Tanaella kimi, Guerrero-Kommritz, Jürgen & Blażewicz-Paszkowycz, Magdalena, 2004

Guerrero-Kommritz, Jürgen & Blażewicz-Paszkowycz, Magdalena, 2004, New species of Ta n a e l l a Norman and Stebbing, 1886 (Crustacea: Tanaidacea: Tanaellidae) from the deepsea off the Antarctic and the Angola Basin, with a key to the genus, Zootaxa 459, pp. 1-20 : 8-13

publication ID	https://doi.org/ 10.5281/zenodo.157689
DOI	https://doi.org/10.5281/zenodo.5689263
persistent identifier	https://treatment.plazi.org/id/038787D6-FFBB-FFC6-BA54-15DCFDCFC682
treatment provided by	Plazi
scientific name	Tanaella kimi
status	sp. nov.

Treatment

Tanaella kimi View in CoL sp. nov. ( Figs. 4–6 View FIGURE 4 View FIGURE 5 View FIGURE 6 )

Material examined: holotype: ZMH K 40297, adult male, 2.83 mm, ANT XV/3, station 48272, 71°28.76`S 015°10.3`W, EBS, depth 2077 m, 26 February 1998. Paratypes: ZMH K 40298, one male, 2.98 mm (dissected), one female, 2.62 mm, ANT XV/3, station 48272, 71°28.76`S 015°10.3`W, EBS, depth 2077 m, 26 February 1998.

Diagnosis: Cheliped narrow, without proximal tubercle on inner margin of dactylus. Maxilliped endites with tubercle. Labium narrow. Pereopods 4–6 with ventral margin of propodus not serrated. Male pereopods 4–6 without hookshaped distal spiniform setae. Uropod as long as pleotelson, composed of twoarticled endopod.

Description: male. Body ( Fig. 4 View FIGURE 4 a, b) elongate, about five times longer than wide.

Cephalothorax ( Fig. 4 View FIGURE 4 a, c) shorter than pereon, triangular, posterior end twice as broad as anterior end.

Pereon twice as long as pleon, pereonite one shorter in length than pereonite two, pereonites two and three equal in length, pereonite four longest, pereonite five slightly shorter than four, and pereonite sixth the shortest.

Pleon as wide as pereon, pleonite three narrower than all others, pleonites one, two, four and five equal in length. Pleotelson as long as last four pleonites together, pentagonal, with apex rounded.

Antennula ( Fig. 5 View FIGURE 5 a) fourarticled. First longest (longer than second) with three setulose and one simple setae distally. Second article with one pinnate seta distally. Third article shortest with one simple seta distally. Fourth article 1.5 times longer than third, with six simple.

Antenna ( Fig. 5 View FIGURE 5 b) fourarticled. First article longest with three setulose setae distally Second article as long third and fourth combined. Third article shortest with four simple setae. Fourth article with six simple terminal setae.

Mouthparts: Labrum ( Fig. 5 View FIGURE 5 c) hoodlike, distal outer margins with setules. Mandible ( Figs. 5 View FIGURE 5 d, e) right mandible incisor pointed with three teeth; left mandible incisor with blunt teeth, lacinia mobilis pointed; seven terminal teeth on the molar process. Maxillula ( Fig. 5 View FIGURE 5 f) endite longer than palp, with five ventral comb setae at midlength; endite, distal end with four pinnate and five simple setae, and one short setae. Palp with two unequal long setae. Maxilla ( Fig. 5 View FIGURE 5 g) triangular, naked. Labium ( Fig. 5 View FIGURE 5 h) composed of two triangular lobes, apical margin with one spiniform seta and many setules. Maxilliped ( Fig. 5 View FIGURE 5 i) basis fused. Endites rectangular with one seta and one tubercle on the distal inner margin. Palp fourarticled. First article square, with two comb setae. Second article, outer margin with two comb setae and one strong seta, inner margin with three setae. Third article, inner margin with four strong setae. Fourth article, inner margin with three setae, and three terminal strong setae. Epignath ( Fig. 5 View FIGURE 5 j) falciform rounded at proximal end, with one terminal seta.

