taxonID	type	description	language	source
A046CE435CFF5A769AE9C525E0BE4F31.taxon	materials_examined	Additional material. 60 ♂♂ and more than 100 ♀♀, same data as for holotype, preserved in 70 % ethanol, IEBR-COP-AED 05.2018.13; 5 ♂♂ and 5 ♀♀, same data as for holotype, prepared for SEM examination, retained in the collection of the first author (DLT).	en	Tran, Duc Luong, Chang, Cheon Young (2020): First record of the genus Boholina (Copepoda, Calanoida, Pseudocyclopidae) in Vietnam, with description of a new species from an anchialine cave in Tra Ban Island. ZooKeys 977: 1-23, DOI: http://dx.doi.org/10.3897/zookeys.977.55040, URL: http://dx.doi.org/10.3897/zookeys.977.55040
A046CE435CFF5A769AE9C525E0BE4F31.taxon	etymology	Etymology. The proposed name refers to reduction of the terminal spine on the distal exopod segment of P 5 in the male as well as the proximal outer spine on the distal exopodal segment of P 5 in the female, which are the most remarkable characteristics differentiating this new species from all the congeneric species of Boholina.	en	Tran, Duc Luong, Chang, Cheon Young (2020): First record of the genus Boholina (Copepoda, Calanoida, Pseudocyclopidae) in Vietnam, with description of a new species from an anchialine cave in Tra Ban Island. ZooKeys 977: 1-23, DOI: http://dx.doi.org/10.3897/zookeys.977.55040, URL: http://dx.doi.org/10.3897/zookeys.977.55040
A046CE435CFF5A769AE9C525E0BE4F31.taxon	diagnosis	Diagnosis. Boholinid form in both sexes. Postero-lateral corners of second and third pedigerous somites rounded, fourth and fifth pedigerous somites completely fused. Rostrum represented by a narrow chitinized projection with pointed tip. Medial lobe of distal segment A 2 endopod with nine setae. Mandibular palp basis with three setae; distal segment of endopod with 11 setae; seta on first segment of exopod present. Maxillule exopod with 11 setae and seta on basal exite absent. Second and third segments of maxilliped endopod with three setae each. Terminal spine on exopod of leg 4 modified with row of large spinules on mid-inner margin. Female: Gonopores on double-somite located close together on mid-ventral surface, septum between gonopores reduced to vestige deep inside genital opening. P 5 Exp- 3 with only one spine on outer margin and four setae on inner margin; distal segment of P 5 endopod with one seta on outer margin. Male: Process at antepenultimate segment of right antennule absent. Right P 5 exopod 2 - segmented; distal segment with three spines, including a vestigial one on outer margin, while terminal and inner spine absent.	en	Tran, Duc Luong, Chang, Cheon Young (2020): First record of the genus Boholina (Copepoda, Calanoida, Pseudocyclopidae) in Vietnam, with description of a new species from an anchialine cave in Tra Ban Island. ZooKeys 977: 1-23, DOI: http://dx.doi.org/10.3897/zookeys.977.55040, URL: http://dx.doi.org/10.3897/zookeys.977.55040
A046CE435CFF5A769AE9C525E0BE4F31.taxon	description	Description of adult female. Total length (without furcal setae) 858 - 944 µm (mean 892 µm, N = 20). Ratio of prosome to urosome length about 3.1: 1 (Fig. 2 A, B). Prosome ovoid in dorsal view, 5 - segmented, comprising cephalosome; first pedigerous somite separated from cephalosome; second and third free pedigerous somites with postero-lateral corners rounded; fourth and fifth pedigerous somites completely fused. Urosome 4 - segmented, comprising genital double-somite, two free abdominal somites and anal somite. Genital double-somite slightly asymmetrical, widest about at mid-length; posterior margin ornamented with smooth hyaline membrane dorsally and small dentate hyaline frill ventrally, about as long as wide; paired gonopores equal in size, located close together on mid-ventral surface, the septum between gonopores reduced to vestige, deep inside genital opening; gonoporal plates small, and gonoporal slits large; two pairs