Kalliapseudes profundus, DRUMM, DAVID T. & HEARD, RICHARD W., 2011

DRUMM, DAVID T. & HEARD, RICHARD W., 2011, Systematic revision of the family Kalliapseudidae (Crustacea: Tanaidacea), Zootaxa 3142 (1), pp. 1-172 : 107-113

publication ID	https://doi.org/ 10.11646/zootaxa.3142.1.1
persistent identifier	https://treatment.plazi.org/id/AF5F87C3-DE01-FF87-B19F-C233FAE39784
treatment provided by	Felipe
scientific name	Kalliapseudes profundus
status	sp. nov.

Treatment

Kalliapseudes profundus View in CoL n. sp.

( Figs 69–72 View FIGURE 69 View FIGURE 70 View FIGURE 71 View FIGURE 72 )

Material examined. Holotype, adult female ( ZMH K–41976); allotype, adult male ( ZMH K–41977); paratypes: 3 adult females and 1 adult male ( ZMH K–42409); Northwest Africa, 21°22.5'N, 17°34.3'W, 429 m. GoogleMaps

Diagnosis (adult female and male). Rostrum rounded. Pereonites 2–6 with anterolateral protuberance. Pleotelson tapering posteriorly to rounded tip with the posterior margin with row of simple setae and without two long terminal plumose setae. Antennule first peduncle article lacking ventral spiniform setae; accessory flagellum of two articles; main flagellum of female with five aesthetascs, male with clusters of aesthetascs on proximal articles and decreasing in number distally. Antenna first peduncle article with two simple setae (one long and one short) on outer distal corner; third peduncle article with one plumose seta on inner margin. Labrum complex lacking cusps. Terminal spiniform seta of mandibular palp approximately 3.3 times as long as broad. Female cheliped fixed finger and dactylus cutting edge with spinules not interspersed with round tubercles. Male cheliped fixed finger cutting edge with large rounded tooth. Cheliped and pereopod 1 exopodite with three plumose setae. Pereopod 1 propodus with 10 ventral spiniform setae. Pereopods 2 and 3 propodus with very stout pectinate spiniform seta subdistally on the inner surface; dactylus with digitiform lobe bearing more than five aesthetascs. Pereopods 4 and 5 propodus with several terminal long, bipinnate setae. Pereopod 6 propodus with two or three spiniform setae on outer surface; pereopod 6 dactylus with distinctive short simple seta on dorsal margin. Female pereopod 6 dactylus with two or three subterminal setae. Male pereopod 6 dactylus shorter than carpus and propodus combined, with at least one subterminal seta. Uropod basal article approximately 2.8 times as long as broad; exopodite with three articles, last article approximately 2.5 times as long as second article.

Etymology. Profundus (L.) = deep. The name alludes to the deep water habitat of this species.

Description. Adult female with oostegites. Body ( Fig. 69A View FIGURE 69 ): length approximately 8.5 mm, 5.5 times as long as broad.

Carapace ( Fig. 69A View FIGURE 69 ). Slightly broader than long, one pair mid–lateral and two pairs dorsal setae; rostrum rounded.

Pereonites ( Fig. 69A View FIGURE 69 ). Pereonites 2–6 with anterolateral protuberance. Pereonites 4 and 5 longer than others and pereonite 6 shortest; one pair anterolateral and at least one pair anterodorsal setae; hyposphaenia present on all pereonites.

Pleon ( Fig. 69A View FIGURE 69 ). Pleonites subequal; rounded epimera, with several plumose setae, two pairs dorsolateral simple setae; hyposphaenia present on all pleonites. Pleotelson longer than last two pleonites combined, tapering posteriorly to rounded tip, with several short dorsal, lateral and posterior simple setae.

