Heterochondria pillaii Ho, 1970
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https://doi.org/10.1080/002229300299372 |
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https://doi.org/10.5281/zenodo.10237825 |
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persistent identifier |
https://treatment.plazi.org/id/7A57A021-FFA9-FF9A-FEAF-FD00518BFE34 |
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Carolina |
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scientific name |
Heterochondria pillaii Ho, 1970 |
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Heterochondria pillaii Ho, 1970
( figures 7-8 View FIG View FIG )
Material examined. Thirty four adult ♀♀ (each with attached ♂) found on gill fi laments of their hosts: 25 from Pseudorhombus triocellatus (Bloch) (12 collected on 29 July 1994, two on 12 October 1994 and 11 on 29 April 1995), four from P. elevatus Obilby collected on 12 October 1994, two from P. arsius (Hamilton) collected on 29 April 1995, one from P. javanicus (Bleeker) collected on 12 October 1994, one from Cynoglossus dubius (Regan) collected on 14 February 1994 and one from C. lida collected on 26 December 1994.
Female. Body ( figure 7A View FIG ) elongated, cylindrical and measuring 2.52-5.71 mm long. Head ( figure 7B View FIG ) longer than wide, 910✕ 482 μ m (not including inflated antennule), with two lateral protrusions in front and one similar but smaller protrusion in rear. Neck region (first pediger) not marked off from trunk. Genital double somite ( figure 7C View FIG ) wider than long and bearing a lateral seta in egg sac attachment area. Abdomen ( figure 7C View FIG ) distinctly longer than wide. Caudal ramus ( figure 7C View FIG ) a spiniform, pointed process bearing three setae and a medial knob. Egg sac lengths variable, ranging from less than one-half of to more than twice body length.
Antennule ( figure 7D View FIG ) fl eshy, inflated, with a subterminal, posteroventra l protrusion; armature being 1-1-8 ( figure 7E View FIG , from proximal to distal). Antenna ( figure 7F View FIG ) two-segmented; proximal segment small, bearing a sclerotized process at base of terminal segment, which is a slender claw with corrugated surface in the distal third. Labrum ( figure 7G View FIG ) with denticles on posterior margin. Mandible ( figure 7H View FIG ) two-segmented; terminal blade with a row of 22 to 26 teeth on convex (inner) side and two rows of about 25 teeth on concave (outer) side. Maxillule ( figure 7I View FIG ) a small fl eshy lobe tipped with two short setae and a patch of spinules. Maxilla ( figure 7J View FIG ) two-segmented; first segment large but unarmed, second segment bearing in basal region one small, simple seta and one large seta with hyaline tip, and a row of about 30 teeth on terminal process. Maxilliped ( figure 7K View FIG ) three-segmented; first segment largest but unarmed, second segment expanded distally and bearing two rows of spines with terminal claw bending between them. Leg 1 ( figure 8A View FIG ) larger than leg 2 ( figure 8B View FIG ); both legs constructed on same plan with a long outer seta, a patch of spinules on distal surface, a small terminal seta, and a small nipple-like bud on medial surface.
Male. Body ( figure 8C View FIG ) 292 μ m long, with swollen cephalosome and cylindrical metasome and urosome. Genital somite with usual ventrolateral ridges and indistinguishably fused with abdomen ( figure 8D View FIG ). Caudal ramus as in female but naked. Antennule ( figure 8E View FIG ) reduced to a small rod tipped with few setae. Antenna ( figure 8F View FIG ) two-segmented; terminal segment a short, stout claw. Labrum ( figure 8G View FIG ) roughly as in female. Mandible ( figure 8H View FIG ) with fewer teeth on terminal blade, 15 on convex side and six on concave side. Paragnath ( figure 8I View FIG ) a small, spinulose lobe. Maxillule ( figure 8J View FIG ) as in female but lacking spinules. Maxilla ( figure 8K View FIG ) with seven teeth on terminal process. Maxilliped ( figure 8L View FIG ) generally as female except terminal teeth on second segment occurring in two patches rather than in two rows. Leg 1 ( figure 8C View FIG ) reduced to a simple spiniform seta as in Acanthochondria zebriae (see figure 2J View FIG ). Leg 2 absent.
Remarks. The most characteristic feature of H. pillaii is the possession of a nipple-like bud on the medial surface of leg 1 in the female (see figure 8A View FIG ) and a small, rod-like antennule in the male ( figure 8E View FIG ). Both of them are rather unusual for the species of Heterochondria . If the nipple-like bud on the female leg 1 was considered to represent the modi fi ed, reduced endopod, then H. pillaii could have been placed in Bactrochondria . However, the structure of leg 2 in the female of H. pillaii will de fi nitely preclude such consideration.
H. pillaii is the most common chondracanthid copepod parasitic on the six species of flatfishes in Kerala ( table 1 View Table 1 ). Thus, it is not surprising to see it being reported on Pseudorhombus arsius (Hamilton) from the Persian Gulf by Ho and Sey (1996).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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