Ciplakastacus mersinensis, Sak & Karaytuğ & Huys, 2008
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publication ID |
https://doi.org/ 10.1080/00222930802277632 |
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persistent identifier |
https://treatment.plazi.org/id/FC3D124B-FFC0-4309-89AE-D88D3B19F647 |
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treatment provided by |
Felipe |
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scientific name |
Ciplakastacus mersinensis |
| status |
sp. nov. |
Ciplakastacus mersinensis sp. nov.
( Figures 1–5 View Figure 1 View Figure 2 View Figure 3 View Figure 4 View Figure 5 )
Type locality
Turkey, Mediterranean coast, Mersin Province; İncekum beach, 400 m east of the NATO harbour (36 ° 17.0949N, 33 ° 49.9289E); for chemical and physical parameters see Table 1 GoogleMaps .
Material examined
Holotype ♀ dissected on seven slides ( NHM reg. no. 2008.620) . Paratypes: (1) collected on 10 April 2007: two ♀♀ dissected on four and nine slides, respectively ( MUZM) , one „ dissected on eight slides ( NHM reg. no. 2008.621), 20 ♀♀ and four „„ preserved in alcohol ( NHM reg. no. 2008.622–645), 50 ♀♀ and five „„ preserved in alcohol ( MUZM); (2) collected on 27 July 2007: 15 ♀♀ and 30 „„ preserved in alcohol ( NHM reg. no. 2008.646–690), 45 ♀♀ and 47 „„ preserved in alcohol ( MUZM); (3) collected on 27 November 2007: four ♀♀ and 60 „„ preserved in alcohol ( NHM reg. no. 2008.691– 754), three ♀♀ and 105 „„ preserved in alcohol ( MUZM) . All material collected from the type locality by S. Sak, A. Alper and S. Sönmez .
Description of female
Body ( Figure 1A, B View Figure 1 ). Total body length from tip of rostrum to posterior margin of caudal rami 548Mm (holotype NHM reg. no. 2008.620) (458–565 Mm; mean 500 Mm; n 520). Largest width measured at posterior margin of P5-bearing somite. Body slender, cylindrical, without clear demarcation between prosome and urosome. Integument of rostral area, cephalic shield and body somites smooth, moderately chitinized. Body surface with sensillar pattern as figured. Hyaline frills smooth and plain on cephalothorax and thoracic somites; those of genital double-somite and free abdominal somites incised, forming rectangular lappets. Cephalic shield subrectangular with anterior corners rounded. Pleural areas of cephalothorax and thoracic somites weakly developed. Intersomitic membranes distinct. Genital double-somite longer than wide; without traces marking original segmentation; with paired dorsolateral chitinous reinforcements (muscle attachments). Anal somite ( Figure 2A View Figure 2 ) about 1.2 times longer than wide; with spinular rows either side of ventral midline in anterior third and near posterior margin; anal operculum weakly developed, rounded ( Figure 2C View Figure 2 ); anal opening flanked by conspicuous, backwardly directed, serrate extensions ( Figure 2B, C View Figure 2 ).
Caudal rami ( Figure 2B, C View Figure 2 ). Elongate, about 2.9 times longer than wide, tapering posteriorly, outer distal corner produced into backwardly directed, dorsally recurved spinous process; with seven setae (indicated by Roman numerals I–VII in Figure 2B, C View Figure 2 ). Seta I well developed, flanked by dorsal and ventral elongate spinule; setae II and IV slender and bare; seta III vestigial, displaced onto posterior spinous process; seta V long with fracture plane; seta VI small; seta VII slender, located dorsally, triarticulate at base. Outer margin of spinous process with a pore.
