Kanikipa portobelloensis, Bird, 2011

BIRD, GRAHAM J., 2011, Paratanaoidean tanaidaceans (Crustacea: Peracarida) from littoral and shallow sublittoral habitats in New Zealand, with descriptions of three new genera and seven new species, Zootaxa 2891 (1), pp. 1-62 : 48-53

Kanikipa portobelloensis n. sp.

Figs 27–30

Material examined. Holotype: ovigerous female, 2.6 mm, Quarantine Island, Otago Harbour , Hicks-2, [CR.21794] . Allotype: preparatory male, 2.0 mm, Quarantine Island, Otago Harbour , Hicks-2, [CR.21795] . Paratypes: one manca-II, three neuters, two ov. females, Hicks-1, [CR.21793]; six manca-II, ten manca-III, 21 neuters, five ov. females [one partly dissected on microslide: CR.21797], six prep. males, Hicks-2, [CR.21796]. Other material: Pegasus Bay ( Knox et al 1978): one ov. female, Stn. 1.1, [CR.21799]; one ov. female, Stn. 4.1, [CR.21800]; one manca-III, Stn 7.3, [CR.21801]; one neuter, Stn. 9.2, [CR.13156]; one neuter, Stn. 9.3, [CR.21803]; one neuter, one prep. male, Stn. 10.3, [CR.21804]: three neuters, one post.ov. female, one prep. male, Ports NZ 1STW410-TN, [ NIWA: 70538]; one neuter (female?), Q-726, [ NIWA.62674]; one prep. male, GJB:RW/ 18-11 .

Etymology. From the site near Portobello, Otago Harbour, where the species was first recorded. This is retention of the name ‘ portobelloensis ’ [or ‘ portobellensis’, sic] proposed by the late Jurgen Sieg (unpubl.).

Type locality. Quarantine Island , Otago Harbour, Otago, South Island, New Zealand, intertidal sand .

Description [excluding most given in generic diagnosis]: Female (including non-ovigerous): Habitus ( Fig. 27A–B ) 8.4 times ltb; length 1.6–2.9 mm (non-ov. female), 1.93–2.6 mm (ov. female). Cephalothorax ( Fig. 27C ) weakly hexagonal, widest at mid-length, 1.4 times ltb, shorter than pereonites 1–2; rostral margin weakly produced; anterolateral margins with one seta just posterior to antennule. Pereon 60% of body length, parallel-sided, pereonite-2 longest, pereonite-6 shortest, pereonites 3–4 subequal, 0.71, 1.1, 1.0, 0.91, 0.78, and 0.65 times as long (Stewart Island): B dorsum; C cephalothorax rostral; D pleon sternites lateral view; E pleotelson; F pleotelson apical process; G antennule (with terminal seta from another specimen); H antenna; J uropod; K uropod peduncles. Scale bar: 1 mm for A–B, 0.5 mm for D–E, 0.25 mm for C and F–J. pleonite-5 longest; epimera with long simple seta; sternites low, rounded in profile. Pleotelson ( Figs 27E–F ) as long as pleonites 4–5, shorter than broad, 0.6 times as long as broad, with weakly rounded posterior margin bearing two simple and two PSS, with deflexed process bearing two short and two long setae.

Antennule ( Fig. 27G ) 0.8 times as long as cephalothorax, slender, six times ltb, 75% of total length; article-1 three times ltb, with group of three lateral PSS, a distolateral long simple seta and at least one PSS; article-2 1.6

times ltb, with distomesial seta, one simple seta and three lateral PSS; article-3 0.75 times as long as article-2, with two distal seta; article-4 narrow, 3.6 times ltb, as long as article-2, with two small PSS, two simple setae, and one long complex seta and integral aesthetasc. Antenna ( Figs 27H ,) slender, 0.75 times as long as antennule; segments 1-3 simple, naked, article-2 slightly larger than article-3; article-4 slender, six times ltb, with three simple and two distal PSS; article-5 third length of article-4, with one distal seta; article-6 just longer than broad, with three simple setae and one complex [fused?] seta and integral aesthetasc.

Labrum (Fig. 28A) large, hood-shaped. Labium (Fig. 28B) with sub-conical inner projection. Mandibles (Figs 28C–D) with narrow incisors, left and right each with three teeth, lacinia mobilis subrectangular; molar strong, narrow but with crushing/piercing tip of about six teeth and one narrow spine. Maxillule (Fig. 28E) with nine terminal spines, several pectinate. Maxilla (Fig. 28F) large, subconical. Maxilliped (Fig. 28G) bases with distal seta overreaching endite; palp segment-1 naked; segment-2 large; segment-4 with five distal setae. Epignath (Fig. 28H) longer than maxilliped.

