Pseudocoutierea dotae, Grave, De, 2007

Grave, De, 2007, A new species of Pseudocoutierea Holthuis from the Caribbean coast of Panama (Crustacea, Decapoda, Palaemonidae), with a key to the genus, Zootaxa 1397, pp. 29-37 : 30-35

publication ID	https://doi.org/ 10.5281/zenodo.175343
DOI	https://doi.org/10.5281/zenodo.6236472
persistent identifier	https://treatment.plazi.org/id/AC1787AC-FFF0-FFD8-FF32-FF40FDCEFEF3
treatment provided by	Plazi
scientific name	Pseudocoutierea dotae
status	sp. nov.

Treatment

Pseudocoutierea dotae View in CoL sp. nov. ( Figs. 15 View FIGURE 1 View FIGURE 2 View FIGURE 3 View FIGURE 4 View FIGURE 5 )

Material examined. Holotype, nonovigerous female (postorbital carapace length (pocl) 2.4 mm), from Stichopathes lutkeni Brook (Anthozoa, Antipatharia ); Hospital Point, Cayo Solarte, Bocas Province, Panama, 09º20.016’N 082º13.133’W, 15 m depth; collected by S. De Grave & M. Salazar, 06/08/2005 (NHM 2006.1930)

Comparative material examined. Pseudocoutierea wirtzi d’Udekem d’Acoz, 2001 ; 8 specimens (paratypes, pocl 1.92.5 mm), São Tiago Island, Cape Verde Islands, on Leptogorgia gaini Stiasny , 2030 m depth, collected by P. Wirtz, December 1998 ( KBIN IG.28546); ovigerous female (pocl 4 mm), male (pocl 3.4 mm), São Tiago Island, Cape Verde Islands, on Stichopathes lutkeni , 2030 m depth, collected by P. Wirtz, February 2000 ( KBIN IG.28871). Pseudocoutierea antillensis Chace, 1972 ; 2 specimens (pocl 1.1, 1.3 mm), Pelican Point, Cayos Grande, Cayos Cochinos, Honduras, from Pseudopterogorgia americana (Gmelin) , 4.6 16.7 m depth, collected by M. Dowell & D. Livingston, 01/07/2003 ( OUMNH ZC. 220417 004).

Description. Carapace broad, depressed ( Fig. 1 View FIGURE 1 A), welldeveloped antennal spine present ( Fig 1 View FIGURE 1 A, C), immediately below this spine is a acuminate lobe, giving the antennal spine a bifid appearance in lateral view ( Fig. 1 View FIGURE 1 C); blunt hepatic protuberance present ( Fig. 1 View FIGURE 1 A, B, C); pterygostomial sinus well developed ( Fig. 1 View FIGURE 1 C); carina present between the middle of the pterygostomial sinus and the posthepatic protuberance, extending beyond protuberance ( Fig. 1 View FIGURE 1 A, C); orbital ridge welldeveloped.

Rostrum apically inclined, unarmed, tip acute, reaching to end of antennal scale ( Fig. 1 View FIGURE 1 A, B); proximal half expanded to form a relatively broad supraorbital eave ( Fig 1 View FIGURE 1 B), frontal margin of supraorbital eave gently curving; longitudinal carina present on supraorbital eave, continuing distally past supraorbital eave and expanding onto carapace up to the level of the posthepatic protuberance ( Fig. 1 View FIGURE 1 B).

First thoracic sternite with a low transverse ridge, median boss present; second thoracic sternite with welldeveloped transverse ridge, with broad median notch; other sternites unadorned.

Pleura of third to fifth pleonite with posteroventral acuminate tooth ( Fig. 1 View FIGURE 1 D), more developed on fifth pleonite; pleura of third and fourth pleonite dorsally acuminate ( Fig. 1 View FIGURE 1 D). Sixth pleonite 1.6 times as long as fifth, 0.75 times as long as telson; dorsolateral lobe of sixth pleonite well developed, acuminate ( Fig. 1 View FIGURE 1 D).

