Comprehensive Description

provided by Smithsonian Contributions to Zoology
Bruuniella hazeli

ETYMOLOGY.—The species is named for Dr. Joseph E. Hazel.

HOLOTYPE.—USNM 152849, 1 ovigerous female on slides and in alcohol.

TYPE-LOCALITY.—Station 9, Vineyard Haven Harbor, Martha's Vineyard, Massachusetts.

DISTRIBUTION.—Known only from type-locality.

DESCRIPTION OF FEMALE (Figures 35, 36).—Carapace elongate in lateral view, greatest height at the middle (Figure 35a); dorsal margin broadly convex, ventral margin linear; posterior evenly rounded; incisur wide, inner end at valve midheight.

Infold: Behind rostrum with 7 bristles forming row parallel to anterodorsal margin, 1 distal bristle on list, and 4 bristles forming row between list and incisur (Figure 35c); 1 short bristle present near inner end of incisur; anteroventral infold with 10 bristles forming row; about 7 bristles along ventral infold to point opposite lowermost, hyaline, flap-like bristle on posterior list. List beginning near inner margin of anterior part of infold extending along ventral infold and becoming broader on posterior infold; broad posterior list with about 8 transparent bristles (Figure 35d), 1 or 2 short bristles between each pair of transparent bristles (total of about 10 short bristles); about 6 short bristles and 3 or 4 faint processes between broad posterior list and posterior margin of valve.

Size: USNM 152849, holotype, length 0.79 mm, height 0.44 mm.

First Antenna (Figure 35e): 1st joint bare; 2nd joint relatively short for subfamily, with 1 spinous, dorsal, terminal bristle, long hairs forming few distal rows on medial surface, and short spines forming distal rows on lateral surface; 3rd, 4th, and 5th joints fused; ventral margin with 2 spinous proximal bristles and few long proximal hairs; dorsal margin with 9 bristles (1 proximal and 1 distal spinous bristle, 4 spinous claw-like bristles with bases on lateral side, and 3 slender spinous bristles with bases on medial side); sensory bristle of 5th joint with 2 short subterminal filaments and 4 long terminal filaments; medial side of 6th joint and distal part of 4th-5th joints with abundant short spines near dorsal margin; short medial bristle of 6th joint with base near ventral margin. Seventh joint: a-bristle claw-like with proximal teeth on dorsal margin; b-bristle about one-third longer than a-bristle, with 2 short proximal filaments and 4 longer distal filaments including stem; c-bristle about twice length of a-bristle, with 7 filaments including stem. Eighth joint: d-bristle absent, e-bristle same length as a-bristle; f-bristle bent dorsally, with 5 filaments including stem; g-bristle slightly longer than a-bristle, with 4 filaments including stem.

Second Antenna: Protopodite bare. Endopodite 2-jointed (Figure 35f): 1st joint short bare, 2nd joint with long terminal bristle. Exopodite: bristle of 2nd joint reaching past 9th joint, with short marginal hairs; joints 2–8 with natatory bristles with faint ventral spines; 9th joint with 3 bristles (1 long, 1 medium, 1 short; long bristle with natatory hairs, others not seen clearly); basal spines absent.

Mandible (Figure 36a–c): Coxale endite faint; ventral branch may be broken off specimen examined, but lobe with 4 minute bristles in its place, 1 or 2 minute bristles proximal to lobe (Figure 36a). Basale: endite with 2 short, pectinate, end bristles and 3 slender, bare, proximal bristles; medial surface with long hairs, ventral margin bare; dorsal margin with 2 spinous terminal bristles. Exopodite about length of dorsal margin of 1st endopodite joint, hirsute, with 2 terminal bristles almost reaching end of 2nd endopodite joint. Endopodite: 1st joint short, with 3 long, spinous, ventral bristles: medial of these shorter than others and with abundant short spines, others with long proximal and short distal spines; 2nd and 3rd endopodial joints fused, with 3 stout claws (middle of these with broader base than others, distal claw longer than others and with base on lateral side and with short ventral and dorsal spines), and 10 bristles (1 minute dorsal bristle proximal and lateral to proximal dorsal claw, 1 bristle about same length as middle claw with base ventral and lateral to middle claw, 1 bristle about same length as middle claw with base medial to distal claw, 1 long bristle with base on lateral side between dorsal and middle claws; 1 short bristle with base medial to distal claw, 4 long bristles ventral to distal claw, and 1 minute medial bristle between proximal and middle dorsal claws).

Maxilla (Figure 35g): Epipodite short, triangular, bare; endite I with 2 long and 1 short bristle; endite II with 3 long bristles; ventral margin of basale with 1 short midbristle and 1 long terminal bristle; endopodite obscure on appendage examined, with 1 long, spinous, terminal bristle.

Fifth Limb (Figure 35h): Comb with 1 long, spinous, exopodial bristle with 1 minute bristle ventral to its base; about 5 minute exopodial bristles near ventral margin.

Sixth Limb (Figure 36d): Anterior and posterior margins concave; medial side with 1 short, bristle-like spine in anterior proximal corner and 1 shorter, bristle-like spine near middle of anterior margin; ventral margin with stiff long hairs but no bristles; short spines forming rows near middle of medial side; long hairs along ventral margin, and on medial side near anterior and posterior margins.

Seventh Limb (Figure 36f): Limb with 6 distal bristles, each with 3–5 bells; terminus consisting of minute opposing combs; exact number of comb teeth could not be ascertained.

Furca (Figure 36g–i): Small furca fragmented on specimen, with about 7 or 8 claws; distal claws long, curved, proximal shorter claws tending to be straight; minute spines or teeth along posterior margins.

Bellonci Organ (Figure 36j): Broadening anteriorly with rounded tip.

Eyes: Medial eye well developed, bare (Figure 36j). Lateral eyes slightly larger than medial eye, pigmented, with many ommatidia (Figure 36k).

Posterior of body (Figure 36g): Tuft of long hairs present at midposterior margin, but no dorsal process.

Eggs: Holotype with 8 eggs.

COMPARISONS.—The new species, B. hazeli, differs from Bruuniella breviata Poulsen, 1965, in many characters, but mainly in not having any ventral bristles on the 6th limb, and in having on the sensory bristle of the 5th joint of the 1st antenna 2 short proximal and 4 long terminal filaments. In the last character, the new species also differs from Bruuniella species A described from Bermuda (Kornicker, 1981b: 12), which has 6 long terminal filaments on the sensory bristle.

Prionotoleberis Kornicker, 1974

TYPE-SPECIES.—Prionotoleberis gyion Kornicker, 1974b:43.

DISTRIBUTION.—Mediterranean Sea; off Mauritania, West Africa; off Florida, Gulf of Mexico. Known depth range 2–238 m.

COMPOSITION.—This genus is represented in the study area by 1 species, P. salomani, new species.
bibliographic citation
Kornicker, Louis S. 1986. "Cylindroleberididae of the Western North Atlantic and the Northern Gulf of Mexico, and Zoogeography of the Myodocopina (Ostracoda)." Smithsonian Contributions to Zoology. 1-139. https://doi.org/10.5479/si.00810282.425