taxonID	type	description	language	source
03A45049FFA67E26FE14ACD233ECACFB.taxon	description	(figures 2, 3) Material examined	en	Hanamura, Yukio, Kase, Tomoki (2004): Heteromysoides (Crustacea: Mysidacea: Heteromysini) from a submarine cave on Grand Cayman, the Caribbean Sea: descriptions of a new and a rare species. Journal of Natural History 38 (17): 2145-2152, DOI: 10.1080/00222930310001625914, URL: http://dx.doi.org/10.1080/00222930310001625914
03A45049FFA67E26FE14ACD233ECACFB.taxon	materials_examined	HOLOTYPE: NSMT-Cr 15 630, male (tl ca 2.5 mm), submarine cave named ‘ Mouse Trap’ located in a coral reef approximately 400 m offshore on the west side of Grand Cayman (19 ‡ 19 ′ 14.8 ̎ N, 81 ‡ 23 ′ 22.8 ̎ W), 9 – 11 m. PARATYPES: NSMT-Cr 15 631, two males (ca 2.5, 2.6 mm), two juveniles (1.3, 1.5 mm); NSMT-Cr 15 632, two females (2.2, 3.0 mm), six? females (2.2 – 2.6 mm), one juvenile (1.4 mm); NSMT-Cr 15 633, one? male (ca 2.5 mm), one female (2.5 mm); NSMT-Cr 15 634, one? male (1.7 mm), two? females (2.0, ca 2.5 mm), one juvenile (ca 1.5 mm). For all specimens, data same as holotype. Description Body (figure 2 a) somewhat fragile. Carapace (figure 2 a, b) with anterior margin obtusely produced into wide, subtriangular rostrum; cervical groove distinct at anterior two-fifths; posterior margin excavate, leaving last thoracic somite uncovered in dorsal view, but sufficiently covered laterally: anteroventral corner rounded. Eye (figure 2 b, d) slightly depressed, subquadrate in dorsal aspect; cornea slightly diminished in size, situated in anterolateral part; sharp spiniform process present at anteromesial corner of stalk. Antennule (figure 2 e) with first segment of peduncle subequal in length to the third segment, distolateral corner greatly produced anteriorly, distal end bearing a few setae, distomesial corner with one seta; second segment shortest, obliquely articulated with third segment, mesial margin with one seta each at mid-length and distal corner; third segment rather massive, with a few sensory setae distoventrally. Antenna (figure 2 f) with long, elliptical scale, extending beyond anterior end of antennular peduncle by onequarter of its length, latter more than six times as long as wide, without suture separating distal lobe, setose all around margin. Labrum (figure 2 g) triangular, without anteromedial process or spine. Mouthparts as illustrated (figure 3 a – e). Third thoracopod (figure 3 f) similar to posterior thoracopods and endopod not modified, but with simple termination; dactylus short, apex with long claw and a few setae; carpopropodus constituting three articles, basal segment subequal in length to distal two segments combined; merus slightly shorter than carpopropodus; ischium subequal to length of merus. Endopod of fourth thoracopod (figure 3 g) with dactylus short, bearing long terminal claw and a few setae; carpopropodus consisting of four articles, basal article longest, second article subequal in length to third, and fourth one shortest; merus and ischium subequal in length: exopod composed of about 10 articles distal to basal plate. Penis (figure 3 h) long, fully reaching second thoracopod, apex without seta. Abdomen without spine, hair or groove; first five somites subequal in length; sixth somite 1.33 – 1.63 (average: 1.51) times as long as fifth somite. Telson (figure 2 c) as long as or slightly longer than sixth abdominal somite, about 1.8 times as long as basal width, rather abruptly narrowing at basal one-fifth, then width steadily decreasing distally; posterior margin nearly truncate, with two pairs of spines, lateral pair about 1.5 times longer than mesial pair; lateral margin with four or five spines subequal in length on distal half and basally unarmed. Pleopods (figure 3 i – k) all rudimentary, single lobes, in both sexes; fifth pleopod longest, about twice length of fourth. Uropod (figure 2 h) extending well beyond edge of telson; exopod subequal in length to endopod, subrectangular; endopod slightly narrowing distally, without spines near statocyst region or along mesial margin. Egg size Stage III embryos (in preserved specimen) measured 0.9 mm across the anterior end to the tip of the telson. Etymology The specific name ‘ stenoura ’ is derived from the Greek, ‘ stenos ’ (~ narrow) and ‘ oura ’ (~ tail), with reference to the distally narrow telson, as compared with similar species. Habitat For details of environmental characteristics of the sampling site, see Ohtsuka et al. (2002). Remarks Heteromysoides stenoura exhibits closest similarity to H. simplex, from submarine caves of Okinawa, south-western Japan, because both species have a spiniform process on the eyes and a simple termination to the endopod of the third thoracopod. However, the new species has the distal part of the telson much narrower than in its Pacific congener. Moreover, the eyes of the new species have a more developed cornea (ommatidia numerous versus about 20; for H. simplex, see Hanamura and Kase, 2001). A simple termination to the third thoracic endopod of the present new species is also shared with Heteromysoides nana Murano, 1998, recorded from shallow water of northern Australia, but the Australian species does not bear the ocular process on the eyes.	en	Hanamura, Yukio, Kase, Tomoki (2004): Heteromysoides (Crustacea: Mysidacea: Heteromysini) from a submarine cave on Grand Cayman, the Caribbean Sea: descriptions of a new and a rare species. Journal of Natural History 38 (17): 2145-2152, DOI: 10.1080/00222930310001625914, URL: http://dx.doi.org/10.1080/00222930310001625914
03A45049FFA67E26FE14ACD233ECACFB.taxon	distribution	Distribution Known only from the type locality, at depths from 9 to 11 m.	en	Hanamura, Yukio, Kase, Tomoki (2004): Heteromysoides (Crustacea: Mysidacea: Heteromysini) from a submarine cave on Grand Cayman, the Caribbean Sea: descriptions of a new and a rare species. Journal of Natural History 38 (17): 2145-2152, DOI: 10.1080/00222930310001625914, URL: http://dx.doi.org/10.1080/00222930310001625914
