17,420 research outputs found
Bactrochondria Ju-Shey, 2000, gen. nov.
No full textGenus <i>Bactrochondria</i> gen. nov. <p> <i>Female.</i> Body elongate, cylindrical. Head consisting of cephalosome only. Neck region short, composed of ®rst pediger. Remaining prosomal somites fused into a cylindrical trunk, without processes. Genito±abdomen and caudal ramus as usual form in family. Egg sac cylindrical, nearly as long as body. Antennule lobate. antenna uncinate. Oral appendages as in usual form, except with subchelate maxilliped. Two pairs of legs modi®ed; leg 1 large, bilobate; leg 2 reduced to two rami without protopod.</p> <p> <i>Male.</i> Dwarf. Cephalosome fused with ®rst pediger and globose. Genito± abdomen carrying at its end a pair of reduced, spiniform caudal rami. Antennule slender and cylindrical. Antenna uncinate and robust. Oral appendages as in female, except maxilliped with much reduced terminal claw. Legs 1 and 2 reduced to a seta and a lobe or missing.</p> <p> <i>Etymology.</i> The generic name is a combination of the Greek words <i>bactro</i> (= a stick, cane) and <i>chondria</i> (= cartilage, used as su x in many genera of Chondracanthidae). It alludes to the rod-like appearance of the elongated trunk of this genus of parasites.</p> <p> <i> Type species. <i>Bactrochondria papilla</i> sp. nov.</i></p> <p> <i>Remarks.</i> This genus is closely allied with <i>Heterochondria</i> YuÈ, 1935, having in the female an elongate, cylindrical trunk without processes and, in the male, lacking leg 2. However, the structure of legs in the female (blunt lobe vs. pointed lobe with medial bud) and the antennule in the male (absent or reduced vs. normal and ®liform) indicate that they are from diOEerent clades of the Chondracanthidae.</p> <p> In his revision of the chondracanthid genera, Ho (1970) was perplexed by the incomplete information on <i>Pseudochondracanthu s</i> <i>longitruncus</i> Yamaguti, 1939 and <i>Pseudochondracanthus</i> sp. Pillai, 1964 and could only be certain that they are not attributable to <i>Pseudochondracanthus</i> Wilson, 1908. However, in the end, Ho (1970: 195) suggested placing both of them tentatively in <i>Ceratochondria</i> YuÈ, 1938. Ho’s suggestion was accepted by Pillai (1985) who renamed it as a new species of <i>Ceratochondria, C. hoi</i> sp. nov. With the establishment of this new genus, it became clear that both <i>Pseudochondrcanthu s longitruncu s</i> and <i>Ceratochondri a hoi</i> are attributable to <i>Bactrochondria</i>. Interestingly, both of them are parasites of tongue®sh (Cynoglossidae) as in the type species of the new genus.</p>Published as part of <i>Ju-Shey, 2000, Chondracanthid copepods parasitic on flatfishes of Kerala, India, pp. 709-735 in Journal of Natural History 34 (5)</i> on pages 713-714, DOI: 10.1080/002229300299372, <a href="http://zenodo.org/record/10083161">http://zenodo.org/record/10083161</a>
Contribution of Ju-shey Ho to the systematics of symbiotic copepods of Japan
No full textNagasawa, Kazuya, Tang, Danny, Uyeno, Daisuke, Madinabeitia, Ione (2013): Contribution of Ju-shey Ho to the systematics of symbiotic copepods of Japan. Journal of Natural History 47 (5-12): 517-527, DOI: 10.1080/00222933.2012.742586, URL: http://dx.doi.org/10.1080/00222933.2012.74258
Caligus lini n. sp., a new caligid (Copepoda, Siphonostomatoida) parasitic on the brilliant pomfret Eumegistus illustris Jordan & Jordan (Perciformes, Bramidae) of Taiwan
No full textHo, Ju-Shey, Cheng, Yu-Rong (2016): Caligus lini n. sp., a new caligid (Copepoda, Siphonostomatoida) parasitic on the brilliant pomfret Eumegistus illustris Jordan & Jordan (Perciformes, Bramidae) of Taiwan. Zootaxa 4079 (1), DOI: 10.11646/zootaxa.4079.1.
Heterochondria petila Ju-Shey, 2000, sp. nov.
