Turleania McLaughlin, 1997

McLAUGHLIN, Patsy A., 2007, New records and a new species in the genus Turleania McLaughlin, 1997 (Crustacea, Decapoda, Anomura, Paguridae) from MUSORSTOM cruises, with a key to species, Zoosystema 29 (3), pp. 583-593 : 584-586

Genus Turleania McLaughlin, 1997

Anapagrides de Saint Laurent-Dechancé, 1966: 262 (in part). — Miyake 1978: 142 (in part).

Anapagrides – de Saint Laurent 1968: 1115. — Haig & Ball 1988: 177. Not Anapagrides de Saint Laurent- Dechancé, 1966.

Laurentia McLaughlin & Haig, 1996: 76 . Not Laurentia Ragonot, 1888 .

Turleania McLaughlin, 1997: 476 . — Komai 1999: 49. Gender feminine.

TYPE SPECIES. — Laurentia albatrossae McLaughlin & Haig, 1996 , by original designation.

EMENDED DIAGNOSIS. — Eleven pairs of deeply quadriserial gills. Rostrum well developed, triangular; terminally acute or blunt.Ocular peduncles with corneas slightly to prominently dilated; ocular acicles simple or multifid. Antennal peduncle with supernumerary segmentation. Maxillule with external lobe of endopod somewhat produced, not recurved; with or without terminal seta. Third maxilliped with crista dentata well developed, without accessory tooth. Chelipeds unequal or subequal, with right appreciably stouter, but not necessarily longer. Second and third pereopods with or without corneous spines on ventral margins of dactyls; carpi each with small dorsodistal spine. Sternite of third pereopods (sixth thoracic sternite) with subquadrate or weakly subrectangular anterior lobe, unarmed or with one to few marginal spines or tubercles. Fourth pereopod subchelate or weakly semichelate; propodal rasp consisting of single row of corneous scales. Sternite of fifth pereopods (eighth thoracic sternite) as single subquadrate, circular or ovate lobe. Males with moderately long to long sexual tube developed from coxa of left fifth pereopod, frequently folded or coiled, terminating in tuft of setae, right fifth coxa with gonopore and sometimes papilla or very short sexual tube; pleon with unequally biramous left pleopods 3-5. Females with paired gonopores, no paired and modified first pleopods; pleon with well developed, unpaired, biramous left pleopods 2-4, pleopod 5 as in males. Uropods markedly asymmetrical. Telson without or with very weak lateral indentations indicating anterior and posterior portions; posterior lobes symmetrical or asymmetrical, separated by distinct median cleft; terminal margins usually oblique, unarmed or with few small spines.

REMARKS

As pointed out by McLaughlin & Haig (1996), de Saint Laurent-Dechancé (1966) established the genus Anapagrides for three undescribed species and based her generic diagnosis on characters those taxa had in common. But she designated Eupagurus (Spiropagurus) facetus Melin, 1939 as the type species, incorrectly believing that it shared the same characters. Haig & Ball (1988) added a fourth species to the genus, but only as Anapagrides sp. After McLaughlin & Sandberg (1995) redescribed Melin’s (1939) taxon, it became clear that Anapagrides facetus could not be considered congeneric with the undescribed taxa and the latter were made available to McLaughlin & Haig. The four taxa were represented by just one, one, two, and three specimens, respectively, most quite small. McLaughlin (1997) increased the known number of specimens of T. senticosa from three to 10, and described the fifth species, T. multispina , on five specimens. The additional 14 specimens of T. senticosa and six of T. multispina now available has made it more feasible to assess morphological variability within the genus.

With the discovery of Turleania boucheti n. sp., McLaughlin’s (2003) key to the genera of the Paguridae will no longer accurately lead the user to Turleania . In the new species described herein, although the right cheliped is appreciably stouter than the left, it is not necessarily longer, as is also the case for species of Iridopagurus de Saint Laurent- Dechancé, 1966. Carcinologists familiar with both genera would have no difficulty in distinguishing between them, but as both share the majority of characters used in McLaughlin’s (2003) key, attention is called to a significant character not previously emphasized. Species of Turleania are distinct in the development of the sternite of the fifth pereopods (eighth thoracic sternite) as a single small, ovate, subquadrate or circular lobe. This same sternite in species of Iridopagurus is subrectangular and has a generally bilobed appearance (see García-Gómez 1983). Similarly, the anterior lobe sternite of the third pereopods (sixth thoracic sternite) is most often subquadrate or subovate in Turleania , but broadly and irregularly rectangular in Iridopagurus ; however, variability in both genera makes this character less reliable. For example, in T. spinimanus Komai, 1999 this lobe is described as “hammer-shaped” and in Iridopagurus magaritensis García-Gómez, 1983 , it is described as irregularly semisubcircular.

McLaughlin (1997) noted in her diagnosis of Turleania that the protrusion of the vas deferens from the right male gonopore occasionally produced a slight papilla, but that no sexual tube was developed. However, in males of T. senticosa from New Caledonia and males of T. boucheti n. sp. from the Wallis and Futuna economic zone, a short, but definitive sexual tube, as defined by Tudge & Lemaitre (2004), is sometimes present.

