Parafilitanais denticulus, Larsen, Kim, 2013
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publication ID |
https://doi.org/ 10.11646/zootaxa.3694.4.5 |
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publication LSID |
lsid:zoobank.org:pub:0547EBDB-8A08-4F0F-8902-7B928A0E5EBD |
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DOI |
https://doi.org/10.5281/zenodo.6151047 |
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persistent identifier |
https://treatment.plazi.org/id/1E49A048-5469-9600-FF5A-EAA1FD80FBB0 |
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treatment provided by |
Plazi |
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scientific name |
Parafilitanais denticulus |
| status |
sp. nov. |
Parafilitanais denticulus View in CoL n. sp.
( Figs. 3 View FIGURE 3 & 4 View FIGURE 4 )
Material examined. Holotype: non-ovigerous female (Reg. # ZMH K-43956), ANDEEP- SYSTCO, DZMB-HH 1338, station 17, 70 °04.83’S, 03°21.50’W, 2051.4 m, 14 March 2002, EBS-epi. Paratypes (Reg. # ZMH K-43957) one non-ovigerous female (dissected), same data as holotype. One non-ovigerous female ANDEEP- SYSTCO, DZMB-HH 1424, same locality. One non-ovigerous female ANDEEP- SYSTCO, DZMB-HH 1602, same locality.
Diagnosis. Antennule article 1 longer than rest of antennule combined; article 4 l/w ratio 2. Maxilliped palp article 2 with blunt denticle-shaped outer setae. All pereopods with meral and carpal bayonet setae. Pereopods 1 to 3 merus and carpus with bayonet setae; propodus with distal spines. Uropodal endopod article 2 shorter than half of article 1.
Etymology. Named after the diagnostic blunt denticle-shaped outer setae on the maxilliped article 2.
Description. Body from holotype (1.8 mm), appendages from adult female paratype.
Body ( Fig. 3 View FIGURE 3 A, B). Elongated, nine times as long as broad. Cephalothorax shorter than combined length of pereonite I and 2. Eyelobes absent. Pereonites l and 2 wider than long. Pereonites 4 and 5 longer than wide. Pereonite 6 as wide as long. All pleonites subequal, slightly narrower than pereon and one third as long. Pleotelson longer than two pleonites combined, apex blunt, with two pairs of small setae.
Antennule ( Fig. 3 View FIGURE 3 C). Shorter than cephalothorax. Article 1 longer than rest of antennule, with one simple and setulated distal setae. Article 2 about one third as long as article 1, with one simple and one setulated distal setae. Article 3 square, with two simple distal setae. Article 4 longer and thinner than article 3, with five distal setae and one aesthetasc.
Antenna ( Fig. 3 View FIGURE 3 D). More than half as long as antennule. Article 1 broken but fused to cephalothorax. Article 2 longer but wider than article 3, naked (possibly an artefact as we would expect a dorsal seta here). Article 3 square, naked. Article 4 longer than other articles, with three distal setae. Article 5 as long as article 2, with one simple distal seta. Article 6 minute with two long and one short distal setae.
Mouthparts. Labrum ( Fig. 3 View FIGURE 3 E) hood-shaped, setulose. Mandibular molar process pointed and longer than incisor. Left mandible ( Fig. 3 View FIGURE 3 F) lacinia mobilis reduced to a short process which appears at least partly fused with mandibular body (possibly a result of mandible orientation); incisor with two blunt denticles. Right mandible ( Fig. 3 View FIGURE 3 G) incisor narrow and only minutely bifurcate (hardly visible). Labium ( Fig. 3 View FIGURE 3 H) lobes naked, with small lateral expansion. Maxillule ( Fig. 3 View FIGURE 3 I) endite with eight distal spiniform setae. Palp with two long apical setae. Maxilla not recovered. Maxilliped ( Fig. 3 View FIGURE 3 J) endite with outer and inner unarticulated processes. Basis fused and naked. Palp article 1 naked. Article 2 with two setae on inner margin and blunt spiniform outer seta. Article 3 with three inner setae. Article 4 with three distal and one small outer setae. Epignath ( Fig. 3 View FIGURE 3 K) with blunt apex.
Cheliped ( Fig. 4 View FIGURE 4 A). Basis divided unequally by elongated sclerite, as long as carpus, with one dorsodistal seta. Merus triangular with one ventral seta. Carpus marginally shorter than propodus including the fixed finger, with ventral process bearing two setae, dorsodistally with small seta. Propodus naked. Fixed finger with three inner and two ventral setae, with sharp inner distal process. Dactylus marginally longer than fixed finger.
Pereopod 1 ( Fig. 4 View FIGURE 4 B). Coxa with one seta. Basis as long as three succeeding article combined, naked. Ischium with one small ventral seta. Merus longer than carpus, widening distally and with one ventrodistal bayonet seta. Carpus two thirds as long as propodus, with one dorsodistal bayonet seta. Propodus longer than half of basis, with two ventrodistal spiniform setae and several distal spines. Dactylus and unguis combined shorter than propodus. Dactylus with small ventrodistal spine. Unguis with bifid apex.
Pereopod 2 ( Fig. 4 View FIGURE 4 C) and 3 (Fig. D). As pereopod 1 except: coxa naked. Carpus with both dorso- and ventrodistal bayonet setae.
Pereopod 4. ( Fig. 4 View FIGURE 4 E). Coxa with one seta. Basis as long as three succeeding article combined, naked. Ischium with one small ventral seta. Merus shorter than carpus, widening distally and with two ventrodistal bayonet setae. Carpus two thirds as long as propodus, with two distal bayonet setae and bone-shaped seta. Propodus shorter than half of basis, with three distal spiniform setae. Dactylus and unguis combined longer than propodus. Dactylus with small ventrodistal spine.
Pereopod 5 ( Fig. 4 View FIGURE 4 F). As pereopod 4 except: propodus broken.
Pereopod 6. Not recovered.
Pleopods. Not present in female.
Uropods. ( Fig. 3 View FIGURE 3 L). Basal article more than half the length of endopod article 1, naked. Endopod article 1 more than twice as long as article 2, with one setulose distal setae; article 2 with five simple distal setae. Exopod completely reduced.
Remarks. The blunt denticle-shaped outer seta on the maxilliped palp article 2 is unique to this species. It can furthermore be separated from P. vadosus BłaŻewicz-Paszkowycz & Bamber, 2012 by the much longer antennule article 1 and much shorter article 4, the almost twice as long cheliped carpus, and the presence of bayonet setae on the merus and carpus of pereopods 2 and 3. From P. caudatus Kudinova-Pasternak, 1989 , P. similis Kudinova- Pasternak, 1990 and P. mexicanus Larsen, 2002 the new species can also be distinguished by the uropodal endopod article 2 being shorter than half of article 1.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.