taxonID	type	description	language	source
7E52EA6DC7075FAF8A32E4CFDCD7000D.taxon	diagnosis	Diagnosis. Diagnosis covers adults of both sexes. Eyes (Figs 15 C, 16 A, B) well-developed, clearly longer than wide. Cornea roughly calotte-shaped with or without indentation of proximal margin, its length 0.5 - 0.7 times length of conical eyestalk, diameter 1.0 - 1.4 times length of terminal segment of antennular trunk. Cornea occupies distal third to half of eye surface. Eyestalk without papilla; length 0.9 - 1.2 times its maximum width at conjunction with cornea. Rostrum (Figs 15 C, 16 B, 17 D) subtriangular, terminally well-rounded; lateral margins concave (Fig. 17 D) to almost straight (Fig. 15 C), margins slightly tilted up; 0.3 - 0.8 times length of terminal segment of antennular trunk (measured along dorsal median line). Antero-lateral edges of carapace well-rounded (Figs 15 C, 17 D). Antennae s. l. (Figs 15 D, 16 C, 17 A-C). Appendix masculina (Figs 16 C, 17 A) strongly setose, measured without setae 0.5 - 0.8 times as long as terminal segment of antennular trunk, shortly extending beyond anterior margin of this segment. Antennal sympod (Figs 16 A, 17 C) with one large, acute tooth on disto-lateral edge and, more caudally, an additional shorter tooth. Dorsal face of sympod with lappet-like to triangular lobe, in every case apically rounded. Antennal scale (Fig. 17 C) setose all around, apically rounded, two-segmented with apical segment only 2 - 4 % total scale length; scale 4 - 5 times as long as its maximum width; scale projecting 0.3 - 0.5 times its length beyond antennular trunk (0.2 - 0.4 in subadults) and 0.4 - 0.6 times beyond antennal peduncle. Thorax (Figs 15, 16 C, 17 G-K, 19 A, B). Right mandible with digitus mobilis and pars centralis modified as in Fig. 11 B; remaining mouthparts normal; labrum not produced rostrally; maxilla without spines. Thorax without mid-sternal processes in both sexes. Flagella of thoracic exopods 1 and 8 with eight segments (Fig. 19 A), flagella 2 - 7 with nine segments. Carpopropodites of thoracic endopods 1 - 8 with 2, 2, 7 - 8, 7 - 8, 9 - 11, 9 - 10, 9 and 8 - 9 segments, respectively. Claw of endopod 1 strong, subapically bilaterally serrated; claws 3 - 8 (Fig. 17 H-K) weak, slender, smooth. Female thoracopods 7 and 8 with large oostegites, thoracopod 6 with rudimentary oostegite. Penes (Fig. 19 B) tube-like, stiff, slender, smooth all along, without setae. Size variable in adult males: length 1.5 - 2.5 times length of ischium 8 and 2 - 3 times merus 8; penes anteriorly extending to thoracic sternites 2 - 5. Figure 14. Mysidetes hanseni in its natural habitat inside ice cave of Damiers Islands, Antarctica A adult male, dorsal B incubating female, dorsal C physical aspect of habitat. Pleopods (Fig. 19 C-E) reduced to undivided, bifid, setose plates with comparatively long endopodal portion (pseudobranchial lobe) in both sexes. All pleopods without spines, no modified setae. Uropods (Figs 16 D, 19 F) entire, slender, setose all around, no spines; exopod extends by 18 - 29 % its length beyond endopod. Telson (Figs 15 B, 19 G) trapezoid, length twice maximum width near basis and 5 - 6 times width shortly above bifid terminus; 0.7 - 0.9 times exopod of uropod. Each lateral margin armed almost all along with 45 - 57 small spines. Sub-basal spine-free portion, if any, up to 1 / 10 telson length in adults (occasionally longer in non-adults). Spines arranged in consecutive sets on distal half; each set represents series of 2 - 6 spines increasing in length distally. Triangular apical cleft (Fig. 15 B) penetrates 1 / 10 telson length, margins of cleft lined all along with 14 - 17 laminae. Telson cleft 1.0 - 1.8 times as deep as its width at apex. Disto-lateral lobes of telson rounded, each lobe terminally armed with 4 - 5 strong, subequal spines with 4 - 5 % telson length.	en	Wittmann, Karl J., Chevaldonne, Pierre (2021): First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227, DOI: http://dx.doi.org/10.3897/zookeys.1079.76412, URL: http://dx.doi.org/10.3897/zookeys.1079.76412
