87.

First Antenna: 1 st joint bare. 2nd joint with 1 dorsal bristle with long hairs. 3rd and 4th joints fused; 3rd joint with 2 equilength bare bristles (1 dorsal, 1 ventral); 4th joint with 2 bristles (1 short dorsal with few indistinct short spines, 1 long spinous ventral). 5th joint with long ventral bristle with 1 minute filament. Medial bristle of 6th joint short with few indistinct spines. 7th joint: a-bristle about 3 times length of bristle of 6th joint with few indistinct spines; b-bristle about twice length of a-bristle, bare except for terminal spine; c-bristle longer than bristle of 5th joint, with 2 small proximal filaments and 1 minute spine-like distal filament. 8th joint: d-and e-bristles very slightly shorter than bristle of 5th joint, bare with blunt tips; f-bristle about same length as e-bristle, with 2 small proximal filaments and 1 minute spine-like distal filament; g-bristle about same length as bristle of 5th joint, with 2 small proximal filaments and 1 minute spine-like distal filament.

Second Antenna: Protopodite bare. Endopodite 1-jointed with 1 proximal bristle and very low terminal bulge. Exopodite: 1st joint with small bent medial terminal bristle; bristle of 2nd joint long with 21 slender proximal ventral spines and distal natatory hairs; bristles of joints 3-8 long with proximal ventral spines and distal natatory hairs; 9th joint with 2 bristles (ventral long with proximal ventral spines and distal natatory hairs; dorsal short with small hairs); joints 2-7 with row of minute spines along distal margins.

Mandible: Coxale with ventral spines and endite represented by stout spine (not shown). Basale with 4 short ventral bristles, 1 lateral bristles at joint midheight, and 1 distal dorsal bristle. Exopodite represented by slender spine. 1st endopodial joint: medial surface with few distal spines, row of spines along dorsal 1/3 of distal margin, and 2 spine-like bristles at base of stout ventral claw; lateral surface with spines along dorsal half of distal margin. 2nd endopodial joint with 2 distal spine-like dorsal bristles, lateral spines near base of 3rd endopodial joint, and stout ventral claw. 3rd endopodial joint with 2 small spine-like bristles (1 ventral, 1 dorsal) at base of stout terminal claw.

Maxilla: Protopodite with single spinous dorsal bristle, fringe of dorsal hairs, and diaphanous thumb like process (latter observed on only 1 limb). Endite I with 6 bristles; endite II with 4 bristles; endite III with 6 bristles. Basale with short bristle near base of exopodite. Exopodite with 2 bristles. 1st and 2nd endopodial joints typical.

Fifth Limb: Single endite with 1 small bristle. 1st exopodial joint with 2 bristles. Exopodial joints 2-5 fused, with total of 10 bristles.

Sixth Limb: Rather rectangular in shape, with 2 endites: endite I with 3 small spinous bristles; endite II separated by space from endite I, with 4 or 5 long spinous terminal bristles. End joint with 7-9 bristles with short spines (spines on 2 posterior bristles similar to those on others).

Seventh Limb: Proximal group with 4 bristles, 2 on each side, each with 4 bells. Terminal group with 6 bristles, 3 on each side (1 short with 3 bells, 2 long with 5 or 6 bells). Terminal comb with 4 or 5 curved teeth opposite 2 small curved pegs.

Furca: Each lamella with 6 claws, all with teeth along posterior edges and spines along anterior edges; claw 1,2, and 4 nonarticulated. Right lamella anterior to left by width of base of claw 1, with medial spines near anterior edge and spines along anterior edge, and with few long spines following posterior claw.

Bellonci Organ: Elongate, bare, with 5 weak sutures in middle part and broadly rounded tip.

Eyes: Lateral eye with 5 ommatidia and dark brown pigment between ommatidia. Medial eye larger than lateral eye, bare, with dark brown pigment.

Upper Lip: Evenly rounded, hirsute, with few anterior hairs but no thickened spines.

Genitalia: Oval (with attached oval spermatophore) on each side of body anterior to furca.

Posterior of Body: Evenly rounded bare.

Y-Sclerite: With ventral branch. Eggs: USNM 193935 with 2 large unextruded eggs, length of 1 egg 0.19 mm.

COMPARISONS.—The digitate (serrate) bristles on the carapace of C. triplex are similar to those of C. radix Komicker (1992, fig. 87a,d) except in that species the digitations are on a diaphanous flare at the tip of the bristles. The mandible of C. radix differs from that of C. triplex in having 2 proximal prongs on the ventral claw of the 1st endopodial joint.”