of sensilla present (Figs 2 D, 9 C, D, arrows), one pair positioned adjacent to posterior margin of gonopores and second pair located ventrolaterally near posterior margin of double-somite. Third and fourth abdominal somites cylindrical, subequal in length (Fig. 2 D); third with finely serrated hyaline membrane all around posterior margin, fourth with posterior margin hyaline membrane expanded mid-dorsally to four large spines functioning as pseudoperculum concealing anal opening and mid-ventrally with finely serrated hyaline membrane on posterior margin. Anal somite extremely short, posterior margin smooth, concealed within posterior rim and hyaline membrane of second free abdominal somite. Caudal rami (Fig. 2 A, D) short, about 1.5 times longer than wide, with pointed dorsal process in middle of distal margin; distal inner margin with a row of setules; ventral surface with a small pore near inner distal edge; ornamented six caudal setae; seta I lacking, seta II spiniform, about 1.2 time as long as caudal ramus; setae III-VI plumose, ratio of setae V: IV: VI: III: II as 5.8: 4.3: 4.1: 2.4: 1.0; dorsal seta VII short, naked, about 0.5 times as long as seta II. Rostral filaments absent, rostrum represented by a narrow chitinized projection with pointed tip (Figs 2 B, C, 9 B, arrows); pair of long sensilla present in proximal part of rostrum. Antennules (Figs 2 A, 3 A) symmetrical, extending to middle area of pedigerous somite 5, 24 - segmented with ancestral segments II-IV and XXVII-XXVIII fused, X-XI party fused, other articulations expressed, ventral surface of segment 1 with a row of small oblique spines. Armature formula as follows (s - setae, ae - aesthetasc): segment 1 (ancestral segment I) 1 s + 1 ae, segment 2 (II-IV) 6 s + 1 ae, segment 3 (V) 2 s + 1 ae, segment 4 (VI) 2 s, segment 5 (VII) 2 s + 1 ae, segment 6 (VIII) 2 s, segment 7 (IX) 2 s + 1 ae, segment 8 (X-XI) 3 s + 2 ae, segment 9 (XII) 1 s, segment 10 (XIII) 1 s + 1 ae, segment 11 (XIV) 1 s + 1 ae, segment 12 (XV) 1 s + 1 ae, segment 13 (XVI) 1 s + 1 ae, segment 14 (XVII) 1 s, segment 15 (XVIII) 1 s + 1 ae, segment 16 (XIX) 1 s, segment 17 (XX) 1 s, segment 18 (XXI) 1 s + 1 ae, segment 19 (XXII) 1 s, segment 20 (XXIII) 1 s, segment 21 (XXIV) 2 s, segment 22 (XXV) 2 s + 1 ae, segment 23 (XXVI) 2 s, segment 24 (XXVII-XXVIII) 5 s + 1 ae. Antenna (Figs 3 B, 8 A) biramous. Coxa and basis separate, coxa small, with a seta. Basis robust with two setae on inner distal corner. Endopod 2 - segmented; proximal segment elongated, 2.2 times as long as wide, with two naked setae at 1 / 3 distal length of inner margin; distal segment with two lobes, medial lobe bearing six setae distally and three setae on inner distal margin, outer lobe with six long setae terminally and a short sub-terminal seta, outer margin ornamented with small serrated process (Fig. 3 B, arrow) subdistally on medial margin and adjacent tiny spinules. Exopod 9 - segmented, with setal formula of 1, 1, 1, 1, 1, 1, 1, 1, 3. Mandible (Figs 3 C, 8 B) with about eight small teeth on gnathobase plus small distal spinulose seta; ventral-most teeth largest. Mandibular palp biramous; basis robust with three unequal smooth setae on inner margin. Exopod 5 - segmented, setal formula 1, 1, 1, 1, 2. Endopod 2 - segmented, proximal with four smooth setae at distomedial angle, distal segment with 11 naked setae on distal margin. Maxillule (Figs 4 A, 8 C) with 10 marginal spinulose spines, one naked seta on anterior surface and four stiff setae on posterior surface of praecoxal arthrite. Coxal epipodite with seven plumose setae and two naked setae; coxal endite with four plumose setae. Basis fused to exopod, proximal basal endite with four plumose setae, distal basal endite sub-separated with endopod carrying five plumose setae; basal exite bared. Exopod completely fused to basis bearing 11 plumose setae, posterior surface with a slender