KEY TO THE SPECIES OF TURLEANIA MCLAUGHLIN, 1997

1. Ocular acicles simple .................................................................................................. 2

— Ocular acicles multifid ............................................................................ T. multispina

2. Right chela with dorsal surface unarmed or with very few scattered spinules .............. 3 — Right chela with dorsal surface armed with numerous spines or spinules .................... 5 3. Dactyl of right cheliped with row of spines on dorsomesial margin ................... T. balli — Dactyl of right cheliped unarmed or with only few low protuberances on dorsomesial

margin ....................................................................................................................... 4

4. Corneas only very slightly dilated; dorsomesial margin of right chela with few widely-spaced spines; dactyls of ambulatory legs each with 6-8 corneous spines on ventral margin ...... ...................................................................................................................... T. sibogae

— Corneas prominently dilated; dorsomesial margin of right chela unarmed; dactyls of ambulatory legs without corneous spines on ventral margins .............. T. boucheti n. sp.

5. Dorsomesial margin of palm of right chela with row of prominent spines .... T. albatrossae — Dorsomesial margin of palm of right chela with spinules or irregular rows of small spines

................................................................................................................................... 6

6. Anterior lobe of sternite of third pereopods subovate to subquadrate, with 0-5 small

marginal spines ........................................................................................... T. senticosa — Anterior lobe of sternite of third pereopods “hammer-shaped”, unarmed .... T. spinimanus

Turleania multispina McLaughlin, 1997 ( Fig. 1A )

Turleania multispina McLaughlin, 1997: 497 , fig. 12. — Komai 1999: 50.

HOLOTYPE. — Indonesia. Kai Islands , KARUBAR, stn CP 35, 06°08’S, 132°45’E, 390-508 m, 27.X.1991, ovig. ♀ (2.3 mm) (MNHN-Pg 5273).

PARATYPES. — KARUBAR, stn DW 02, 05°47’S, 132°13’E, 209-230 m, 22.X.1991, 1 ovig. ♀ (2.1 mm) ( USNM 276003 ). — Stn DW 03, 05°48’S, 132°13’E, 278-301 m, 22.X.1991, 1 ♂ (1.8 mm) (MNHN-Pg 5271) ; 1 ♀ (1.9 mm) ( POLIPI). — Stn DW 31, 05°40’S, 132°51’E, 288-289 m, 26.X.1991, 1 ♀ (2.1 mm) (MNHN-Pg 5272) .

NEW MATERIAL EXAMINED. — New Caledonia. MUS- ORSTOM 4, stn CP 158, 18°49.30’S, 163°15.00’E, 620 m, 15.IX.1985, 1 ♀ (2.2 mm) (MNHN-Pg 7716). — Stn CP 169, 18°54.03’S, 163°11.20’E, 600 m, 17.IX.1985, 1 ♂ (1.8 mm), 1 ♀ (1.5 mm), 1 ovig. ♀ (2.9 mm) (MNHN-Pg 7717). — Stn CC 177, 18°54.60’S, 163°10.00’E, 540-600 m, 18.IX.1985, 1 ♂ (2.4 mm) (MNHN-Pg 7740). — Stn CP 199, 18°50.00’S, 163°14.50’E, 600 m, 20.IX.1985, 1 ovig. ♀ (2.4 mm) (MNHN-Pg 7718).

DISTRIBUTION. — Kai Islands , Indonesia, Philippine Islands, and now New Caledonia ; 309-620 m.

REMARKS

As previously indicated, Komai (1999) commented that all five species of Turleania known at that time from Indonesia also were found in the Philippine Islands; however, he gave no specific information for any of them. The presence of T. multispina in New Caledonian waters represents significant geographic and bathymetric range extensions. Although these specimens agree well with McLaughlin’s (1997) original description, some variations have been observed.Most obvious are the oblique terminal margins of the ocular acicles ( Fig. 1A ), each provided with five or six long and moderately slender spines. The spines on both chelae appear slightly larger and more numerous than in McLaughlin’s (1997: fig. 12b, c) illustrated holotype, and the spines on the dorsomesial margins of the right carpi form more definitive rows. The dorsomesial margin of the carpus of the left cheliped may be unarmed, as in the Indonesian specimens, or may have minute spinules in the larger specimens.

Figures

FIG. 1. — A, Turleania multispina McLaughlin, 1997, ovig. ♀ 2.9 mm, MUSORSTOM 4, stn CP 169 (MNHN-Pg 7717); B-H, Turleania boucheti n. sp., MUSORSTOM 7, stn DW 530 (MNHN-Pg 7730); B-F, H, paratype ♀ 3.2 mm; G, paratype ♂ 2.8 mm; A, B, shield and cephalic appendages (aesthetascs omitted); C, right second pereopod (lateral view); D, left third pereopod (lateral view); E, anterior lobe of sternite of third pereopods; F, propodus and dactyl of right fourth pereopod (lateral view,setae omitted); G, coxae and sternite of fifth pereopods; H, telson. Scale bars: 1 mm.