Cheliped (Figs 28J–L) coxal sclerite sub-conical, reaching posterior margin of cephalothorax; basis with large posterior attachment to coxa, with superior seta; merus inferior margin as long as that of carpus, with one inferior seta; carpus 1.3 times ltb, with inferodistal margin crenate, with two superior and two inferior setae; chela longer but narrower than carpus; palm superior margin crenate, with lateral crenate ridge, two inferior setae, and two mesial setae; fixed finger as long as palm, incisive margin with proximal and three distal setae, and two triangular teeth, terminal spine narrow; dactylus with crenate superior margin, with one mesial seta.

Pereopod-1 (Fig. 29A) coxa annular, with seta; basis shorter than distal segments, as broad as those of pereopods 4–6, only 2.3 times ltb, with a superior simple seta and PSS; ischium with seta 0.75 times length of merus; merus inferodistal margin with small mesial seta and large pectinate spine over-reaching carpus; carpus as long as merus, with one superior and one inferior pectinate spine about as long as propodus, inferior margin with numerous microtrichia; propodus 1.3 times longer than carpus, with inferior microtrichia and pectinate spine; dactylus about half-length of distally very thin unguis, together 1.5 times longer than propodus. Pereopod-2 (Fig. 29B) similar to pereopod-1 but merus and carpus slightly shorter; carpus with additional small inferior spine. Pereopod-3 (Fig. 29C) similar to pereopod-2 but basis with an inferior PSS; merus slightly shorter.

Pereopod-4 (Fig. 29D) basis 3.2 times ltb, naked; ischium with one long and one short seta; merus twice as long as broad, with two pectinate spines; carpus rectangular, three times ltb, inferior margin with numerous microtrichia, with three pectinate spines and superior bone-shaped seta; propodus as long as carpus but narrower, inferior margin with numerous microtrichia, with one superior distal spine and two inferodistal pectinate spines; dactylus with few inferior spinules; unguis one third length of dactylus, together just longer than propodus. Pereopod-5 (Fig. 29E) similar to pereopod-4 but basis wider; one meral spine longer; unguis with multifurcate tip. Pereopod-6 (Fig. 29F) similar to pereopod-5 but propodus with three superior distal spines.

Pleopod (Fig. 29G) relatively small, endopod subovate, twice as long as broad, with distomesial seta and five lateral setae, with gap between fringe and peduncle; exopod broader than endopod, with proximal seta separated from nine distolateral seta.

Uropod ( Figs 27J–K ) slender, as long as pleotelson, pleonite-5 and half of pleonite-4; peduncle 2.5 times ltb, with slightly curved, nail-like, distomesial segmented spine; exopod slender, five times ltb, 0.7 times as long as segment-1 of endopod, with distal seta and two unequal terminal setae; endopod twice as long as peduncle, 2-segmented, segment-1 longer, with distal simple and two pinnate setae; segment-2 with ca. five simple setae and two PSS.

Manca-II: Habitus ( Fig. 30A ); length 0.88–1.13 mm; uropod ( Fig.30B ) peduncle with spine.

Manca-III: Habitus ( Fig. 30C ); length 1.07–1.37 mm.

Preparatory male: Habitus ( Fig. 30D ) similar to non-ovigerous female but pleon proportionately larger, 20% of body length; length 1.77–2.36 mm. Antennule ( Fig. 30E ) 5-articled, articles 1–3 broader; article-4 small, just longer than broad, naked.

Remarks. The length and obvious pectination of the pereopodal merus and carpus spines are remarkable but the pattern is similar to that seen in the genera mentioned above. The uropod peduncular spine is present even in the small manca-II. This species was recorded as ‘ Leptognathia portobellensis ’ or ‘ Leptognathia portobelloensis ’ in the Te Papa and NIWA I.C. databases, a formulation established by the late J. Sieg, even to the extent of depositing ‘ type material’.

Distribution and ecology. Kanikipa portobelloensis n. sp. has been recorded from Stewart Island, Otago Harbour, off the Canterbury coast, the northwest coast of the South Island, and the Cook Strait region of North Island,

Figures

FIGURE 27. Kanikipa portobelloensis n. sp. Holotype ovigerous female (Otago Harbour): A dorsum; non-ovigerous female

FIGURE 30. Kanikipa portobelloensis n. sp. Paratype manca-II: A dorsum; B uropod peduncle; paratype manca-III: C dorsum; Allotype preparatory male: D dorsum; E right antennule, superior-lateral view. Scale bar: 1 mm for A, C–D, 0.125 mm for B and E.