Kalliapseudes syntresis, Drumm & Heard, 2011

DRUMM, DAVID T. & HEARD, RICHARD W., 2011, Systematic revision of the family Kalliapseudidae (Crustacea: Tanaidacea), Zootaxa 3142 (1), pp. 1-172 : 117-123

publication ID	https://doi.org/ 10.11646/zootaxa.3142.1.1
persistent identifier	https://treatment.plazi.org/id/AF5F87C3-DE1F-FF8D-B19F-C60BFA8490E3
treatment provided by	Felipe
scientific name	Kalliapseudes syntresis
status	sp. nov.

Treatment

Kalliapseudes syntresis View in CoL n. sp.

( Figs 76–79 View FIGURE 76 View FIGURE 77 View FIGURE 78 View FIGURE 79 )

Material examined. Holotype, adult female ( MV J66654 View Materials ); allotype, adult male ( NMV J61795 View Materials ); paratypes: 16 adult females (1 partly dissected), 12 adult males (1 partly dissected), 16 juveniles ( NMV J61796 View Materials ), Bass Strait, Melbourne, Australia, 37°01'S, 144°55'E, 16.5 m, coll. July 12, 1999, grab; paratypes: 4 ovigerous females, 6 females with oostegites, 4 males, 2 juveniles, 1 manca ( MV J15678 View Materials ), Bass Strait, Tasmania, 43°11'S, 147°16'E; paratypes: 1 ovigerous female, 2 females with oostegites, 1 male, 3 juveniles ( MV J15679 View Materials ), Bass Strait , Tasmania, GoogleMaps

Diagnosis (female and male). Rostrum rounded. Pleotelson with several lateral, dorsal and posterior simple setae and with slightly indented tip. Antennule with accessory flagellum of three articles, proximal articles of main flagellum (male) with several aesthetascs decreasing in number distally, and first peduncle article lacking ventral spiniform setae. Antenna third peduncle article with two plumose setae on inner margin; flagellum with six articles, articles 2 and 3 with several pectinate setae on outer margin. Labrum lacking cusps. Cutting edge of the male cheliped fixed finger with distal tooth. Cheliped and pereopod 1 exopodite with three plumose setae (one short and two long). Pereopod 1 basis with several subdistal simple setae on or near ventral margin. Pereopods 2 and 3 dactylus with more than five aestetascs on proximal digitiform lobe. Pereopods 4 and 5 dactylus with more than 10 aesthetascs. Pereopod 5 propodus with short bipinnate setae on inner and outer surfaces. Pereopod 6 propodus with one spiniform seta on inner surface near dactylus insertion, dactylus with one subterminal seta; male dactylus approximately as long as carpus and propodus combined. Uropod basal article approximately 2.3 times as long as broad.

Etymology. Syntresis (Gr.) = channel, passage, strait. The name reflects the locality (Bass Straits).

Description. Adult female with oostegites. Body ( Fig. 76A View FIGURE 76 ): length approximately 2.5 mm, 5.3 times as long as broad.

Carapace ( Fig. 76A View FIGURE 76 ). Broader than long, one pair of mid–lateral setae and one pair of shorter dorsal setae; rostrum rounded.

Pereonites ( Fig. 76A View FIGURE 76 ). Pereonites 4 and 5 longest and pereonite 6 shorter than others, all rounded laterally; at least one pair of anterolateral setae; hyposphaenia present on all pereonites.

Pleon ( Fig. 76A View FIGURE 76 ). Pleonites subequal; rounded epimera, with several plumose setae (only bases illustrated on first two and last two pleonites) and one pair of simple setae on lateral margin and dorsal surface; hyposphaenia present on all pleonites. Pleotelson ( Fig. 85B View FIGURE 85 ) longer than last three pleonites combined, rounded, narrowing posteriorly to slightly indented tip, with several lateral, dorsal and posterior simple setae.