Antennule ( Fig. 69B View FIGURE 69 ). First peduncle article approximately 2.7 times as long as second and third articles combined and approximately 3.3 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 4.2 times shorter than first article, with several simple and broom setae. Third and fourth articles subequal (including common article). Outer flagellum shorter than first peduncle article, with nine articles, one aesthetasc on articles 3, 4, 5, 7 and 8. Inner flagellum with two articles, last article with four terminal setae (three simple and one broom).

with six simple setae. Third peduncle article with one plumose seta on inner margin. Peduncle article 4 (last) nearly same length as flagellum, with double row plumose setae, two proximal and one distal broom setae. Flagellum with six articles, articles 2 and 3 with several bipectinate setae.

mandible; E, right mandible; F, mandibular palp; G, labium. Scale bars: A = 1.0 mm; B, C, F = 0.2 mm; D, E, G = 0.05 mm.

Labrum (not illustrated) concave and with numerous posterior hair–like setae. Lacking cusps.

Mandibles ( Figs. 69D–F View FIGURE 69 ). Left mandible ( Fig. 69D View FIGURE 69 ): incisor process and lacinia mobilis with approximately 10 teeth; spine row with four spiniform setae. Right mandible ( Fig. 69E View FIGURE 69 ) incisor process with two large teeth and

Labium ( Fig. 69G View FIGURE 69 ). Palp with long hair–like setae on margins and terminating in short acuminate tip.

Maxillule ( Fig. 70A View FIGURE 70 ). Inner endite bearing four terminally setulate setae and dense rows of hair–like setae on outer and inner margins. Outer endite with 10 long and one short spiniform setae, two subterminal setae and dense rows of hair–like setae on outer margin.

Maxilla ( Fig. 70B View FIGURE 70 ). Inner lobe of fixed endite with posterior row of five serrate setae and with long anterior row of setae. Outer lobe of fixed endite with four distal serrate and several simple and pectinate setae, and one short serrate spiniform seta on posterior face. Inner lobe of moveable endite with several simple and pectinate setae. Outer lobe of moveable endite with three pectinate and two plumodenticulate (bearing proximal setules and distal denticles). Inner margin spinulate.

Maxilliped ( Fig. 70C View FIGURE 70 ). Basal article fringed with plumose setae on outer margin, inner margin naked. First article of palp with several simple setae. Last three articles of palp with double row of long plumose setae on inner margin; second article with two simple setae on outer distal corner. Endite with nine pappose setae along margin and one long simple and several pappose distal setae; two coupling hooks.

Cheliped ( Fig. 70D View FIGURE 70 ). Basis with several simple setae near ventral margin. Merus longer than broad, with four distal simple setae (two long and two short). Carpus approximately 4.3 times as long as broad, with double row of long, plumose setae and several simple setae near dorsal margin. Propodus with diagonal row of long, plumose setae on inner face; fixed finger with several simple setae proximal to distal unguis; cutting edge with numerous (> 10) spinules; palm with several distal simple setae. Dactylus with three simple setae on inner surface; cutting edge with several spinules increasing in length distally (> 10). Exopodite with three plumose setae (two long and one short).

Pereopod 1 ( Fig. 70E View FIGURE 70 ). Basis approximately 2.5 times as long as broad, with several simple setae ventrally. Ischium with two simple setae. Merus approximately as long and broad as basis, with several simple setae on ventral margin, and one spiniform seta on each distal corner. Carpus approximately 2.6 times shorter than merus, with several simple setae and two ventrodistal and one dorsodistal spiniform setae. Propodus approximately same length as carpus, with several simple setae and ten ventral and two dorsal serrate spiniform 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 setae (two long and one short).

Pereopod 2 ( Figs. 70F, G View FIGURE 70 ). Basis approximately 3.8 times as long as broad, with two broom setae on dorsal margin and several simple setae on ventral margin. Ischium with two ventrodistal simple setae. Merus shorter than carpus, with one simple seta on outer surface and one spiniform seta ventrodistally. Carpus approximately 1.8 times as long as broad, with several simple setae distally, and six spiniform setae (two ventral and four on outer surface). Propodus approximately 3.8 times shorter than basis, with several distal simple setae, one dorsal broom seta, four ventral and one dorsodistal spiniform setae, four spiniform setae on outer surface, and one stout pectinate spiniform seta (Fig.) on inner surface. Dactylus shorter than basis, approximately same length as carpus and propodus combined; digitiform lobe with approximately seven sensory setae; unguis fused with dactylus.