No full text<i>Heterochondria petila</i> sp. nov. <p>(®gures 9±10)</p> <p> <i>Material examined.</i> One hundred and thirty-six adult mm (each with attached l) found on gill ®laments of their hosts: 124 from <i>Pseudorhombus arsius</i> (four collected on 11 March 1994, ®ve on 20 July 1994, 12 on 12 October 1994, 23 on 26 December 1994, 90 on 29 April 1995), nine from <i>P. javanicus</i> (®ve collected on 12 October 1995 and four on 25 December 1995) and three from <i>P. triocellatus</i> collected on 12 October 1994. Holotype (USNM 285486) and 30 paratypes (USNM 285486) have been deposited in the US National Museum of Natural History, Smithsonian Institution, Washington, DC and the remaining paratypes and other specimens in the author’ s (IHK) collection.</p> <p> <i>Female.</i> Body (®gure 9A) elongated and cylindrical, measuring 2.85±3.73 mm. Head (®gure 9B) longer than wide, 610Ö 360 <i>m</i> m (not including ināted antennule), with round, lateral protrusion in front and rear; in lateral view posterior (oral) region thicker than anterior (antennal) region (®gure 9C). Neck region (®rst pediger) distinct. Trunk slightly wider in posterior region. Genital double somite (®gure 9D) wider than long, carrying egg sacs on its ventral surface (®gure 9E). Abdomen (®gures 9D, E) globose. Caudal ramus (®gures 9D, E) a spiniform, pointed process bearing three setae and a small, medial lobe. Egg sac (®gure 9A) about as long as trunk.</p> <p>Antennule (®gure 9F) ¯eshy, with greatly ināted basal portion; armature being 1-1-1-2-8. Antenna (®gure 9G) two-segmented; proximal segment small, with a round, distal protrusion; terminal segment a slender, uncinate hook bearing ®ne annuli in distal portion. Labrum (®gure 9H) with denticles on posterior margin. Mandible (®gure 10A) two-segmented; terminal blade with a row of about 80 teeth on convex (inner) side and two rows of about 40 teeth on concave (outer) side. Paragnath (®gure 10B) a small lobe with spinules on distal surface. Maxillule (®gure 10C) a spinulose lobe tipped with two small setae. Maxilla (®gure 10D) twosegmented; ®rst segment larger but unarmed, second segment bearing in basal region one small, simple seta and a large seta with hyaline tip, and a row of more than 30 teeth on terminal process. Maxilliped (®gure 7K) three-segmented; ®rst segment largest but unarmed, second segment expanded distally and bearing two groups of spines with terminal claw bending between them. Leg 1 (®gure 10F) a large, ¯eshy process bearing a small medial, basal protrusion; outer surface with a regular, long seta and inner surface with two small setae near basal protrusion and ®ve short setae on distal portion, of which the middle three are on a small knob. Leg 2 (®gure 10G) small, less then one-half of leg 1, armed with a regular long, outer seta and two small, distal setae.</p> <p> <i>Male.</i> Body (®gure 10H) 288 <i>m</i> m long, with swollen cephalosome and cylindrical metasome and urosome. Genital somite with usual ventrolateral ridges but indistinguishably fused with abdomen (®gure 10I). Caudal ramus as in female but armed with only a small, basal knob on ventral surface. Antennule absent. Antenna (®gure 10J) two-segmented; terminal segment a short, stout claw. Labrum (®gure 10K) with smooth posterior margin. Mandible (®gure 10L) with fewer teeth on terminal blade, 18 on convex side and three on concave side. Maxillule (®gure 10M) tipped with a knob and two setae. Maxilla (®gure 10N) with only three teeth on terminal process. Maxilliped (®gure 10O) generally as female except terminal teeth on second segment occurring in one patch and distal claw (third segment) with a subterminal hooklet. Leg 1 represented by two minute setae (see ®gure 10H) and leg 2 missing.</p> <p> <i>Etymology.</i> The speci®c name <i>petila</i> is Latin (= thin, slender), it refers to the reduction of leg 2 relative to leg 1.</p> <p> <i>Remarks.</i> Currently, seven species of <i>Heterochondria</i> are known, including the present new species. It is interesting to note that the ®ve species occurring in Asia are parasitic only on ¯at®shes, whereas the other two occurring elsewhere are not. <i>Heterochondria atypica</i> Ho, 1972 from California is found on wrasses (Labridae) and <i>H. crassicornis</i> (Krùyer, 1835) from the Gulf of Mexico and Caribbean Sea, on wrasses and damsel®shes (Pomacentridae) (Ho, 1972). Furthermore, while those ®ve species from ¯at®shes have a long head and trunk, those on other ®shes diOEer in having a square head and short trunk.</p> <p> <i>Heterochondria longicephalus</i> (YuÈ and Wu, 1932) and <i>H. longa</i> Tripathi, 1959 were not adequately treated in their original description and have not been recorded again since their discovery. Thus, no comparison can be made with them. Both of them were taken from <i>Pseudorhombus arsius</i>, <i>H. longicephalus</i> from Amoi, China, and <i>H. longa</i> from Madras, India.</p> <p> <i>Heterochondria petila</i> can be distinguished from <i>H. pillaii</i> and <i>H. similis</i> by having: (1) a median ratio (length/width) for trunk (6.98 vs. 11 in <i>pillaii</i> and 3.58 in <i>similis</i>); (2) two pairs of unequal legs with leg 2 distinctly smaller than leg 1 (see ®gure 9C); (3) more teeth on the mandible and maxilla; and (4) no antennule in the male.</p>Published as part of <i>Ju-Shey, 2000, Chondracanthid copepods parasitic on flatfishes of Kerala, India, pp. 709-735 in Journal of Natural History 34 (5)</i> on pages 723-726, DOI: 10.1080/002229300299372, <a href="http://zenodo.org/record/10083161">http://zenodo.org/record/10083161</a>
Acanthochondria zebriae Ju-Shey, 2000, sp. nov.