(Kornicker, 1994, p.158-161)

Chelicopia triplex

ETYMOLOGY.—From the Latin triplex (threefold).

HOLOTYPE.—Undissected adult female in alcohol in collection of the Museum of Victoria.

TYPE LOCALITY.—Slope 1, 34°59.52′S, 151°5.94′E, New South Wales, off Nowra; depth 204 m.

PARATYPES.—Slope 1: USNM 193935, adult female on slide and in alcohol; 5 unopened adult females in alcohol (7th limb with cylindrical bristles (visible through shell) indicating specimens are adults).

DISTRIBUTION.—Slope 1, 204 m.

DESCRIPTION OF ADULT FEMALE (Figures 90, 91).—Carapace round in lateral view, without incisur (Figure 90b); carapace in dorsal view broader in posterior half (Figure 90a).

Posterior edge of caudal process slightly concave (Figure 90e,f), but concavity not reflected in convex outline of valve which extends past concavity.

Ornamentation: Surface with abundant short bristles with digitate (serrate) tips (Figure 90c,d). Longer bristles, most with rounded tips, present in vicinity of posterior edge of caudal process (Figure 90f). Long slender bristles stouter in proximal half and with pointed tips sparsely distributed along valve edges, especially along anterior (Figure 90d) and ventral edges. Slender bristles, some with broad triangular base, sparsely distributed on outer surface and near edges, more abundant in vicinity of posterior edge of caudal process; a few bristles with short broad part near tip; concave edge of caudal process with 1 or 2 straight pointed bristles on ventral and dorsal ends (Figure 90e). Surface without gel-like coating.

Infold: Anterior infold with 1 small bristle ventral to midheight of valve (Figure 90d). Infold of caudal process with row of 5 or 6 bristles along narrow list and several slenderer bristles along inner margin of infold (Figure 90f). Posterior infold with 2 setal bristles dorsal to caudal process (Figure 90f).

Selvage: Broad continuous lamellar prolongation along anterior, ventral and posterior margins of valve; long fringe of hairs observed on edge of prolongation along anterior margin of left valve of USNM 193935 but not on right.

Carapace Size (length, height in mm): Slope 1: holotype, 0.86, 0.73; USNM 193935, 0.87, 0.78; 5 specimens: 0.86, 0.73; 0.84, 0.71; 0.78, 0.72; 0.81, 0.77; 0.81, 0.69. Length range 0.78–0.87.

First Antenna (Figure 90g,h): 1 st joint bare. 2nd joint with 1 dorsal bristle with long hairs. 3rd and 4th joints fused; 3rd joint with 2 equilength bare bristles (1 dorsal, 1 ventral); 4th joint with 2 bristles (1 short dorsal with few indistinct short spines, 1 long spinous ventral). 5th joint with long ventral bristle with 1 minute filament. Medial bristle of 6th joint short with few indistinct spines. 7th joint: a-bristle about 3 times length of bristle of 6th joint with few indistinct spines; b-bristle about twice length of a-bristle, bare except for terminal spine; c-bristle longer than bristle of 5th joint, with 2 small proximal filaments and 1 minute spine-like distal filament. 8th joint: d-and e-bristles very slightly shorter than bristle of 5th joint, bare with blunt tips; f-bristle about same length as e-bristle, with 2 small proximal filaments and 1 minute spine-like distal filament; g-bristle about same length as bristle of 5th joint, with 2 small proximal filaments and 1 minute spine-like distal filament. (Filaments on bristles of 7th and 8th joints not shown.)

Second Antenna: Protopodite bare. Endopodite 1-jointed with 1 proximal bristle and very low terminal bulge (Figure 90i). Exopodite: 1st joint with small bent medial terminal bristle; bristle of 2nd joint long with 21 slender proximal ventral spines and distal natatory hairs; bristles of joints 3–8 long with proximal ventral spines and distal natatory hairs; 9th joint with 2 bristles (ventral long with proximal ventral spines and distal natatory hairs; dorsal short with small hairs); joints 2–7 with row of minute spines along distal margins.