CD9C61C1BD695761931785C0ACCAE211.taxon	diagnosis	Diagnosis. Covers females only. Species of the genus Pseudomma G. O. Sars, 1870, with cornea-like lateral portions separated by sulci from main part of eyeplate (Figs 2 B, 4 C, 23 A), no visual elements. Disto-median fissure penetrates one third of eyeplate. Distal margin of eyeplates with series of minute teeth along sublateral sector (' shoulders', Fig. 23 A, D). Basal segment of antennular trunk without medio-ventral carina. Antennal scale (Fig. 4 B) with setose apical lobe contributing about 1 / 4 scale length. Mandibular palp (Fig. 4 E) 3 - segmented, very large, about as long as antennal scale. Three pairs of oostegites (Fig. 5 I) contributing to wall of brood pouch. Pleopods (Fig. 6 H-L) reduced to setose rods with residual differentiation of endopod (pseudobranchial lobes). Telson (Figs 3 A, 6 N) trapezoid, as long as ultimate pleonite. Its length twice maximum width at basis and four times width at apex. Lateral margins of telson without setae and spines, only minute scales present. Transversely truncate terminal margin with only two pairs of spines, both hispid due to minute scales (Fig. 3 B) along more than proximal 2 / 3 spine length. Large latero-apical and same-sized submedio-apical spines flank median pair of closely set setae (Fig. 3 C) with twice spine length. Margin with short, well-rounded indentation between each spine, median indentation largest. Disto-lateral edge without tooth, with spine only.	en	Wittmann, Karl J., Chevaldonne, Pierre (2021): First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227, DOI: http://dx.doi.org/10.3897/zookeys.1079.76412, URL: http://dx.doi.org/10.3897/zookeys.1079.76412
CD9C61C1BD695761931785C0ACCAE211.taxon	etymology	Etymology. The species name is an adjective with Latinised neutral ending formed by adjectivation of the amalgamated Ancient Greek adjective κρύος (cold) with the noun τρωγλοδύτης (cave dweller). The adjectivation has precedence in the name of the butterfly Macroglossum troglodytus Boisduval, l 875, listed by Kemal et al. (2019) as M. troglodytum.	en	Wittmann, Karl J., Chevaldonne, Pierre (2021): First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227, DOI: http://dx.doi.org/10.3897/zookeys.1079.76412, URL: http://dx.doi.org/10.3897/zookeys.1079.76412
9A5C072AF828512DAFE545592B6DF762.taxon	diagnosis	Diagnosis. Mysidetini with eyes well developed; cornea large, globular, with functional ommatidia; eyestalks well developed. Antennula usually without modified setae (exception: females of M. illigi Zimmer, 1914, as described below). Appendix masculina well-developed, setose. Antennal scale setose all around, no spines and no teeth. Mouthparts normal, maxilla without spines. Male thoracic endopod 2 without notches on outer margin. Thoracic endopods 3 - 8 normal, slender, not prehensile; with multi-segmented carpopropodus; small dactylus with weak claw. Penes long, slender, stiff, and not erectile. Pleopods non-dimorphic, reduced to bifid setose plates, no modified setae and no spines. Endopod of uropods usually with row of spines on inner margin (exception: M. hanseni Zimmer, 1914, as described below). Telson with apical cleft; cleft lined with laminae. Lateral margins of telson at least distally with spines.	en	Wittmann, Karl J., Chevaldonne, Pierre (2021): First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227, DOI: http://dx.doi.org/10.3897/zookeys.1079.76412, URL: http://dx.doi.org/10.3897/zookeys.1079.76412
FBB444BDF1A45E0699F6B834D61E895B.taxon	diagnosis	Diagnosis. Covers adult females and subadults of both sexes: Species of Mysidetes with eyes (Figs 7 A, B, 9 A, B) well-developed, thick. Cornea calotte-shaped, its length 0.8 times length of eyestalk, diameter 1.6 - 1.8 times length of terminal segment of antennular trunk. Eyestalk without ocular papilla; length 0.7 - 0.8 times its width at conjunction with cornea. Rostrum triangular with acute to narrowly-rounded apex and with concave, up-tilted lateral margins; rostrum 0.8 - 1.0 times as long as terminal segment of antennular trunk. Antennae s. l. (Figs 8 C, D, 10 A-C). Terminal segment of antennular trunk with mid-ventral lobe (Figs 8 D, 10 B) bearing modified setae in females (Fig. 25 C). Antennal sympod (Fig. 10 C) with one large, acute tooth on disto-lateral edge and more caudally an additional shorter tooth. Dorsal face of sympod with triangular, apically rounded lobe. Antennal scale two-segmented, apically rounded, setose all around, with apical segment only 2 % total scale length; scale 4 - 7 times as long as its maximum width; scale projects 0.3 - 0.6 times its length beyond antennular trunk. Mouthparts (Fig. 11). Median segment of