No full text<i>Acanthochondria zebriae</i> sp. nov. <p>(®gures 1±2)</p> <p> <i>Material examined.</i> Twenty-four adult and three juvenile mm (19 with attached l) on gill ®laments of <i>Zebrias synaturoide s</i> (Gilchrist): four adults and three juveniles collected on 11 March 1994 and 20 adults collected on 26 December 1994. Holotype (USNM 285490) and eight paratypes (USNM 285491) have been deposited in the US National Museum of Natural History, Smithsonian Institution, Washington, DC and the remaining paratypes and other specimens kept in the junior authors’ (IHK) collection.</p> <p> <i>Female.</i> Body (®gure 1A) elongated and cylindrical, measuring 1.69±1.94 mm long. Head (®gure 1B) longer than wide, 403Ö 273 <i>m</i> m (not including ināted antennule), with small rounded knob at each anterolateral corner and ventrally protruded oral region (®gure 1C). First pediger narrower than head. Second pediger with remaining prosomal somites fused into a long, cylindrical trunk bearing a pair of posterolateral processes (®gures 1D, E). Genital double somite slightly longer than wide, 135Ö 123 <i>m</i> m, and abdomen distinctly wider than long, 37Ö 65 <i>m</i> m. Caudal ramus (®gure 1D) a spiniform, pointed process bearing four setae. Egg sac about as long as trunk.</p> <p>Antennule (®gure 1F) ¯eshy and ināted; armature being (from proximal to distal) 1-1-2-2-2-7. Antenna (®gure 1G) two-segmented; terminal segment sharply curved and covered with minute tubercles on terminal area of basal half before bend. Labrum with smooth, straight posterior margin. Mandible (®gure 1H) twosegmented; terminal blade with 31 to 33 teeth on convex (inner) side and 28 to 32 teeth on concave (outer) side. Paragnath (®gure 1I) a small spinulose lobe. Maxillule (®gure 1J) with two terminal elements. Maxilla (®gure 1K) two-segmented; ®rst segment robust and unarmed; second segment bearing one small, simple, basal seta, one large seta with hyaline tip and a row of 22 to 29 teeth on terminal process. Maxilliped (®gure 2A) three-segmented; ®rst segment largest but unarmed, second segment with long spines on greatly protruded inner distal corner, and terminal segment reduced to a small hook situated opposite to tuft of spinules on inner-distal corner of second segment. Both leg 1 (®gure 2B) and leg 2 (®gure C) nearly unilobate, with ināted, bluntly pointed exopod continuous with protopod and carrying a much reduced endopod tipped with a seta. Terminal region of exopod with six setae on leg 1 and four setae on leg 2.</p> <p> <i>Male.</i> Body (®gure 2D) 217 <i>m</i> m long, with swollen cephalosome and cylindrical metasome and urosome. Genital somite (®gure 2E) with usual ventrolateral ridges. Abdomen (®gure 2E) indistinguishably fused with genital segment. Caudal ramus as in female but naked. Antennule reduced to a simple seta (see ®gure 2D). Antenna (®gure 2F) with small seta on basal segment and a conical process on basal part of terminal hook. Mandible (®gure 2G) with fewer teeth on terminal blade, 17 on convex side and ten on concave side. Maxilla (®gure 2H) with eight or nine teeth on inner side and single one on outside of terminal process. Maxilliped (®gure 2I) essentially as in female, but terminal claw relatively larger. Leg 1 (®gures 2D, J) reduced to a simple spiniform seta. Leg 2 absent.</p> <p> <i>Etymology.</i> The speci®c name <i>zebriae</i> refers to the host of the present species.</p> <p> <i>Remarks.</i> According to Ho and Kim’s (1995) designation of the variable appendages useful in species identi®cation in the genus <i>Acanthochondria</i>, the antennule of the new species belongs, undoubtedly, to Type G±I, but its legs do not ®t well to any of the ®ve types. Basically, the legs of <i>A. zebriae</i> are attributable to Type A, but no species of <i>Acanthochondria</i> with Type A leg has its endopods on both legs 1 and 2 reduced to a small knob as in the present species. Furthermore, no species of <i>Acanthochondria</i> has the male with leg 2 missing and leg 1 reduced to a spiniform seta. The subchelate female maxilliped is another unusual feature of the present species.</p>Published as part of <i>Ju-Shey, 2000, Chondracanthid copepods parasitic on flatfishes of Kerala, India, pp. 709-735 in Journal of Natural History 34 (5)</i> on page 711, DOI: 10.1080/002229300299372, <a href="http://zenodo.org/record/10083161">http://zenodo.org/record/10083161</a>
High diversity of Caligus species (Copepoda: Siphonostomatoida: Caligidae) in Taiwanese waters
No full textHo, Ju-Shey, Lin, Ching-Long, Liu, Wei-Cheng (2016): High diversity of Caligus species (Copepoda: Siphonostomatoida: Caligidae) in Taiwanese waters. Zootaxa 4174 (1): 114-121, DOI: http://doi.org/10.11646/zootaxa.4174.1.
