“Pantopipetta buccina, new species Fig. 15
Material examined. Vema: V-18-35 (one female (holotype, USNM 234608)), V-17-6 (one ovigerous female (paratype, USNM 234631)).
Distribution. The new species is known from its type locality, west of Smith Island, South Shetland Islands, in 3193-3204 m, and from southwest of Concepcion, Chile, in 4303-4323 m.
Diagnosis. Lateral processes long, well separated, distally swollen, trumpet shaped, with low rounded dorsodistal tubercles. First coxae without tubercles. Abdomen inflated, short, only extending to tip of first coxae, fourth legs, downcurved. Palps with 7 segments, four terminal segments cylindrical, about twice longer than their diameters. Tarsus about 0.6 times length of propodus, claw tong, about 0.4 times length of propodus.
Description. Size moderate for genus, leg span 20.6 mm. Trunk and lateral process integument with low rounded papillae separated by their own diameters or more. Some parts of appendages with same sized integument papillae. Lateral processes long, twice to 4 times longer than maximum diameter, well separated by at least 4 times maximum diameter or more, distally trumpet shaped with low rounded dorsodistal tubercles and smaller ventrodistal swellings, neither with setae. Trunk segments very narrow, about same diameter as lateral processes. Ocular tubercle long, tapering to distal point, without hint of eyes. Abdomen a moderately short cylinder carried at ventral oblique angle, extending less than half length of second coxae of fourth legs, armed with few short dorsodistal setae. Proboscis typical, quite narrow proximally, annulate over most of its length, slightly longer than trunk.
Palps typical, 7-segmented, long and slender, four terminal segments cylindrical, each shorter than last proximal segment except for terminal segment which is slightly longer than penultimate segment, all armed with field of short ventral and ventrodistal setae.
Ovigers (female) with sixth segment longest, slightly longer than fourth. Fifth and sixth segments with few short distal setae. Strigilis denticulate spine formula 4: 3: 3: 4, with a small terminal claw only little larger than denticulate spines. Terminal segment tapering to slender point.
Legs slender, armed with few short ventral setae increasing in numbers on distal segments and usual longer dorsodistal spine on major segments. Second coxae about 3 times length of first or third. Third segment with tall slender dorsal tuberele slightly longer than twice segment diameter. Second tibiae only about 0.6 length of first, femora the longest segments. Tarsus about 0.6 length of moderately short propodus. Propodus slightly curved, armed with many very short sole spines and with slightly curved terminal claw about 0.4 as long as propodus, armed with row of tiny low endal serrations.
Male characters and variation among specimens unknown.
Measurements (in millimeters). Trunk length (palp insertion to tip fourth lateral processes), 3.04; trunk width (across second lateral processes), 1.99; proboscis length, 3.13; abdomen length, 0.61; third kg, coxa 1, 0.38; coxa 2, 1.13; coxa 3, 0.36; femur, 2.26; tibia 1, 2.2; tibia 2, 1.44; tarsus, 0.48; propodus, 0.73; claw, 0.31.
Etymology. The species name (Latin: buccina, a shepherd's horn or a trumpet) refers to the distally flaring lateral processes which resemble the bell of a trumpet as seen in lateral view.
Remarks. This new species has several characters which differ markedly from those of the most closely related species, P. lata Stock and P. longituberculata (Turpaeva). In comparison with Stock's P. lata, P. buccina has similar but slightly larger lateral process tubercles and has slight bulges not quite large enough to be called tubercles on the ventral or opposite side from the dorsodistal tubercles. These ventral tubercles are not found in P. lata. The four distal palp segments in P. buccina are each shorter than those of P. lata, the tarsus of the new species is much longer than that of Stock's species, and the integument of the new species is, in places, heavily papillose, a feature not nearly so conspicuous in P. lata. The trunk length/width ratio is 1.3:1 in the new species and is slightly shorter at 1.2:1 in P. lata.
The tarsus of P. buccina, as stated, is also quite a bit longer than that of P. longituberculata, in relation to the length of the propodus, and the terminal four palp segments are shorter in the new species than those of Turpaeva's species. There is an additional denticulate spine per strigilis segment in P. buccina, and the terminal strigilis claw is much shorter and smaller in diameter than that found in Turpaeva's species.” (Child 199, p.84-86)
