Bamberus jinigudirus, Stępień, Anna & Błażewicz-Paszkowycz, Magdalena, 2013

Stępień, Anna & Błażewicz-Paszkowycz, Magdalena, 2013, Four new species and two new genera of Metapseudidae (Crustacea: Tanaidacea: Apseudomorpha) from Australian coral reefs, Zootaxa 3717 (4), pp. 559-592 : 563-569

Bamberus jinigudirus n. sp.

Figs 1–4

Material examined. Holotype: female (WAM C 54552), NR 09-70B, 22°38'30.16"S, 113°41'30.05"E, Ningaloo , wreck of Cho Fu Kumar, sand and fine rubble in groove, outer reef edge, depth 8–12 m, 26 May 2009, coll. N.L. Bruce & L. Hughes. Allotype: male (WAM C 54553), NR 09-70B, same locality as holotype. Paratypes: 5 females, 1 male (WAM C 54554), NR 09-70B, same locality as holotype; 1 male (MTQ W 34257), NR 09-64C, 22°31'2.21"S, 113°39'47.63"E, Ningaloo , wreck of Cho Fu Kumar, finger rubble on sand, outer reef edge, depth 9 m, 26 May 2009, coll. N.L. Bruce & L. Hughes; 1 female (MTQ W 34258), NIN 7E, 21°54'43.44"S, 113°57'6.30"E, Ningaloo , lagoon patch reef, southern side of reef pass, sand, edge of large coral heads (small bommies), depth 4.5–5.5 m, 8 August 2008, coll. N.L. Bruce & M. Błażewicz-Paszkowycz; 1 female (W 34259), NIN 13D, 21°51'8.88"S, 114°0'12.24"E, Ningaloo , off northern reef point, sand, adjacent to bommies, depth 8–10 m, 14 August 2008, coll. M. Błażewicz-Paszkowycz & N.L. Bruce; 3 males (WAM C 54555), 2 females (MTQ 34260), NIN 9B, 21°51'23.94"S, 114°0'9.12"E, Ningaloo , edge of northern lagoon pass, dead Acropora , depth 4–5 m, 11 August 2008, coll. M. Błażewicz-Paszkowycz & C. Hass.

Etymology. Jinigudirais is the local Aboriginal name for the Ningaloo area.

Description of female. Body ( Figs 1 A, B) 1.8 mm long, 6.9 times as long as wide. Carapace 15% of total body length, with weakly-pointed rostrum. Pereonite 1 half as long as wide, anterolateral margin adhering to carapace; pereonite 2 trapezoidal; pereonites 3 and 4 0.8 times as long as wide; pereonite 5 0.6 times as long as pereonite 4; pereonite 6 0.6 times as long as pereonite 5; pereonites with two or three setae laterally. Pleon 15% of total body length, each pleonite with ventral hyposphenium and setae laterally; pleonites 1–3 with one seta, pleonites 4 and 5 with two lateral setae; pleotelson with two setae laterally and two distally.

Antennule ( Fig. 3 B) peduncle article 1 2.7 times as long as wide, with four penicillate and three simple setae on outer margin, and with two penicillate setae and one simple seta on inner margin; article 2 0.2 times as long as article 1, bearing one simple seta on outer margin, and two simple and two penicillate setae on inner margin; article 3 0.8 times as long as article 2, with one simple seta on outer- and inner margin distally; article 4 naked; outer flagellum with five segments; segment 2 with two simple setae; segment 5 with one seta and aesthetasc; inner flagellum with two segments, both with simple setae.

Antenna ( Fig. 3 D) peduncle article 1 0.4 times as long as article 2, with rounded process bearing fine distal seta; article 2 1.4 times as long as wide, outer margin serrated, one simple seta on inner margin; squama small, little longer than wide, with three setae terminally; article 3 0.3 times longer than article 2, with one simple seta; articles 4 and 5 similar in length, each little shorter than article 2; article 4 with one penicillate seta; article 5 with two penicillate and two simple distal setae; flagellum with three segments; distal segment with three simple distal setae.