mandibular palp 2.5 - 3.3 times as long as maximum width (Fig. 11 B), densely setose all around. Right mandible with digitus mobilis and pars centralis modified as in Fig. 11 B; remaining mouthparts normal, labrum not produced rostrally, maxilla without spines. Thorax (Figs 10 D-K, 13 A, B) without mid-sternal processes in females and non-adult males. Flagellum of thoracic exopods 1, 8 with eight segments, flagella 2 - 7 with nine segments (Fig. 13 A). Carpopropodus of thoracic endopods 1 - 8 with 2, 2, 5 - 6, 6 - 8, 7 - 9, 6 - 9, 6 - 8 and 6 - 8 segments, respectively. Claw of endopod 1 (Fig. 10 F) strong, subapically, unilaterally, weakly serrated; claws 3 - 8 (Fig. 10 H-K) weak, slender, smooth. Marsupium formed by two pairs of large oostegites; additional rudimentary oostegite on thoracopod 6 (Fig. 13 A). Subadult males with penes (Fig. 13 B) stiff, slender, 1 - 2 times length of ischium of endopod 8. Pleon (Figs 8 A, 13 B-G). Pleopods (Fig. 13 C-G) reduced to unsegmented, setose plates with comparatively large endopodal portion (pseudobranchial lobe) integrated. All pleopods without spines, no modified setae. Total length increases in series of pleopods 1 to 5. Tail fan (Figs 9 E, 13 H, I). Endopod of uropods (Fig. 13 H) with 8 - 13 slender spines in series from statocyst to 25 - 35 % endopod length from apex; proximal 2 - 4 spines short, in part crowded; remaining 6 - 9 spines longer, subequal amongst each other, about equally spaced in linear series. Telson (Fig. 13 I) trapezoid, length 1.9 - 2.5 times maximum width near basis and 6 - 7 times minimum width on bifid terminus. Length 0.7 - 0.8 times exopod of uropod. Lateral margins of telson each with total of 35 - 47 spines; basal portions with 7 - 9 spines in continuous series followed by an unarmed stretch, median portions start with 2 - 6 spines increasing in length distally, followed up to tip by discontinuous series of large spines with small spines in between. Cleft U-shaped, penetrating 15 - 18 % telson length, margin of cleft lined all along with 23 - 29 laminae of which proximal 3 - 4 laminae larger than remaining 20 - 25 subequal laminae. Cleft 2.0 - 2.5 times as deep as its width at apex. Disto-lateral lobes of telson triangular with narrowly truncate apex; each lobe armed with two spines at apex, mesial spine 0.5 - 0.7 times length of lateral spine. Figure 7. Mysidetes illigi from ice cave of Bernard Island, Antarctica A subadult male, dorsal B subadult male, lateral C hyperbenthic association formed by mysids and early stages of nothotheniid fish D fish swarm mixed with small number of mysids several metres inside cave A, B, living specimens in laboratory.	en	Wittmann, Karl J., Chevaldonne, Pierre (2021): First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227, DOI: http://dx.doi.org/10.3897/zookeys.1079.76412, URL: http://dx.doi.org/10.3897/zookeys.1079.76412
BE91362EA8565F5996E709F88866FB94.taxon	diagnosis	Diagnosis. Pseudommini with eyes reduced to single eyeplate without visual elements. Eyeplate with incomplete disto-median fissure. Appendix masculina large, setose. Lateral margin of antennal scale with smooth basal portion ending in a tooth. Carapace normal, with rounded anterior margin, dorsally covering at least five thoracic somites. Labrum, as far as known, with rounded rostral margin. Thoracic endopods essentially normal, non-prehensile, endopods 3 - 8 long and slender. Two or three pairs of oostegites contribute to marsupium wall, the two posterior pairs, as far as known, with setae on inner, as well as outer faces. Penes, as far as known, long and slender. Male pleopods with distinct sympod bearing separate, setose endopod and exopod. Female pleopods fused to small, setose, undivided plates with residual differentiation of the endopod as a pseudobranchial lobe. Endopod and exopod of uropods unsegmented, setose all around; endopod with or without spine. Telson mostly trapezoid, also linguiform or subtriangular, no cleft. Its lateral margins entirely smooth or proximally smooth with spines only along distal portions; terminal margin with spines, in several species also with medio-apical pair of setae.	en	Wittmann, Karl J., Chevaldonne, Pierre (2021): First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species. ZooKeys 1079: 145-227, DOI: http://dx.doi.org/10.3897/zookeys.1079.76412, URL: http://dx.doi.org/10.3897/zookeys.1079.76412