Antennule ( Fig. 76C View FIGURE 76 ). First peduncle article approximately 2.7 times as long as second and third articles combined and approximately 2.3 times as long as maximum width, with some simple setae on inner margin and several simple and broom setae on outer margin. Second peduncle article approximately 3.8 times shorter than first article, with several simple and broom setae. Third and fourth peduncle articles subequal. Outer flagellum shorter than peduncle, with 10 articles, one aesthetasc on articles 5, 6 and 8. Inner flagellum with three articles, last article with three terminal simple setae.

Antenna ( Fig. 76D View FIGURE 76 ). First peduncle article with medial extension bearing five plumose setae. Second peduncle article naked and squama with five long simple setae. Third peduncle article with two plumose setae on inner margin. Peduncle article 4 (last) longer than flagellum, with double row of plumose setae. Flagellum with six articles, articles 2 and 3 with several pectinate setae and one or two plumose setae.

Labrum (not illustrated). Without cusps.

Mandibles ( Figs. 76E–G View FIGURE 76 ). Left mandible ( Fig. 76E View FIGURE 76 ): incisor process with approximately eight teeth; lacinia mobilis with approximately nine teeth; spine row with five spiniform setae. Right mandible not examined. Palp with terminal spiniform seta.

Labium (not illustrated). Palp with long hair–like setae on margins; ending in short acuminate inner tip.

Maxillule (not illustrated). Inner endite bearing four terminally setulate setae and dense rows of hair–like setae on outer and inner margins. Outer endite with 11 long and one short spiniform setae, two subterminal setae and dense rows of hairs on outer and inner margins.

Maxilla (not examined).

Maxilliped (not illustrated). Basal article fringed with plumose setae on outer margin, inner margin naked. First article of palp with several simple setae on inner distal/subdistal margin and one short simple seta on outer distal margin. Last three articles of palp with double row of long plumose setae on inner margin; second article with one simple seta on outer distal corner. Endite with approximately 11 pappose setae along margin and one long simple and several pappose distal setae; two coupling hooks.

Cheliped ( Figs. 76H View FIGURE 76 , 77A View FIGURE 77 ). Basis with several simple setae on or near ventral margin. Merus longer than broad, with four distal simple setae and one short simple seta on ventral margin. Carpus approximately 4.3 times as long as broad, with double row of long, plumose setae ventrally and one short simple seta on dorsodistal corner. eral simple setae. Dactylus with four simple setae on outer surface and with three simple setae midway on inner surface; cutting edge with several setae increasing in length distally and interspersed with one to several short protuberances; unguis present. Exopodite with three plumose setae.

Pereopod 1 ( Figs. 77B–D View FIGURE 77 ). Basis approximately 2.5 times as long as broad, with one spiniform and several simple setae ventrodistally. Ischium with one simple seta. Merus shorter than and as broad as basis, with several simple setae distally and on ventral margin, and one spiniform seta on each distal corner. Carpus approximately 2.6 setae, one broom seta on dorsal margin. Dactylus represented by sensory organ, shorter than propodus, with several long, terminal sensory setae with two setae on inner surface; unguis absent. Exopodite with three plumose distal setae.

Pereopod 2 ( Fig. 77E View FIGURE 77 ). Basis approximately three times as long as broad, with two broom setae on dorsal margin and four simple setae on ventral margin. Ischium with two simple setae on ventrodistal corner (one long and one short). Merus approximately same length as carpus, with one ventrodistal spiniform seta, two ventral simple setae and one simple seta on outer surface. Carpus approximately 1.6 times as long as broad, with several distal simple setae, three serrate spiniform setae on ventral margin and three serrate spiniform setae on distal outer surface. Propodus approximately three times shorter than basis, with several distal simple setae, one middorsal broom seta, four ventral and one dorsodistal serrate spiniform setae, and three spiniform setae on outer surface. Dactylus shorter than basis, approximately as long as carpus and propodus combined; sensory organ present near base, with approximately nine sensory setae; unguis fused with dactylus.

Pereopod 3 ( Fig. 77F View FIGURE 77 ). Similar to pereopod 2. Carpus with five serrate spiniform setae on ventral margin.

