Lempos waipio

Lempos waipio

DIAGNOSIS OF MALE.—Lateral cephalic lobes strongly extended forward and truncate, anteroventral margin of head excavate, nearly flat-bottomed, then produced to weak obtuse anteroventral cusp; eyes subcircular, brownish-purple cores in alcohol surrounded by 1–2 layers of clear ommatidia; coxa 1 rounded at anteroventral corner; gnathopod 1 of medium enlargement, article 2 of normal stoutness, anterodistal corner scarcely produced, article 4 with distal point not free, article 5 broad, but only half as long as article 6, latter slightly expanded, subrectangular but slightly tapering distally, anterior margin bulging, poorly setose, palm slightly oblique, bearing deep incision separating 2 processes, defining process slender and armed with basoposterior stout spine, dactyl slender and strongly overlapping palm; article 2 of gnathopod 2 with weak or medium anterodistal cusp, article 4 with distal point not free, article 5 longer than 6, palm oblique but short, defined by spine and slight protuberance, setation moderate; thoracic sternites with spiniform tooth on segments 2–4, obtuse keel on 5, weaker on 1; pleonal epimera 1–3 with bulging posterior margins, weak lateral ridges and slight notch and tooth at posteroventral corners, ventral setae absent; uropod 3 with article 2 on outer ramus and latter shorter than inner ramus, peduncle lacking large spine.

FEMALE.—Gnathopod 1 of normal female kind in Lembos, article 5 nearly as long as 6; gnathopod 2 article 2 lacking anterodistal lobe or that lobe obsolescent; sternal keel absent.

DESCRIPTION.—Antenna 1 as long as head and body together, antenna 2 much shorter; epistome flat in front, remainder of mouthparts like those of L. leapakahi, new species, including left mandibular molar “shark-tooth”; article 2 of pereopods 3–5 with small posteroproximal extension; urosome and uropods appearing similar to figures for L. leapakahi, but spines thinner and peduncles of uropods 1–2 lacking small basolateral setae, uropods 1–2 with long peduncular tooth between rami, and distolateral peduncle of uropod 1 with 1 seta, no spine, and 1 basolateral spine, peduncle of uropod 3 with 1 basolateral seta; telson large but not strongly elevated, with weak pair of posterolateral nobs, with lateral slit only in terminal stages.

COLOR IN ALCOHOL.—Body white except for weak brown dorsal stripes on pereonites 3–6 or 3–5, eyes brown.

HOLOTYPE.—Bishop Museum collections, catalog number 7263, male, 6.1 mm.

TYPE-LOCALITY.—JLB Hawaii 6, off Barbers Point, Oahu, 30 m, “coralline footballs,” 29 January 1967.

MATERIAL.—JLB Hawaii 3 (10), 5 (1), 6 (14), 14 (2).

RELATIONSHIP.—This species differs from L. intermedius Schellenberg (1938) in the strongly overlapping dactyl on male gnathopod 1, the rounded, asetose anteroventral corner of coxa 1, and the presence of simple instead of bidentate sternal teeth on the male.

It differs from L. aequimanus Schellenberg (1938) in the presence of sternal teeth on more than one segment in the male, in the rounded palm of female gnathopod 1, the obtuse anteroventral comer of coxa 1, and the stouter hands of the gnathopods in both sexes.

Lembos waipio differs from American L. macromanus (Shoemaker, 1925) in the longer dactyl of male gnathopod 1 and the presence of the posterior spine on the hand, the stouter, shorter, less setose gnathopod 2, the sparseness of setae on article 2 of pereopods 4–5, the thinner female gnathopod 1, and the presence of more than 2 sternal teeth on the male.

The Hawaiian species differs from Indonesian L. processifer (Pirlot, 1938) in the strongly overlapping dactyl on male gnathopod 1, the thinner peduncle of antenna 2, the presence of 3 strong sternal teeth in the male (instead of 2), the dark eyes, slender article 2 of gnathopod 2 lacking a strong anterolateral excavation, the thinner articles 5–6 of gnathopod 2 in both sexes, the small female gnathopod 1, and the lack of a strong anterodistal cusp on article 2 of female gnathopod 1.

J. L. Barnard (1965a) identified L. processifer from Micronesia, but that identification may now be seen to be erroneous and the Micronesian specimens should be associated with L. waipio, perhaps as a subspecies distinguished by the presence of only 2 sternal processes on the male and a smaller cusp on article 2 of male gnathopod 2. My 1965a identification was supported by a supposition that young males of Lembos might have dactyls fitting palms whereas terminal males might have dactyls overlapping palms but that circumstance does not justify the Micronesian identification of L. processifer in light of the high diversity of species in Hawaii that suggests other parts of the tropics may also have a higher than now expected diversity in this genus. There seems to be little doubt now that Pirlot’s and J. L. Barnard’s materials were both comprised of terminal males.

DISTRIBUTION.—Hawaiian Islands.

Lembos species

DIAGNOSIS OF FEMALE.—Lateral lobes of head strongly extended forward and truncate, anteroventral margin of head excavate, flat-bottomed or slightly concave, then produced to strong anteroventral cusp (like figure for L. leapakahi); eyes circular, dark purple cores surrounded by a layer of clear ommatidia; inner plate of maxilliped with very broad spines in comparison to other species of Hawaiian Lembos (like those of L. kamanu); gnathopod 1 of normal female kind in Lembos, but palm with weak excavation near posterior side, forming weak defining cusp armed with spine, appendage moderately setose, article 2 with weak anterodistal process; gnathopod 2 like that figured for male of L. pualani, article 2 with quadrate anterodistal corner, setation moderate; pleonal epimera 1–3 with bulging posterior margins, all with lateral ridge and small notch and tooth at posteroventral corner, ventral setae absent; uropod 3 with short peduncle and short rami about 1.3 times as long as peduncle, outer slightly shorter than inner and bearing small article 2.

DESCRIPTION.—Antennae and perepods 3–5 missing; epistome rounded anteriorly; mouthparts except inner plate of maxilliped generally like those for L. leapakahi, new species, but left mandibular molar lacking “shark-tooth”urosome and uropods appearing similar to those for L. leapakahi but spines thinner, peduncle of uropod 1 with basolateral spine, distolateral seta but no lateral setae; telson large, strongly elevated, deeply excavate dorsally, with weak pair of posterolateral nobs, deep slit from lateral view and generally appearing as in figure for L. pualani; urosomal dorsal margin normal as in L. pualani.

MATERIAL.—Fee 1 (1).

DISTRIBUTION.—Hawaiian Islands.