Mouthparts. Mandible palp ( Fig. 3 E) article 1 with long distal seta on inner margin; article 2 with three simple and three pinnate setae on inner margin; article 3 with four distally and two subdistally strong setae; molar process ( Fig. 3 F) serrated distally; right incisor ( Fig. 3 H) blunt, with straight edge; left incisor ( Fig. 3 G) weakly serrated, lacina mobilis present on left mandible, with four teeth and with three trifurcated and one simple setae on setiferous lobe. Labium ( Fig. 3 M) with two plumose setae terminally and with some fine setae along both margin. Maxillule outer endite ( Fig. 3 J) with ten distal spines and with two simple setae on inner margin; inner endite ( Fig. 3 K) with two fine setae distally; palp ( Fig. 3 L) with two articles; article 2 with three distal setae. Maxilla ( Fig. 3 I) outer lobe of movable endite margin serrated, with two simple subdistal (broken) and three distal setae; inner lobe of movable endite with some simple setae; outer lobe of fixed endite with numerous simple and three leaf-shaped setae distally, and one plumose seta subdistally; inner lobe of fixed endite with three teeth on margin, one plumose and three simple setae distally and row of nine setae subdistally. Maxilliped ( Fig. 3 N) basis 0.7 times as long as wide, with distal seta on inner margin; palp article 1 0.6 times as long as basis, with simple seta on inner margin; article 2 1.1 times as long as basis, with spine on outer margin, and numerous simple setae along inner margin; article 3 0.8 times as long as article 2 with numerous simple setae on inner margin; article 4 with five simple distal and one pinnate subdistal setae; endite ( Fig. 3 O) with numerous simple setae and spines along inner margin. Epignath ( Fig. 3 P) slender.

Cheliped ( Fig. 4 A) basis almost twice as long as wide, with two midventral and two distoventrally setae; exopodite with three articles; distal article with four plumose setae; merus half as long as basis, with three fine simple setae along ventral margin; carpus elongate, 2.6 times as long as wide, 1.6 times as long as merus, with two simple ventral margin and with one fine dorsal-distal seta; propodus 0.8 times as long as carpus, with some simple setae near dactylus insertion; fixed finger with three simple ventral setae and three setae on cutting edge; dactylus 0.6 times as long as propodus, with two simple setae.

Pereopod 1 ( Fig. 4 E) basis 1.3 times as long as wide, with five plumose setae along dorsal margin, and with two simple setae and one distoventral spine; exopodite with three articles; distal article with five plumose setae; ischium 0.2 times as long as wide; merus 0.7 times as long as basis, with three simple ventral setae and with two spines – distodorsal and distoventral; carpus half length of merus, with two simple setae and one distoventral spines, and with three simple setae and one distodorsal spine; propodus 0.7 times as long as merus, with two simple setae and three spines on ventral margin and with two simple setae and two spines on dorsal margin; dactylus together with unguis 0.7 times as long as propodus.

Pereopod 2 ( Fig. 4 F) basis 3.5 times as long as wide, with three simple ventral setae and with two penicillate setae and one simple seta dorsally; ischium 0.9 times as long as wide, with two simple setae and one serrated spine distoventrally; merus 0.3 times as long as basis, with one distodorsal simple seta and one simple seta and one serrated spine ventrally; carpus similar in length to merus, with three serrated spines and one simple seta ventrally, and one simple dorsal seta; propodus 1.1 times as long as carpus, with three serrated spines and one pinnate seta on ventral margin and with one plumose, one penicillate seta and one spine on dorsal margin; dactylus together with unguis 0.7 times as long as propodus.

Pereopod 3 ( Fig. 4 G) similar to pereopod 2, but ischium without spines; carpus with two serrated spines and four simple setae; propodus with two simple setae and two spines near dactylus insertion.

Pereopod 4 ( Fig. 4 H) basis 3.7 times as long as wide, with two penicillate setae and two fine setae proximally; ischium with one long distoventral seta; merus 1.3 times as long as wide, with two simple setae and serrated spine ventrally and one strong dorsal seta; carpus 1.7 times as long as merus, with three pairs of serrated ventral spines; propodus 1.7 times as long as carpus, with one plumose dorsal seta and with six thick pinnate distal setae; dactylus little longer than unguis, with small distal seta; together with unguis 0.7 times as long as propodus.

