Konarus straddi ( Bamber, 2008 ) BAMBER, ROGER N, 2013

BAMBER, ROGER N, 2013, A re-assessment of Konarus Bamber, 2006 and sympatric leptocheliids from Australasia, and of Pseudoleptochelia Lang, 1973 (Crustacea: Peracarida: Tanaidacea), Zootaxa 3694 (1), pp. 1-39 : 12-17

publication ID	https://doi.org/ 10.11646/zootaxa.3694.1.1
publication LSID	lsid:zoobank.org:pub:452C575E-A76C-4455-A8C6-67C5A365759C
persistent identifier	https://treatment.plazi.org/id/D03F87EC-D027-646F-CA83-EB4FFB9CFD00
treatment provided by	Felipe
scientific name	Konarus straddi ( Bamber, 2008 )
status	comb. nov.

Treatment

Konarus straddi ( Bamber, 2008) View in CoL comb. nov.

Figs 2E–F View FIGURE 2 ; 3–5 View FIGURE 3 View FIGURE 4 View FIGURE 5

Pseudoleptochelia straddi Bamber, 2008 View in CoL , 205–207; fig. 38.

Konarus cheiris Bamber, 2008, p. 184 View in CoL (non- Konarus cheiris Bamber, 2006 View in CoL ).

Type material: One male, holotype ( QM-W28148 ), two females, one juvenile, paratypes ( QM-W28113 ), amongst empty Phoronis tubes, Point Lookout , North Stradbroke Island , 27°26.31′S, 153°32.52′E, 10 m, 12.02.2005, coll. A-NL. Eleven females, paratypes ( BMNH 2006.1560 – 1569 ), eight within tubes amongst sponge, Point Lookout, 27°26.31′S, 153°32.52′E, 10 m, 12.02.2005, coll. A-NL GoogleMaps .

Other material: Four females without oostegites ( QM-W 28111) sponge and bryozoan epifauna, Point Lookout, 27°26.31’S, 153°32.52’E, 10 m, 12.02.2005. Three females ( QMW 28112), two within tubes in filamentous red algae, Point Lookout, 27°26.31’S, 153°32.52’E, 10 m, 12.02.2005. Two females ( QM-W 28114) among the alga Melanamansia glomerata, Flat Rock , north of North Stradbroke Island, 27°23.5’S, 153°33.0’E, 8– 15 m, 17.02.2005. Eight females ( QM-W 28115) among the algae Amphiroa fragilissima , with Asparagopsis taxiformis and Zonaria diesingiana, Flat Rock , north of North Stradbroke Island, 27°23.5’S, 153°33.0’E, 8–15 m, 17.02.2005. One female ( QM-W 28116) on the bryozoan Orthoscuticella ventricosa agg., Henderson’s Pinnacles, East side of Moreton Island, 27°07.901’S, 153°28.712’E, 22–26 m, 22.02.2005. All from diving, coll. A-NL. One brooding female, one manca ( QM-W 28472), on medium sand with detritus and holothurians, East of Moreton Island, 27°17.26’S, 153° 29.141’E, 40 m, 22.02.2005, long-arm van Veen grab, coll. RNB. One female (QM- W28473), MBWS Stn. 9; twelve females ( QM-W 28476), MBWS Stn. 10; both van Veen grab, coll. PJFD.

Description of female. Body ( Fig. 3A View FIGURE 3 ) 4.9 times as long as wide, figured specimen 3.2 mm long. Cephalothorax subrectangular, 1.1 times as long as wide, just longer than pereonites 1 to 3 together, with slight rounded rostrum, triangular eyelobes conspicuous, eyes present and black, three setae at posterior of eyelobes and three setae laterally on second thoracomere ( Fig. 3 View FIGURE 3 A′); dorsal cuticular groove distinguishing second thoracomere at posterior of cephalon (red in live specimens). Pereonites 1 to 3 subequal (pereonite 1 shortest), with paired anterolateral setae; pereonites 4 to 6 and pleonites with single mid-lateral setae; pereonites 4 and 5 subequal, about twice as long as pereonite 1, pereonite 6 shorter, 1.6 times as long as pereonite 1; all pereonites wider than long (respectively 3.4, 2.8, 2.8, 1.6, 1.6 and 2.4 times as wide as long). Each pleonite about six times as wide as long. Pleotelson ( Fig. 5F View FIGURE 5 ) rectangular, about as long as fifth pleonite, 2.4 times as wide as long, with one midlateral and one posteromedial seta on each side, and two simple and two fine distal setae.

Antennule ( Fig. 3B View FIGURE 3 ) of three articles, proximal article tumid, 1.8 times as long as wide, 2.1 times as long as distal two articles together, with long mesial and distal outer simple setae and pairs of outer penicillate setae; second article wider than long, distal outer and inner setae longer than article; third article 1.4 times as long as wide and 0.9 times as long as second article, with six simple and one penicillate distal setae and one aesthetasc.

Antenna ( Fig. 3C View FIGURE 3 ) proximal article compact, naked; second article 1.8 times as long as first, with dorsodistal seta, and rows of five mesiodistal and three ventrodistal spinules; third article about as long as wide, 0.8 times as long as second article, with single dorsal distal seta and shorter ventrodistal seta; fourth article longest, as long as second and third articles together and 2.4 times as long as wide, setose as figured; fifth article about half as long as fourth with one distal simple seta; sixth article minute, with seven distal setae.