Antennule ( Figure 3A View Figure 3 ). Seven-segmented; long and slender; sclerite small, visible at base. Segment 1 very short, with small tube-pore on dorsal surface. Segment 2 longest, about 3.7 times longer than wide. Segment 4 with long aesthetasc (length582 Mm) fused basally to a slender seta. All setae naked and slender except for long plumose seta on segment 2. Apical acrothek consisting of an aesthetasc (length523 Mm) and two slender setae. Armature formula 1-[1], 2-[8+1 plumose], 3-[5], 4-[1+(1+ae)], 5-[1], 6-[3], 7-[7+acrothek].
Antenna ( Figure 3B, C View Figure 3 ). Coxa small. Basis completely fused to proximal endopod segment forming elongate allobasis with two rows of tiny spinules along abexopodal margin and with two spinule rows near base of exopod. Exopod one-segmented; with two apical pinnate setae and a subapical tubular seta. Endopod with a tiny spinular row in proximal third and with surface frill distally; lateral armature consisting of two spines and a minute seta; distal armature consisting of two bipinnate spines and three geniculate setae (longest one fused basally to vestigial seta and bearing strong spinules around geniculation); outer distal corner with tube pore.
Labrum ( Figure 4B View Figure 4 ). Large; free margin slightly concave, with spinules subdistally on anterior surface, posterior surface with overlapping rows of spinules medially and spinular rows laterally.
Mandible ( Figure 4C, D View Figure 4 ). Coxa robust, gnathobase with naked seta at dorsal corner and several multicuspidate teeth around distal margin. Palp uniramous, comprising
basis and one-segmented endopod. Basis with one seta; endopod with one lateral, two subapical and two basally fused apical setae.
Paragnaths ( Figure 4E View Figure 4 ). Paired, not fused medially; represented by well-developed lobes with spinule rows along outer margin and series of overlapping spinules around distal inner margin (distalmost one distinctly larger; arrowed in Figure 4E View Figure 4 ).
Maxillule ( Figure 4F, G View Figure 4 ). Praecoxa with a spinule row on posterior surface; arthrite with two tubular setae on anterior surface, a spinule row on posterior surface and 10 elements around distal margin. Coxal endite small, cylindrical with one unipinnate spine and one naked seta. Basis elongate ( Figure 4G View Figure 4 ), with closely set endites; with apical unipinnate spine and five setae (two of which fused at base) around distal margin. Rami completely incorporated into basis; exopod and endopod represented by two and three setae, respectively. Praecoxal arthrite partly concealing coxa but not markedly rotated as in most other leptastacid genera.
Maxilla ( Figure 4H View Figure 4 ). Syncoxa with two minute spinular rows and two closely-set, cylindrical endites; proximal endite with one large unipinnate spine, one bare seta and one spine with tubular extension; distal endite with three spines with tubular extensions. Allobasis drawn out into strong pinnate claw with posterior tube pore and two accessory naked setae. Endopod one-segmented with four naked long setae.
Maxilliped ( Figure 4I View Figure 4 ). Subchelate, well developed, elongate. Syncoxa with spinular pattern as figured and with one pinnate seta. Basis with a spinular row on palmar margin near articulation with syncoxa. Endopod represented by short segment bearing bipinnate sigmoid claw with a short seta at base. Midventral surface between syncoxae of maxillipeds and intercoxal sclerite of P1 forming backwardly directed, subcylindrical outgrowth with truncate distal portion and provided with spinules around apical margin ( Figure 4J View Figure 4 ); relative position similar as in Meloriastacus (see Huys and Todaro 1997: Figures 9A–B).
Swimming legs ( Figure 5A–D View Figure 5 ). With three-segmented exopods and three-segmented (P1) or two-segmented (P2–P4) endopods. Intercoxal sclerite bare, wide in P1 and small in P2–P4. Praecoxae represented by well-developed U-shaped sclerites bearing spinules in P3 only. Coxae with distinctive pattern of minute spinules on anterior and posterior surfaces of P1–P2; with anterior secretory pore in P4. Bases with outer bare seta (P1), pinnate spine (P2), or plumose seta (P3–P4); anterior surface with secretory pore.