Pereopod 5 ( Fig. 4 I) basis three times as long as wide, with two penicillate setae proximally and one simple distoventral seta; ischium with two short and one long distoventral seta; merus 0.3 times as long as basis, with two ventral and one dorsal simple seta; carpus subequal to merus, with three serrated spines and one simple seta ventrally and with one serrated spine and one simple seta dorsally; propodus 1.6 times as long as carpus, with serrated midventral spine, row of simple setae along ventral margin, and with two penicillate and one pinnate setae distodorsally; dactylus together with unguis 0.6 times as long as propodus, with fine seta; unguis 0.6 times as long as dactylus.

Pereopod 6 ( Fig. 4 J) similar to pereopod 5, but basis without penicillate setae, ischium with only one, long seta; propodus with simple midventral seta and with one dorsal plumose seta as well as row of simple setae near dactylus insertion.

Pleopods ( Fig. 4 C) in five pairs, basis 1.4 times as long as wide, with simple seta distally; endopod with four distal setae and one simple, one plumose seta at midlength; exopod with two articles; article 1 with plumose distal seta; article 2 with four distal and one subdistal setae.

Uropod ( Fig. 4 D) basis 2.5 times as long as wide, with forward-bent apophysis and with five simple distal setae; endopod with 14 segments, some armored with simple setae; distal segment with four terminal setae; exopod with five segments; distal segment with three simple setae.

Description of male. Body ( Figs. 2 A, B) 1.4 mm long, eight times as long as wide. Carapace 20% of total body length. Pereonite 1 0.5 times as long as wide; pereonite 2 little shorter than pereonite 1, with one pair of setae anterolaterally; pereonites 3 to 6 similar in length, 0.6 times as long as wide, bearing two pair of lateral setae (anteriorly and posteriorly). Pleon and pleotelson similar to those of female.

Antennule ( Fig. 3 A) similar to that of female, but peduncle article 1 is 4.2 times as long as wide and article 2 is twice as long as wide; article 3 1.7 times as long as article 2.

Antenna ( Fig. 3 C) similar to that of female, but with longer peduncle articles: peduncle article 2 2.1 times as long as wide, article 3 1.2 times as long as wide, and article 4 and 5 are similar in length, and twice as long as wide.

Cheliped ( Fig. 4 B) left and right the same size, much stronger than that of female; propodus wide and flat, 0.8 times as long as wide, with two setae ventrally; fixed finger with two, large apophysis and row of simple setae on inner margin and four setae ventrally; dactylus inner margin serrated.

Subfamily Synapseudinae Gu t u, 1972

Remarks. According to the diagnosis of Gutu (1972), the Synapseudidae includes metapseudids with fused pleonites. Two of the genera, Cryptapseudes Băcescu, 1976 and Curtipleon Băcescu, 1976 , have all the pleonites fused with the pleotelson into one solid segment, while two others - Vicinisyndes Gutu 2007 and Creefs n. gen - have only one free pleonite.

The number of pleonites fused with pleotelson varies in members of Synapseudes ( Table 4 ). Usually members of this genus have two or three free pleonites, but the Subantarctic S. ideos Gardiner, 1973 has two fully-developed pleonites, the other three being apparently partially fused with the pleotelson. Another exception is S. shiinoi Riggio, 1973 that has only one free pleonite. Within the genus, these two species have also an unusual number of segments in both flagella of the antennule, a different number of articles in the antenna, unusual setation of the mandible palp, and a distinct number of segments in both rami of the uropods. A revision of the genus is beyond the scope of this paper but in all probability S. ideos and S. shiinoi are representatives of two distinct genera.

Figures

FIGURE 1. Bamberus jinigudirus n. gen n. sp., holotype female. A body dorsal view; B body lateral view. Scale line = 1 mm.

FIGURE 2. Bamberus jinigudirus n. gen n. sp., male. A body dorsal view; B body lateral view. Scale line = 1 mm.

FIGURE 3. Bamberus jinigudirus n. gen n. sp., A antennule (male); B antennule (female); C antenna (male); D antenna (female); E palp of right mandible; F molar process; G left mandible; H incisor of right mandible; I maxilla; J maxillule outer endite; K maxillule inner endite; L palp of maxillule; M labium; N maxilliped; O maxillipedal endite. Scale line = 0.1 mm.

FIGURE 4. Bamberus jinigudirus n. gen. n. sp., A cheliped (female); B cheliped (male); C pleopod; D uropod; E pereopod 1; F pereopod 2; G pereopod 3; H pereopod 4; I pereopod 5; J pereopod 6. Scale line = 0. 1 mm.