Labrum ( Fig. 3D View FIGURE 3 ) lobate, marginally densely setose. Left mandible ( Fig. 3E View FIGURE 3 ) with crenulate lacinia mobilis, weak proximal crenulation on pars incisiva, pars molaris elongate, blunt, with two rows of teeth along inner distal margin; right mandible ( Fig. 3F View FIGURE 3 ) similar but without lacinia mobilis, pars incisiva finely crenulate, tip bifid. Labium ( Fig. 3G View FIGURE 3 ) wide, bilobate, distally finely setose. Maxillule ( Fig. 3H View FIGURE 3 ) with nine distal spines, setose outer margin, and row of setules on inner distal face; palp distinct, with two distal setae. Maxilla not seen. Maxilliped ( Fig. 3I View FIGURE 3 ) palp first article naked, second article with one outer and three inner setae, distal-most inner seta exceeding distal margin of third palp article; third article with inner row of eight setae, fourth article with inner to distal row of eight finely pinnate setae and one subdistal finely-pinnate seta; basis with six distal setae, outer setae longest and extending to third palp article; each endite distally with single outer seta and three elongate spatulate spines. Epignath ( Fig. 3J View FIGURE 3 ) elongate, slender, setose.

Cheliped ( Fig. 4 View FIGURE 4 ) stout; coxal sclerite with two outer setae; basis 1.8 times as long as wide, with mesial dorsodistal slender tubercle bearing seta; merus triangular with 10 to 12 ventral setae; carpus 1.3 times as long as wide, outer margin extended ventrodistally and distally to form cuff around base of propodus, with paired ventral submarginal setae, inner ventral and distal margin with three setae; propodus about as long as wide, outer distal margin extended into apophysis bearing strong seta, inner comb-row of four spines with adjacent microtrichia; fixed finger 0.8 times as long as propodus, with two ventral setae and three inner setae, cutting edge crenulate, terminal spine subdistal; dactylus simple with proximal seta less than half as long as dactylus.

Pereopod 1 ( Fig. 5A View FIGURE 5 ) longer than other pereopods, coxa with long seta; basis curved, 3.3 times as long as wide, with dorsoproximal seta longer than basis width; ischium one-third as long as wide with one seta; merus less than half as long as basis, with one ventrodistal seta; carpus 1.5 times as long as merus, with five distal setae, longest of which is 0.9 times length of propodus; propodus just longer than carpus, with one ventral and three dorsal subdistal setae; dactylus slender, with dorsoproximal seta exceeding tip of dactylus, slender unguis 1.8 times as long as dactylus, the two together 1.5 times as long as propodus.

Pereopod 2 ( Fig. 5B View FIGURE 5 ) more compact than pereopod 1; basis 2.5 times as long as wide, naked; ischium with two setae; merus about one-quarter as long as basis, with small ventrodistal seta; carpus just longer than merus, with single dorsodistal and longer ventrodistal setae, and possible indication of fine ventrodistal rounded spinule; propodus 1.5 times as long as carpus, with ventral microtrichia and dorsal subdistal seta as long as propodus; dactylus shorter than unguis, with dorsal seta, both together 0.8 times as long as propodus. Pereopod 3 similar to pereopod 2.

Pereopod 4 ( Fig. 5C View FIGURE 5 ) coxa fused; basis stout, 1.7 times as long as wide, naked; ischium compact, with two ventrodistal and two inner-distal setae; merus 0.4 times as long as basis, with one ventrodistal seta on each side and ventral microtrichia; carpus with one ventrodistal and paired outer and inner distal molariform spines and ventral microtrichia; propodus with paired (?) ventrodistal molariform spines and three dorsodistal setae, two of which are as long as dactylus plus unguis; dactylus and unguis fused into an claw, curved, dorsally with proximal and distal setules and mid-dorsal denticle. Pereopod 5 as pereopod 4. Pereopod 6 ( Fig. 5D View FIGURE 5 ) as pereopod 4, but propodus with four dorsodistal setae.

Pleopods ( Fig. 5E View FIGURE 5 ) all alike, with single dorsal plumose seta on basis; all setae on rami plumose; endopod with single inner plumose seta, and shorter, stouter distal outer seta with bent tip; proximal outer seta on each ramus slightly separated from others.

Uropod ( Fig. 5F View FIGURE 5 ) basis naked; exopod of two segments, just longer than proximal endopod segment, outer distal seta longer than inner distal seta; endopod of six segments each about twice as long as wide or longer.

Male ( Fig. 2E, F View FIGURE 2 ) as described in Bamber (2008). Similar to K. cheiris male; cheliped with no carpal apophysis, but with mid-ventral propodal apophysis, and comb-row of eight spines; posterior dactyli without distal setules.

Remarks. The female of Konarus straddi was originally attributed to K. cheiris on the basis of its gross appearance without dissection; the realization of its distinct male resulted in the closer examination of the female, which has proven to be quite different, in some cases from any other leptocheliid.

The presence of mesial and ventral rows of spinules on antennal article 2 is unique in the subfamily, and the presence of four setae on the ischia of the posterior pereopods unique in the sub-order Tanaidomorpha . K. straddi also differs from the other two described species of the genus in having the third antennular article shorter than the second article, in being without the dorsal flange on the second peduncle article of the antenna, in having six (as opposed to five) distal setae on the maxilliped basis, and in the much longer coxal seta on pereopod 1; the dorsal subdistal seta on the propodus being as long as that propodus on pereopods 2 and 3 is found in K. cheiris but not in K. crassicornis . It has the most compact habitus of the three species.

Differences between the males of this species and of K. cheiris are mentioned above.