SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY • NUMBER 543 ...

NUMBER 543 41
Leander beauforti J. Roux, 1923:18, figs. 1, 2 [type locality: Kairatu, Ceram,
Indonesia; brackish water].
Palaemon (Palaemon) debilis.—Holthuis, 1950a:66, fig. 13.
DIAGNOSIS.—Rostrum rather strongly ascendant anteriorly,
tapering almost imperceptibly to subapical dorsal tooth, rostral
formula: 1 + 1-7 + 1/3-10; basal antennular segment with
distolateral spine falling short of adjacent convex distal margin
of segment; dorsal antennular flagellum with free part of
shorter branch slightly longer or shorter than fused part; 1st
pereopod with carpus usually somewhat more than twice as
long as chela; 1st pleopod of male without appendage on
margin of endopod; maximum postorbital carapace length
probably no more then 10 mm.
MATERIAL.—PHILIPPINES. River at Hamilo Point, Luzon;
[14°10'N, 120°34'E]; 13 Jul 1908; 12'seine: 1 male [4.5] 1 ovig
female [6.0].—Santiago River, Pagapas Bay, Luzon; [13° 521^,
120°39'E]; 1.2 m; mud, gravel; 20 Feb 1909 (0800); 130' seine:
2 males [4.6, 4.9].—Bin Island, San Bernardino Strait;
[12°40'N, 124°22'E]; sea beach; 1 Jun 1909: 2 males [4.7,5.3]
6 females [6.3-7.3], 3 ovig [6.6-7.3],—Mahinog, Camiguin
Island, Mindanao Sea; [9°09'N, 124°47'E]; 3 Aug 1909;
tidepools: 2 females [8.9,9.2], 1 ovig [8.9].—Malabang River,
Mindanao; [7°36'N, 124°04'E]; 21 May 1908 (1500); 130'
seine: 1 male [3.2].—Jolo, Jolo Island, Sulu Archipelago;
[6°00'N, 121°00'E]; 6 Mar 1908; shore: 1 male [3.2].
RANGE.—Red Sea to South Africa to Ryukyu Islands,
Philippines and Indonesia, Great Barrier Reef of Australia, and
eastward to Hawaii and the Tuamotu Archipelago; shallow,
salt, brackish, and fresh water.
51. Palaemon pacificus (Stimpson, 1860)
Leander pacificus Stimpson, 1860:40 [type localities: Hong Kong, Hawaii, and
Shimoda].
Palaemon (Palaemon) pacificus.—Holthuis, 195Oa:87, fig. 19.
DIAGNOSIS.—Rostrum usually ascending slightly in anterior
'/2, tapering gradually to subapical dorsal tooth, rostral
formula: 2-3 + 6-8/3-5; basal antennular segment with
distolateral spine distinctly overreaching adjacent convex distal
margin of segment; dorsal antennular flagellum with free part
of shorter branch 3'/2-4 times as long as fused part; 1st
pereopod with carpus l'/2-l 2 /3 times as long as chela; 1st
pleopod of male without appendage on margin of endopod;
maximum postorbital carapace length probably little more than
10 mm.
RANGE.—Suez Canal and Red Sea and eastern and South
Africa, India, Hong Kong, Japan, Indonesia, New Caledonia,
and Hawaii; littoral.
52. Palaemon semmelinkii (De Man, 1881)
Leander semmelinkii De Man, 1881:137 [type locality: Makasar, Celebes].
Palaemon (Palaeander) semmelinkii.—Holthuis, 195Oa:57, fig. 11.
DIAGNOSIS.—Rostrum ascending in anterior '/2, tapering
directly to sharp apex, without subapical tooth, rostral formula:
1 + 6-10/2-5; basal antennular segment with distolateral spine
distinctly overreaching adjacent convex distal margin of
segment; dorsal antennular flagellum with free part of shorter
branch l'/2-2 times as long as fused part; 1st pereopod with
carpus less than twice as long as chela; 1 st pleopod of male
without appendix arising from margin of endopod; maximum
postorbital carapace length probably less than 10 mm.
RANGE.—India, Burma, Malaya, Thailand, Singapore, Philippines,
Indonesia, and northern Australia; shallow marine,
sometimes brackish water.
53. Palaemon serrifer (Stimpson, 1860)
Leander serrifer Stimpson, 1860:41 [type localities: Hong Kong and O Shima;
littoral].
Leander Fagei Yu, 1930:555, 561, fig. 2 [type locality: Shandong Peninsula].
Leander serrifer var. longidactylus Yu, 1930:555, 570, fig. 4B'C [type
localities: "Yangmatoa," Peitaiho, "Tangkou," and Yent'ai (Chefoo),
China].
Palaemon (Palaemon) serrifer.—Holthuis, 1950a:83, fig. 18.
DIAGNOSIS.—Rostrum often nearly horizontal, sometimes
ascending in anterior '/2, often tapering directly to acute apex,
rostral formula: 2-3 + 7-13/3-5; basal antennular segment
with distolateral spine barely, if at all, overreaching adjacent
convex distal margin of segment; dorsal antennular flagellum
with free part of shorter branch 3 times as long as fused part; 1st
pereopod with carpus about l'/2 times as long as chela; 1st
pleopod of male without appendix arising from margin of
endopod; maximum postorbital carapace length probably about
10 mm.
RANGE.—India. Burma, Thailand, Taiwan, China, Korea,
Vladivostok, and Japan and Indonesia and northern Australia;
littoral marine waters.
* Urocaridella Borradaile, 1915
Urocaridella Borradaile, 1915:207 [type species, by monotypy: Urocaridella
gracilis Borradaile. 1915:210 (= Leander urocaridella Holthuis, 195Oa:6,
28); gender: feminine].
DIAGNOSIS.—Rostrum armed with 2 strong basal teeth
elevated into semblance of crest; carapace with strong median
tooth at about mid-length of dorsal surface, with submarginal
branchiostegal spine, without hepatic spine or branchiostegal
suture; mandible with or without palp; 3 posterior pairs of
pereopods with dactyl simple, not biunguiculate, shorter than
propodus; endopod of male 1st pleopod with marginal
appendix.
RANGE.—Maldive Islands, India, Andaman Islands, Mergui
Archipelago, Indonesia, Japan, Palau Islands; sublittoral to 130
meters.
REMARKS.—The proposed re-establishment of the genus
Urocaridella for U. urocaridella—which was transferred to