FIGURE 1. Caligus lini n in Caligus lini n. sp., a new caligid (Copepoda, Siphonostomatoida) parasitic on the brilliant pomfret Eumegistus illustris Jordan & Jordan (Perciformes, Bramidae) of Taiwan
No full textFIGURE 1. Caligus lini n. sp., female. A, habitus, dorsal; B, genital complex and abdomen, ventral; C, caudal ramus, dorsal; D, antennule. Scale bars: 0.5 mm in A and B; 0.05 mm in C and D.Published as part of Ho, Ju-Shey & Cheng, Yu-Rong, 2016, Zootaxa 4079 (1), DOI: 10.11646/zootaxa.4079.1.2, http://zenodo.org/record/26218
FIGURE 2. Caligus lini n in Caligus lini n. sp., a new caligid (Copepoda, Siphonostomatoida) parasitic on the brilliant pomfret Eumegistus illustris Jordan & Jordan (Perciformes, Bramidae) of Taiwan
No full textFIGURE 2. Caligus lini n. sp., female. A, antenna and post-antennal process; B, maxillule; C, maxilla; D, maxilliped; E, sternal furca; F, mandible. Scale bars: 0.1 mm in A, C, and D; 0.05 mm in B, E, and F.Published as part of Ho, Ju-Shey & Cheng, Yu-Rong, 2016, Zootaxa 4079 (1), DOI: 10.11646/zootaxa.4079.1.2, http://zenodo.org/record/26218
FIGURE 2. Acanthochondria cyclopsetta Pearse, 1952 in Acanthochondria cyclopsetta Pearse, 1952 and A. alleni n. sp. (Copepoda; Cyclopoida; Chondracanthidae) from flatfish hosts of the U. S. A., with comments on the taxonomic position of A. zebriae Ho, Kim & Kumar, 2000 and A. bicornis Shiino, 1955 and the validity of Pterochondria Ho, 1973
No full textFIGURE 2. Acanthochondria cyclopsetta Pearse, 1952, adult female. (A) antenna, anterior; (B) labrum, ventral; (C) mandible, dorsal; (D) maxillule, dorsal; (E) maxilla, posterior; (F) maxilliped, posterior; (G) leg 1, with enlarged view of surface ornamentation and exopod tip, ventral. Scale bars: A–B, F, 100 µm; C–E, 50 µm; G, 200 µm.Published as part of Tang, Danny, Kalman, Julianne E. & Ho, Ju-Shey, 2010, Acanthochondria cyclopsetta Pearse, 1952 and A. alleni n. sp. (Copepoda; Cyclopoida; Chondracanthidae) from flatfish hosts of the U. S. A., with comments on the taxonomic position of A. zebriae Ho, Kim & Kumar, 2000 and A. bicornis Shiino, 1955 and the validity of Pterochondria Ho, 1973, pp. 18-32 in Zootaxa 2657 on page 21, DOI: 10.5281/zenodo.19894
Figure 4 in Four species of Caligus Müller, 1785 (Copepoda, Siphonostomatoida, Caligidae) parasitic on marine fishes of Taiwan
No full textFigure 4. Caligus dasyaticus Rangnekar, adult female. (A) Leg 1; (B) leg 2; (C) leg 3; (D) leg 4.Published as part of Ho, Ju-Shey, Lin, Ching-Long & Chang, Wen-Been, 2007, Four species of Caligus Müller, 1785 (Copepoda, Siphonostomatoida, Caligidae) parasitic on marine fishes of Taiwan, pp. 401-417 in Journal of Natural History 41 (5-8) on page 407, DOI: 10.1080/00222930701203853, http://zenodo.org/record/458213
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