A new species of benthopelagic copepod of the genusTharybis(Calanoida: Tharybidae) from the upper slope, north‐eastern New Zealand

Abstract

A new species of benthopelagic calanoid Copepoda is described from off North Cape, New Zealand. The species, Tharybis inaequalis n. sp. (Family: Tharybidae), is the first record of this genus from New Zealand. T. inaequalis females are distinguished from all other described Tharybis by the asymmetrical fifth legs (long and thin on the left and short and squat on the right) with a pair of subequal outer terminal spines and an inner articulated terminal spine that is about 1.5 times the length of the outer spines. Males are most like those of T. compacta and T. minor but the inner lobe on right leg 5 segment 3 is small and rounded and entirely directed into the midline; the left leg 5 exopod segment 3 also has several distal lamellae and in inner proximal spine. As in T. minor, male antennule segments XXII and XXIII are separate on the left and fused on the right.

Two new species ofXanthocalanusand the first record ofBrachycalanus(Copepoda: Calanoida: Phaennidae) from the upper slope, north‐eastern New Zealand

“…In families that have an antennule geniculate between segments XX and XXI, XXII and XXIII are often fused. This characteristic has also been noted in Tharybis (Schulz 1981;Bradford-Grieve 2001a) and Macandrewella (Ohtsuka et al 2002). Giesbrecht (1892) notes the fusion of segments XXII and XXIII on the right in X. agilis, as does Tanaka (1960) in X. echinatus and X. pectinatus and Drs Nina Vyshkvartseva and Elena Markhaseva report this characteristic (unpubl.…”

New species of benthopelagic copepodXantharus(Calanoida: Scolecitrichidae) from the upper slope, eastern central New Zealand

“…Among the most plentiful of copepods taken in these samples were members of families (Scolecitrichidae, Phaennidae, and Tharybidae) that have setae on the endopod of the maxilla modified into chemo-sensory structures. These families made up 16-24% of the individuals in samples (Bradford-Grieve 2001a).…”

“…The benthopelagic calanoid copepod fauna of the New Zealand region is being described from samples taken from Wellington Harbour and the upper slope of the southeastern coast of North Island (Bradford 1969;Bradford-Grieve 1999,2001a,b, 2003,2004. Among the most plentiful of copepods taken in these samples were members of families (Scolecitrichidae, Phaennidae, and Tharybidae) that have setae on the endopod of the maxilla modified into chemo-sensory structures.…”

A new species of benthopelagic calanoid copepod of the genusBradyidiusGiesbrecht, 1897 (Calanoida: Aetideidae) from New Zealand

“…Recent collections of benthopelagic calanoid copepods (Bradford-Grieve 2001a) are adding to our knowledge of these crustaceans from the New Zealand slope. To date, the slope benthopelagic copepod fauna of New Zealand is known from Bradford (1969) and Bradford-Grieve (2001a,b) and shallow water species were reported from Wellington Harbour (Bradford-Grieve 1999).…”

“…The currently examined samples were taken from the upper slope of the south-eastern coast of the North Island using a plankton net suspended from the warps to the trawl boards of R.V. Kaharoa (see Bradford-Grieve 2001a) (Table 1).…”