P1 ( Figure 5A View Figure 5 ). Coxa with spinular row near inner margin as figured. Basis smaller than coxa; with spinules along distal margin, with inner bipinnate seta and outer bare seta. Exopodal segments with spinules along outer margin; exp-3 with two unipinnate spines and two geniculate pinnate setae. Endopod distinctly longer than exopod, not prehensile; segments with spinules along outer margin; enp-1 with serrate inner seta bearing one large proximal spinule; enp-2 without armature; enp-3 with two geniculate setae and one inner vestigial seta (arrowed in Figure 5A View Figure 5 ).
P2–P4 ( Figure 5B–D View Figure 5 ). Bases with spinular rows near the bases of the rami. Outer margins of exopodal segments with spinular rows; outer spine of exp-3 relatively small. Endopodal segments with spinules along outer margin. Outer distal spine of enp-2 fused to segment forming naked spinous process; P2 enp-2 with vestigial seta (arrowed in Figure 5B View Figure 5 ). Armature formula of swimming legs as for genus.
Fifth pair of legs ( Figure 5E View Figure 5 ). Not fused medially; exopod and baseoendopod fused forming elongate-oval plate. Outer margin with plumose (basal) seta (g) and three naked setae (d–f); apex with two bipinnate spines (a, b) and one long naked seta (c); inner margin with one unipinnate seta (z) and a secretory pore. Anterior surface with a secretory pore near proximal outer margin.
Genital field ( Figure 4A View Figure 4 ). Positioned in anterior third of genital double-somite. Gonopores paired; closed off by opercula derived from vestigial P6, each bearing outer long and two short naked setae; two raised row of spinules present on anterior surface of sixth legs. Copulatory pore of moderate size; located in semicircular, shallow depression (arrowed in Figure 4A View Figure 4 ); leading via wide copulatory duct to paired seminal receptacles; flanked by two large secretory tube pores.
Description of male
Total body length from tip of rostrum to posterior margin of caudal rami 460 Mm (paratype NHM reg. no. 2008.621) (448–463 Mm; mean 459 Mm; n 58). Body slender and cylindrical ( Figure 1C View Figure 1 ); ornamentation generally as in female. Hyaline frills of abdominal somites incised, forming rectangular lappets. Sexual dimorphism in antennule, P5, P6, abdominal spinulation, and genital segmentation. Spermatophore length 78 Mm. Anal somite without spinular ornamentation on ventral surface ( Figure 2D View Figure 2 ).
Antennule ( Figure 3D View Figure 3 ). Nine-segmented, slender, haplocer with geniculation between segments 7 and 8. Segment 1 short, with small tube-pore on dorsal surface. Segment 2 longest, about 3.2 times longer than wide. Segment 4 small, represented by incomplete sclerite. Segment 5 with long aesthetasc (length590 Mm) fused basally to a slender seta. Armature formula: 1-[1], 2-[8+1 plumose], 3-[8], 4-[1+1 fused spine)], 5-[2+3 spines+(1+ae)], 6-[1+1 spine], 7-[1+3 modified], 8-[1+1 modified], 9-[7+acrothek]. Acrothek consisting of an aesthetasc (length514Mm) fused basally to two slender setae.
Fifth pair of legs ( Figures 2D View Figure 2 ; 3E View Figure 3 ). Not fused medially; exopod and baseoendopod fused forming subcircular plate; outer basal seta naked. Outer margin with two naked setae; distal margin with two slender naked setae and two unipinnate spines; inner margin without setae/spines but with a small secretory tube pore. Anterior surface with a secretory pore near proximal outer margin.
Sixth pair of legs ( Figure 2D View Figure 2 ). Asymmetrical, defined at base; each P6 with long outer and two short setae; largest P6 functional one.
Etymology
The new species is named after the Mersin Province where the type locality is situated .
| NHM |
University of Nottingham |
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