Cheliped ( Figs. 5 View FIGURE 5 k, k`) attached to cephalothorax laterally by sidepiece. Basis strong and naked. Merus, ventrally with one minute simple seta. Carpus with two ventral simple setae and two dorsal setae (submiddle and one distal), one tubercle near insertion of propodus. Propodus twice as long as broad, with two ventral setae, three dorsal setae near cutting edge and one simple seta near insertion of dactylus. Cutting edge composed of four blunt teeth. Dactylus with two short ventral setae.

Pereopod 1 ( Fig. 6 View FIGURE 6 a) coxa with seta. Basis as long as carpus and propodus combined length with a row of setules ventrally. Ischium short with one seta. Merus subequal in length to propodus, triangular with one strong distal seta. Carpus with two strong and one minute distal setae. Propodus slightly longer than dactylus and unguis combined length, with two comb setae, two rows of spinules, one strong short seta ventrally. Dactylus with one long slender seta. Unguis as long as dactylus.

Pereopod 2 ( Fig. 6 View FIGURE 6 b) as pereopod 1 except basis with two ventral thin simple setae at midlength. Carpus with two long and one short strong setae. Propodus with one strong and one thin terminal setae and terminal margin with spinules.

Pereopod 3 ( Fig. 6 View FIGURE 6 c) as pereopod 2 (setae on basis not drawn).

Pereopod 4 ( Fig. 6 View FIGURE 6 d) coxa absent. Basis slightly shorter than merus, carpus and propodus combined, with two setulose setae at midlength. Ischium with two setae one short and one long. Merus triangular with two strong distal setae. Carpus slightly longer than merus with four distal strong setae. Propodus slightly longer than carpus with two rows of spinules ventrally and three long strong distal setae. Dactylus subequal to unguis with a ventral groove bordered by spinules. Unguis sharp.

Pereopod 5 ( Fig. 6 View FIGURE 6 e) as pereopod 4, except basis with only one setulose thin seta at midlength. Carpus with an additional short seta.

Pereopod 6 ( Fig. 6 View FIGURE 6 f) as pereopod 5, except basis without setae, carpus with three terminal long strong setae, propodus with four strong distal setae, dactylus slightly longer than unguis.

Pleopods ( Fig. 6 View FIGURE 6 g) biramous; basal article rectangular. Endopod rectangular with 12 long terminal setae. Exopod rectangular with 10 long terminal setae and one relatively short simple seta on dorsal margin.

Uropods ( Fig. 6 View FIGURE 6 h) uniramous. Basal article uniarticulate with one tubercle with one long and one short seta. Endopodite with one setulose and two long simple setae laterally and four simple (two short and two long) distally.

Females: similar to males except third article of antenna longer and without a dense row of distal setules basally. Pleopods are missing. Pleonites broader than in males ( Fig 4 View FIGURE 4 f). Antennula and antenna are different than those of male:

Antennula ( Fig. 4 View FIGURE 4 d) fourarticled. First longest (1.5 times longer than second) with four setulose and one simple setae. Second article with one long simple and one setulose setae distally. Third article shortest with one simple and one setulose seta distally. Fourth article 1.5 times longer than third, with one aesthetasc, three long simple, one terminal plumose seta and one minute subdistal seta.

Antenna ( Fig. 4 View FIGURE 4 e) sixarticled. First article small (not illustrated), partially fused with cephalothorax. Second article twice as long as third, with three comb setae dorsally. Third article with one simple terminal seta. Fourth article longest (twice as long as fifth and sixth combined length) with two long simple, one short simple, and three setulose terminal setae. Fifth article with two long simple setae distally. Sixth article minute with four long simple and one short minute subterminal seta. Ovigerous female unknown. Mancas unknown.

Etymology: named in honour of the tanaid specialist and our friend and colleague Dr. Kim Larsen.

Remarks: The material consists of only three specimens: two with pleopods and one without. Thus only one male with pleopods was dissected.

This species resembles Tanaella mclellandi Larsen and Heard, 2004 but can be differentiated from it by the length of the pereonites: in T. mclellandi the first pereonite is shortest while the fourth and fifth are subequal; in T. kimi pereonite sixth is shortest while the fourth is longest. The setation of the antennula of T. mclellandi and T. kimi are different, articles one and three of T. mclellandi are naked, but in T. kimi setulose and simple setae are present. In T. mclellandi the propodus of pereopod 1 is shorter than the combined length of the dactylus and unguis, while the propodus in T. kimi is longer than the combined dactylus and unguis.