oblique row of setules. Endopod with segments 1 and 2 fused, segments 2 and 3 separate, with three plumose, four bare and seven (2 plumose + 5 bare) setae, respectively. Maxilla (Figs 4 B, 8 D) 7 - segmented, comprising syncoxa, basis and 5 - segmented endopod. Syncoxa with five setae on praecoxal endite and three setae on coxal endite. Basis with two endites, each armed with three apical setae. Endopod 5 - segmented; proximal endopodal segment developed, enditic-like; second and third segments partly fused; other segments divided; setal formula 4, 2, 2, 2, 2. Maxilliped (Figs 4 C, 8 E) well developed, 8 - segmented with syncoxa, basis and free 6 - segmented endopod. Syncoxa comprising praecoxa and coxa, completely fused; praecoxa with three endites; proximal and middle praecoxal endites each bearing one plumose seta, distal praecoxal endite with two plumose setae; coxa with one endite armed with one long plumose seta and two short, naked setae; oblique rows of spinules situated on posterior proximal of middle praecoxal endite and coxal endite. Basis elongated, armed with three plumose setae, inserted at distal 1 / 3 of medial margin and carrying rows of setules along medial margin and posterior face of segment. Endopod 6 - segmented, with setal formula 2, 3, 3, 3, 3 + 1, 4. P 1 - P 4 (Fig. 5 A-D) biramous, with 3 - segmented rami. Intercoxal sclerites of P 1 - P 4 naked on both frontal and caudal surfaces. First to second endopodal segments of P 1 - P 4 with pointed process on distolateral corners. Articulations between endopodal and exopodal segments ornamented with rows of tiny spinules. Armature of P 1 - P 5 as in Table 1. Basis of P 1 with distally pointed digitiform process on anterior; inner basal seta crooked, bilaterally spinulate, reaching to distal end of second endopodal segment; second exopodal segment with conspicuous spinulate process distally in outer distal corner of segment. Outer proximal spine on third exopodal segment of P 1 flagellate, other outer spines on P 2 - P 4 with serrate marginal membrane (s) as figured. Terminal spine on exopod of P 1 with naked outer margin and plumose internally; on P 2 and P 3 with serrate membrane externally and plumose internally; that on P 4 modified with row of large spinules on mid-inner margin and armed slender spinules on outer margin and distal part of inner margin (Figs 5 D, 9 A). P 5 (Figs 5 E, F, 8 F) biramous, with 3 - segmented exopod and 2 - segmented endopod, intercoxal sclerite smooth and unornamented. Basis small, 1.4 times as wide as long, with acute process on posterior surface near base of exopod. Exopod longer than endopod: tip of endopod only reaching to proximal inner seta on third exopodal segment. Distal endopodal segment 2.4 times as long as wide, armed with three inner, two apical and one outer naked setae. First and second exopodal segments each ornamented with a small pore on anterior surface at origin of outer spine. Distal exopodal segment 2.1 times as long as wide, bearing lateral spine (about 38 - 41 µm), subapical and apical spines of same length (about 51 - 54 µm); inner margin with four naked setae.	en	Tran, Duc Luong, Chang, Cheon Young (2020): First record of the genus Boholina (Copepoda, Calanoida, Pseudocyclopidae) in Vietnam, with description of a new species from an anchialine cave in Tra Ban Island. ZooKeys 977: 1-23, DOI: http://dx.doi.org/10.3897/zookeys.977.55040, URL: http://dx.doi.org/10.3897/zookeys.977.55040