Mandible (Figure 90j): Coxale with ventral spines and endite represented by stout spine (not shown). Basale with 4 short ventral bristles, 1 lateral bristles at joint midheight, and 1 distal dorsal bristle. Exopodite represented by slender spine. 1st endopodial joint: medial surface with few distal spines, row of spines along dorsal of distal margin, and 2 spine-like bristles at base of stout ventral claw; lateral surface with spines along dorsal half of distal margin. 2nd endopodial joint with 2 distal spine-like dorsal bristles, lateral spines near base of 3rd endopodial joint, and stout ventral claw. 3rd endopodial joint with 2 small spine-like bristles (1 ventral, 1 dorsal) at base of stout terminal claw.

Maxilla: Protopodite with single spinous dorsal bristle (bristle displaced in Figure 91b), fringe of dorsal hairs, and diaphanous thumb like process (latter observed on only 1 limb) (fringe and diaphanous process not shown in Figure 90b). Endite I with 6 bristles; endite II with 4 bristles; endite III with 6 bristles (Figure 91a). Basale with short bristle near base of exopodite (bristle displaced in Figure 91b). Exopodite with 2 bristles. 1st and 2nd endopodial joints typical (Figure 91b).

Fifth Limb (Figure 91 c): Single endite with 1 small bristle. 1st exopodial joint with 2 bristles. Exopodial joints 2–5 fused, with total of 10 bristles.

Sixth Limb (Figure 91d): Rather rectangular in shape, with 2 endites: endite I with 3 small spinous bristles; endite II separated by space from endite I, with 4 or 5 long spinous terminal bristles. End joint with 7–9 bristles with short spines (spines on 2 posterior bristles similar to those on others).

Seventh Limb: Proximal group with 4 bristles, 2 on each side, each with 4 bells. Terminal group with 6 bristles, 3 on each side (1 short with 3 bells, 2 long with 5 or 6 bells). Terminal comb with 4 or 5 curved teeth opposite 2 small curved pegs.

Furca (Figure 91e): Each lamella with 6 claws, all with teeth along posterior edges and spines along anterior edges; claw 1, 2, and 4 nonarticulated. Right lamella anterior to left by width of base of claw 1, with medial spines near anterior edge and spines along anterior edge, and with few long spines following posterior claw (not shown).

Bellonci Organ (Figure 91f): Elongate, bare, with 5 weak sutures in middle part and broadly rounded tip.

Eyes (Figure 91f): Lateral eye with 5 ommatidia and dark brown pigment between ommatidia. Medial eye larger than lateral eye, bare, with dark brown pigment.

Upper Lip (Figure 91 g): Evenly rounded, hirsute, with few anterior hairs but no thickened spines.

Genitalia (Figure 91h): Oval (with attached oval spermatophore) on each side of body anterior to furca.

Posterior of Body (Figure 91h): Evenly rounded bare.

Y-Sclerite (Figure 91h): With ventral branch.

Eggs: USNM 193935 with 2 large unextruded eggs, length of 1 egg 0.19 mm.

COMPARISONS.—The digitate (serrate) bristles on the carapace of C. triplex are similar to those of C. radix Kornicker (1992, fig. 87a,d) except in that species the digitations are on a diaphanous flare at the tip of the bristles. The mandible of C. radix differs from that of C. triplex in having 2 proximal prongs on the ventral claw of the 1st endopodial joint.

Parasarsiella Poulsen, 1965

Parasarsiella Poulsen, 1965:70.—Kornicker, 1986:38.

Metasarsiella Kornicker, 1991:104.

TYPE SPECIES.—Sarsiella globulus Brady and Norman, 1887, by monotypy.

COMPOSITION.—Four species are referred to this genus: P. benthedi (Kornicker, 1992:166), P. globulus, P. vibex (Kornicker, 1992:105), and P. poorei, new species herein.

DISTRIBUTION.—Parasarsiella benthedi from western Indian Ocean, depth 50–150 m, P. globulus from between the Canary Islands and Cape Verde Islands at depths of 932–2333 m, and off Frederiksted, St, Croix, U.S. Virgin Islands at unknown depth, P. vibex from Enewetak lagoon, depth 2–7 m, and P. poorei from Slope 1, depth 204 m.

REVISED DIAGNOSIS.—Furca with only claw 1 nonarticulated, claws decreasing in length and width along lamella, with either 7 claws on each lamella, or 6–8 on left lamella and 5 or 6 on right lamella, and more claws on left lamella than on right, or with 6 claws on each lamella and claw 3 about same length and width as claw 4. Sixth limb with 1 or 2 endites.