Telson nearly three times as long as wide ( Fig. 2 View FIGURE 2 D), tip convex; two pairs of dorsolateral spines, situated at 0.6 and 0.8 of telson length respectively; telson tip with 3 pairs of robust spines, outer pair and mesial pair about 0.35 times as long as intermediate spines, mesial spines setose.

Eyestalks large, broad, cornea not broader than unpigmented part.

Antennular peduncle robust ( Fig. 2 View FIGURE 2 A); stylocerite short; lateral margin of first segment sinuous, distolateral tooth well developed, reaching to about 0.75 of second segment, pronounced tooth present on ventral side ( Fig. 1 View FIGURE 1 C, 2A); third segment about 1.8 times as long as second segment. Outer antennular flagellum fused for 3 segments, free part of accessory flagellum well developed, consisting of two segments, 0.7 times as long as fused part ( Fig. 2 View FIGURE 2 A)

Scaphocerite overreaching antennular peduncle, broad ( Fig. 2 View FIGURE 2 B), 2.5 times as long as wide, outer margin straight, distolateral tooth falling far short of distal margin.

Mouthparts (except third maxilliped) not dissected. Third maxilliped short ( Fig. 2 View FIGURE 2 C), reaching to end of basicerite; exopod absent; lateral plate well developed, rounded, small bilobed arthrobranch present; basis fused with ischiomerus (antepenultimate segment); antepenultimate segment about 2.5 as long as penultimate segment, ultimate segment about 0.8 times as long as penultimate, tip furnished with numerous long setae ( Fig. 2 View FIGURE 2 C).

First pereiopod robust, overreaching scaphocerite by 0.2 of its length ( Fig. 1 View FIGURE 1 A); basis and ischium near equal in length ( Fig. 3 View FIGURE 3 A); merus curved, about 2.3 times as long as ischium; carpus about 0.8 times as long as merus. Chelae robust, fingers about half as long as palm, palm about 0.45 times as wide as long.

Left second pereiopod robust (right one missing), carpus reaching not reaching end of scaphocerite ( Fig. 1 View FIGURE 1 A); ischium about 1.1 times as long as merus ( Fig. 3 View FIGURE 3 B); carpus about 0.6 times as long as merus; chelae robust, fingers about 0.7 times as long as palm, both movable and immovable finger with single, terminal, curved tooth ( Fig. 3 View FIGURE 3 C)

Third pereiopod robust ( Fig. 4 View FIGURE 4 A); merus slightly curved, nearly twice as long as ischium, hook shaped protuberance present on distal part of flexor margin ( Fig. 4 View FIGURE 4 B); carpus 0.3 times as long as merus; propodus as longs as merus, single spine on inferodistal, together with three simple setae ( Fig. 4 View FIGURE 4 C); dactylus short ( Fig. 4 View FIGURE 4 C), stout, curved.

Fourth ( Fig. 4 View FIGURE 4 D) and fifth ( Fig. 4 View FIGURE 4 E) pereiopods similar to third pereiopod in form, length and proportions.

Uropods overreaching telson ( Fig. 1 View FIGURE 1 D), exopod and endopod equal in length ( Fig. 2 View FIGURE 2 E); distolateral tooth of exopod welldeveloped, without movable spine between blade and distolateral tooth( Fig. 2 View FIGURE 2 E).

Colour description. Body generally transparent ( Fig. 5 View FIGURE 5 ); white transverse band on carapace (Vshaped in dorsal view); proximal white transverse band on first pleonite; distal white transverse band on third, fifth and sixth pleonite; eyestalks and cornea white, connected with white transverse band; scattered yellow chromatophores on first and second pereiopods, scaphocerite and tailfan.

Derivation of name. In memory of Ms Dorothea “Dot” Pelham, longterm staff member of the Oxford University Museum of Natural History, the name is a genitive.

Habitat. The single specimen was obtained from a colony of Stichopathes lutkeni (Anthozoa, Antipatharia ) at a depth of 15m.