A046CE435CFF5A769AE9C525E0BE4F31.taxon	description	Description of adult male. Body smaller than female, 756 - 825 µm long (mean 799 µm, N = 20). Ratio of prosome to urosome length about 2.7: 1 (Fig. 6 A, B). Prosome 5 - segmented as in female: cephalosome completely separated from ﬁrst pedigerous somite; second and third pedigerous somites with rounded ventroposterior corners; fourth and fifth pedigerous somites fused, with only marked articulation dorsolaterally; posterior corners of fifth pedigerous somites rounded in lateral view. Urosome 5 - segmented (Fig. 6 A-C), comprising genital somite, three free abdominal somites and anal somite. Genital somite slightly asymmetrical, distal part of right margin protuberant, slightly more expanded than left margin (Fig. 6 C); both lateral margins smooth; four sensilla along dorsoposterior margin; posterior margin with finely serrated hyaline membrane. Second to fourth free abdominal somites cylindrical, subequal in size; second and third somites with finely serrated hyaline membrane on posterior margin; fourth with posterior margin hyaline membrane expanded mid-dorsally to four large spines functioning as pseudoperculum concealing anal opening and mid-ventrally with finely serrated hyaline membrane on posterior margin. Anal somite short, ring-like, with posterior margin smooth. Caudal rami symmetrical, 1.5 - 1.6 times as long as wide (mean 1.57, N = 10), bearing distal spinous process dorsally and row of small setules on distal inner margin; ventral surface with a small pore near inner distal edge; ornamented six caudal setae, included to caudal setae II-VII and absent seta I. Antennules shorter than in female, asymmetrical. Left antennule non-geniculate, 24 - segmented and extending to middle area of pedigerous somite 5, armature segments as in female. Right antennule (Fig. 7 A) geniculate, 22 - segmented, extending to middle of last pedigerous somite; segments 13 - 18 broadened; segments 17 - 18 with knife-like projection on inner margins; armature formula as follows (s - setae, ae - aesthetasc): segment 1 (ancestral segment I) 1 s + 1 ae, segment 2 (II-IV) 6 s + 1 ae; segment 3 (V) 2 s + 1 ae; segment 4 (VI) 2 s; segment 5 (VII) 2 s + 1 ae; segment 6 (VIII) 2 s; segment 7 (IX) 2 s + 1 ae; segment 8 (X) 1 s + 1 ae; segment 9 (XI) 1 s + 1 ae; segment 10 (XII) 1 s; segment 11 (XIII) 1 s + 1 ae; segment 12 (XIV) 1 s + 1 ae; segment 13 (XV) 1 s + 1 ae; segment 14 (XVI) 1 s + 1 ae; segment 15 (XVII) 1 s + 1 ae; segment 16 (XVIII) 1 s; segment 17 (XIX) 1 s; segment 18 (XX) 1 s; segment 19 (XXI-XXIII) 2 s + 1 ae; segment 20 (XXIV-XXV) 4 s + 1 ae; segment 21 (XXVI) 2 s; segment 22 (XXVII-XXVIII) 5 s + 1 ae. Antennae, mouthparts and P 1 - P 4 as in female. P 5 (Figs 7 B, C, 9 E, F) strongly asymmetrical, biramous; coxae and intercoxal sclerite fused to form common base, without armed elements on anterior and posterior surface. Right P 5: basis about as long as wide, with slender outer basal seta located on posterior surfaces; exopod 2 - segmented, first segment with long bilaterally serrate outer spine (39 - 42 µm), distal segment large in base and tapering on the tip, slightly curved inward, inner margin smooth; outer margin armed with three spines, proximal serrated spine (48 - 51 µm), middle serrated spine (33 - 38 µm) and distal short spine vestige (9 - 11 µm), terminal spine absent; endopod forming an elongate lobe, about 3.8 times as long as wide, armed with two slightly sigmoid spines, apical spine 11 - 13 µm long and inner spine 8 - 9 µm, subdistally. Left P 5: basis robust, about 1.08 times as wide as long, with slender outer basal seta located on posterior surface; exopod 3 - segmented, ﬁrst segment with a long serrate outer spine (40 - 42 µm), second segment modiﬁed, bearing strongly reﬂexed spine (35 - 38 µm) on outer margin; third segment highly transformed bearing multiple short processes and one long, naked modified seta; endopod unarmed, forming an elongate rounded lobe, about 3.2 times as long as wide.	en	Tran, Duc Luong, Chang, Cheon Young (2020): First record of the genus Boholina (Copepoda, Calanoida, Pseudocyclopidae) in Vietnam, with description of a new species from an anchialine cave in Tra Ban Island. ZooKeys 977: 1-23, DOI: http://dx.doi.org/10.3897/zookeys.977.55040, URL: http://dx.doi.org/10.3897/zookeys.977.55040
