Parapontophilus caledonicus, Komai, 2008
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publication ID |
https://doi.org/ 10.5281/zenodo.5393746 |
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publication LSID |
lsid:zoobank.org:pub:64CFDA2E-D606-4B3D-9A5B-E2FDF9B6974E |
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persistent identifier |
https://treatment.plazi.org/id/03AEC142-570C-FF8B-4A94-FA5B27A18F58 |
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treatment provided by |
Marcus |
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scientific name |
Parapontophilus caledonicus |
| status |
sp. nov. |
Parapontophilus caledonicus n. sp. ( Figs 24 View FIG ; 25 View FIG )
TYPE MATERIAL. — Holotype: BATHUS 1, stn DE 694, 20°35.9’S, 164°58.3’E, 400-500 m, 17.III.1993, ♀ 2.5 mm, (MNHN-Na 16077). GoogleMaps
Paratypes: same data as holotype, 1 ♂ 3.5 mm, 2 ♀♀ 2.3, 3.3 mm (MNHN-Na 16077b).
ETYMOLOGY. — Named after the type locality, New Caledonia.
DISTRIBUTION. — Known only from the type locality in New Caledonia ( Fig. 36 View FIG ), 400- 500 m.
DESCRIPTION
Rostrum ( Fig. 24 View FIG A-D) relatively short, narrow triangular in dorsal view, 0.14)-0.15 of carapace length, directed forward, straight, falling short of or reaching tips of antennal teeth; lateral margins armed with 1 or 2 tiny teeth on either side, anterior pair, if present, arising at about midlength of rostrum. Carapace ( Fig. 24A, B, D View FIG ) 1.40-1.50 times longer than wide; anterior epigastric tooth small, but clearly recognizable; posterior epigastric tooth moderately small, followed by weak middorsal ridge reaching beyond midlength of carapace; cardiac tooth absent; postorbital tooth very small; epibranchial tooth absent; epibranchial ridge absent; branchiostegal tooth moderately small, reaching dorsodistal margin of antennal basicerite.
Third pleonal somite ( Fig. 24F View FIG ) with moderately convex tergum and with moderately produced posterodorsal margin. Fifth somite ( Fig. 24F View FIG ) rounded dorsally. Sixth somite ( Fig. 24F, G View FIG ) 2.90-3.00 times longer than wide, 2.30-2.50 times longer than deep, about 2.00 times longer than fifth somite; dorsal surface rounded.
Ophthalmic appendage ( Fig. 24A, E View FIG ) subpyriform; cornea pigmented with brownish gray; corneal surface distinctly faceted with moderately small lenses; maximal diameter of cornea 0.16-0.18 of carapace length; eye-stalk slightly constricted at base; ventromesial face without papilla-like projection. Antennular peduncle ( Fig. 24A View FIG ) reaching midlength of antennal scale. Antennal scale ( Fig. 24A View FIG ) 0.58-0.60 of carapace length and 2.60-2.80 times longer than wide; lateral margin straight, lamella somewhat produced, distinctly overreaching distolateral tooth.
Palm of first pereopod ( Fig. 25A, B View FIG ) 3.30-3.50 times longer than wide; pollex moderately small, width of palm including tip of pollex about 1.30 of width proximal to base of pollex; cutting edge moderately oblique; merus with relatively weak dorsodistal tooth. Second pereopod ( Fig. 25C View FIG ) overreaching midlength of merus of first pereopod. Fourth pereopod ( Fig. 25D View FIG ) overreaching distal margin of antennal scale by half to full length of dactylus; dactylus elongate, subspatulate, 0.95-1.05 of propodal length; carpus 0.55-0.65 of propodal length. Fifth pereopod similar to fourth, slightly falling short of distal margin of antennal scale.
Appendix masculina of male second pleopod about 0.80 length of appendix interna.
Coloration in life
Unknown.
Size
Male CL 3.5 mm; females CL 2.5-3.3 mm.
REMARKS
The number of lateral rostral teeth is variable in the present new species, although in other species of the group, the number of teeth is constant. In the holotype and the smaller female paratype, the rostrum bears only one pair of lateral teeth; the male paratype has two pairs of lateral teeth, and the other, larger female paratype, have one left and two right teeth.
Morphological similarity suggests that the closest relative of Parapontophilus caledonicus n. sp. is P. juxta n. sp. Nevertheless, P. caledonicus n. sp. is characteristic in having a short rostrum, which only reaches the level of the antennal spines of the carapace. In P. demani and other four new species, the rostrum distinctly overreaches the level of the antennal spines. The dactyli of the fourth and fifth pereopods may be proportionally longer in P. caledonicus n. sp. than in P. demani and other four new species. Furthermore, the sixth abdominal somite seems to be proportionally shorter in P. caledonicus n. sp. than in P. juxta .
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.