Pereopod 4 ( Figs. 78A, B View FIGURE 78 ). Basis approximately two times as long as broad, with two proximal broom setae near dorsal margin and several subdistal simple setae. Ischium with two simple setae on ventrodistal corner. Merus outer surface, eight serrate spiniform setae on inner surface, one terminal serrate spiniform seta, six short bipinnate setae on outer surface and six on inner surface, and one proximal broom seta on dorsal margin. Dactylus shorter than propodus, with tuft of approximately 13 sensory setae; unguis absent.

Pereopod 5 ( Figs. 78 View FIGURE 78 , D). Similar to pereopod 4. Carpus with seven spiniform setae on outer surface. Propodus with eight serrate spiniform setae on outer surface, four short bipinnate setae on outer surface and four bipinnate setae on inner surface.

Pereopod 6 ( Fig. 78E View FIGURE 78 ). Basis slender, approximately 3.7 times as long as broad, with six plumose setae on dorsal margin, five plumose and three simple setae on ventral margin. Ischium with five simple setae on ventral margin. Merus longer than ischium, with two plumose setae on dorsal margin and six simple setae on ventral margin. Carpus approximately 1.8 times as long as merus, with nine simple setae on ventral margin, two short simple setae near dorsal margin, and five simple setae distally on outer surface. Propodus shorter than carpus, with four spiniform setae on ventral margin, one spiniform seta on inner surface near dactylus insertion and approximately 29 short bipinnate setae. Dactylus shorter than carpus and propodus combined, with single subdistal seta and single short seta proximally on inner surface; unguis absent

Pleopods (not illustrated). Basal article with four long plumose setae. Exopodite with 19 plumose setae and endopodite with 18 plumose setae.

Uropods ( Fig. 78F View FIGURE 78 ). Basal article 2.3 times as long as broad, with several simple setae. Exopodite with three articles, distal article longest, approximately 1.5 times as long as second article, with four simple setae. Endopodite multiarticulated (exact number difficult to determine due to incomplete fusion in some articles).

Adult Male. Very similar to female but with the following differences:

Antennule ( Fig. 78G View FIGURE 78 ). Main flagellum consisting of 11 articles and several aesthetascs proximally, decreasing in number distally.

Cheliped ( Fig. 79A View FIGURE 79 ). More robust. Basis with midventral short spiniform seta. Cutting edge of fixed finger with distal triangular tooth. Ventral margin of basis, merus and propodus tuberculate.

Pereopod 6 ( Fig. 79B View FIGURE 79 ). Basis with four plumose and one simple setae on ventral margin. Merus with one plumose seta on dorsal margin and four simple setae on ventral margin. Propodus with three spiniform setae on ventral margin. Dactylus as long as carpus and propodus combined, with single subterminal seta.

Distribution. Bass Strait, Melbourne Australia and Tasmania (Fig. 1, number 31).

Remarks. Kalliapseudes syntresis n. sp. is the first known member of the genus to be recorded from the Bass Strait. Błazewicz–Paszkowycz and Bamber (Błazewicz–Paszkowycz, personal communication) are describing the tanaidacean fauna from Bass Strait and consider this material to be conspecific with K. obtusifrons . We think there are several characteristics that can separate these two species including: 1) number of articles in accessory flagellum of antennules (4 in obtusifrons and 3 in syntresis n. sp.), 2) nature of the terminal spine of the mandibular palp (pectinate in obtusifrons and smooth in syntresis n. sp.), 3) number of setae of exopodites of the cheliped and first pereopod (2 in obtusifrons and 3 in syntresis n. sp.), and 4) the dentition of the cutting edges of the female chelae appears to be different (spinules interspersed with only 1 protuberance in obtusifrons ). Also, obtusifrons lacks setae on the basis of the first pereopod, but the possibility that they were broken off cannot be ruled out since only two female specimens were available for examination. Unfortunately the male is unknown in K. obtusifrons .