Pereopod 3 ( Fig. 71A View FIGURE 71 ). Similar to pereopod 2. Carpus with seven spiniform setae. Propodus with six ventral spiniform setae. Dactylus digitiform lobe with approximately eight sensory setae.

Pereopod 4 ( Figs. 71B, C View FIGURE 71 ). Basis approximately three times as long as broad, with three proximal broom setae and several subdistal simple setae. Ischium with two ventrodistal simple setae. Merus shorter than carpus, with several simple and two spiniform setae. Carpus with six spiniform setae on inner surface and six spiniform setae on outer surface. Propodus with nine serrate spiniform setae on outer surface, 10 serrate spiniform setae on inner surface, one dorsodistal serrate spiniform seta, several long distal bipinnate setae, and one proximal broom seta on dorsal margin. Dactylus shorter than propodus, with tuft of approximately seven sensory setae and one simple seta midway on dorsal margin; unguis absent.

Pereopod 5 ( Figs. 71D, E View FIGURE 71 ). Similar to pereopod 4. Carpus with seven spiniform setae on inner and outer surfaces. Dactylus with tuft of six sensory setae.

Pereopod 6 ( Figs. 71F View FIGURE 71 , 72A View FIGURE 72 ). Basis slender, approximately 4.6 times as long as broad, with eight plumose setae on dorsal margin, six plumose and six simple setae on ventral margin and one proximal broom seta on outer surface. Ischium with six simple setae on ventral margin. Merus longer than ischium, with three plumose setae on dorsal margin and seven simple setae on ventral margin. Carpus approximately two times as long as merus, with 12 form setae on ventral margin, 35 short bipinnate setae and three spiniform setae on outer surface near dactylus insertion. Dactylus approximately same length as propodus, with three subterminal setae and one seta midway on dorsal margin; unguis absent.

Pleopods ( Fig. 72B View FIGURE 72 ). Basal article with four long plumose setae. Exopodite with 21 plumose setae and endopodite with 28 plumose setae.

pod 4 (outer); D, pereopod 5 (outer); E, pereopod 5 (inner); F, pereopod 6 (inner). Scale bars = 0.2 mm.

Uropods ( Fig. 72C View FIGURE 72 ). Basal article approximately 2.8 times as long as broad, with several subdistal simple setae. Exopodite with three articles, last article approximately 2.5 times as long as second article, with four terminal simple setae. Endopodite (exact number of articles difficult to determine due to incomplete fusion in some articles).

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

Antennule ( Fig. 72D View FIGURE 72 ). Proximal articles of main flagellum with cluster of aesthetascs, decreasing in number distally.

Cheliped ( Fig. 72E View FIGURE 72 ). More robust. Cutting edge of fixed finger with large, rounded tooth.

Pereopod 6 ( Fig. 72F View FIGURE 72 ) Propodus with 12 long spiniform setae. Dactylus longer than carpus but shorter than carpus and propodus combined, with single subterminal seta.

Distribution. NW Africa, Eastern Atlantic, 429 m depth (Fig. 1, number 29).

Intraspecific variation. A few other adult females that were examined had an antenna with four plumose setae on the medial extension and five simple setae on the squama.

Remarks. Kalliapseudes profundus n. sp. is the first member of the family Kalliapseudidae to be recorded at a depth greater than 300 m. It can be differentiated from the other congeners by two unique characteristics: 1) anterolateral protuberances on pereonites 2–6, and 2) long bipinnate setae on pereopods 4 and 5 propodus (the other species have short bipinnate setae). It can further be distinguished from the eastern Atlantic congeners by having spiniform setae on the outer surface of the pereopod 6 propodus (the other species have long simple setae).