Enterocola hessei Chatton & Harant, 1924
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publication ID |
https://doi.org/ 10.11646/zootaxa.4978.1.1 |
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publication LSID |
lsid:zoobank.org:pub:9C7C1723-73EB-4FBE-A47A-54627DEB8F93 |
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DOI |
https://doi.org/10.5281/zenodo.10530942 |
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persistent identifier |
https://treatment.plazi.org/id/3729879B-FF27-FF33-FA93-FC71D1981A6E |
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treatment provided by |
Plazi |
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scientific name |
Enterocola hessei Chatton & Harant, 1924 |
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Enterocola hessei Chatton & Harant, 1924
( Figs. 123 View FIG , 124 View FIG )
Material examined. 3 ♀♀ (MNHN-IU-2014-21539, 1 ♀ dissected) from Clavelẚna lepadẚfçrmẚs (Müller, 1776), Saint-Vaast-la-Hougue, Atlantic coast of France, Monniot coll. ; 4 ♀♀ (MNHN-IU-2014-21540) from CK lepadẚfçrm ẚs, Roscoff, France .
Supplementary description of female. Body eruciform, straight, consisting of cephalosome, 5-segmented trunk, and incompletely 3-segmented genitoabdomen. Body length 2.21 mm; maximum width 664 μm (across sec- ond pedigerous somite). Cephalosome wider than long. First to fourth pedigerous somites each bearing distinct dorsal tergite; tergites simple, not forming dorsolateral folds; pedigerous somites each bearing pair of large, subglobular interpodal protrusions on ventral surface between left and right legs ( Fig. 123B View FIG , 124A, B View FIG ). Fifth pedigerous somite not articulated from fourth pedigerous somite. Anal somite bearing distinct anal prominence dorsally. Caudal rami ( Fig. 123C View FIG ) slightly divergent, well separated from each other, and clearly articulated from anal somite; each ramus sub-rectangular, unarmed, 2.27 times longer than wide (159×70 μm), gradually narrowing distally, with longer outer and shorter inner margins. Egg sac ( Fig. 123D View FIG ) L- or C-shaped, 2.0× 0.35 mm in measured sample, containing numerous eggs; each egg about 130 μm in diameter.
Rostrum absent. Antennule ( Fig. 123E View FIG ) about 135×83 μm, incompletely 2-segmented, gradually narrowing dis- tally; longer proximal segment with 1 small seta distally; distal segment armed with 12 unequal setae and 1 minute spinule, several of distal setae setule-like; longest seta 30 μm long. Antenna ( Fig. 123F View FIG ) about 245×100 μm, indis- tinctly 2-segmented; shorter proximal segment unarmed and unornamented; longer distal segment with rounded distal margin, ornamented with numerous minute spinules on convex anterior surface, and armed with 6 naked setae of lengths 31, 55, 50, 50, 94, and 107 μm, from medial to lateral (setae I-VI), respectively; shortest medial seta po- sitioned at 80% along medial margin of segment.
Labrum ( Fig. 123G View FIG ) subcircular, smooth, with pair of slender, spinulose palps. Mandible ( Fig. 123G View FIG ) setiform, spinulose, similar to labral palp. Maxillule consisting of precoxa and palp; precoxa ( Fig. 123H View FIG ) with 1 subdistal and 2 distal projections on distal sclerotized part and endite bearing 1 spinulose seta and about 10 thin setules; palmshaped palp ( Fig. 123I View FIG ) with 6 spinulose setae, 5 on distal and 1 on lateral margins, latter seta longer than distal setae. Maxilla ( Fig. 123J View FIG ) 2-segmented; proximal segment with 1 large smooth tubercle proximally on medial side and mediodistal endite bearing spinulose process; second segment unequally bifurcate distally, armed with 1 small spine proximally on posterior surface. Maxilliped absent.
Legs 1-4 each consisting of 2-segmented protopod and 1-segmented rami; protopods unarmed. Exopods shorter than endopods: exopods of legs 1, 2, and 3 with rudimentary articulation distally; exopod of leg 3 claw-like ( Fig. 124B View FIG ). Endopods each bearing 2 setae on distal margin, lateral seta longer than medial seta in legs 1-4. Endopodal segment 93×41, 102×48, 102×52, and 91×57 μm, respectively, in legs 1-4. Distal setae of leg 1 ( Fig. 124A View FIG ) endopod 159 (lateral) and 136 μm (medial), therefore, lateral seta about 1.7 times longer than endopodal segment and 1.17 times longer than medial seta. Distal setae of leg 3 endopod 184 (lateral) and 161 μm (medial). Proportional lengths of distal setae of endopods of legs 2 and 4 similar to those of leg 3.
Leg 5 ( Fig. 123K View FIG ) lamellate, smooth, wider than long (267×370 μm); armed with 2 minute setae, separated by distance of about 230 μm.
Male. Unknown.
Remarks. In her redescription of this species, Ooishi (2010a) mentioned or illustrated that (1) the ventral surface of the metasome bears 4 prominent pairs of interpodal protrusions, (2) the antennule is armed with 12 setae, (3) leg 1 endopod is 2.3 times longer than wide, and (4) the laterodistal seta of leg 1 endopod is 1.2 times longer than the mediodistal seta. These features are almost exactly the same as in our specimens. Some discrepancies, such as the slightly longer caudal rami (2.6 times longer than wide) are minor, while others such as the 5-segmented genitoabdomen in Ooishi’s specimens, may be due to the reproductive state of the material. Both Ooishi’s and our samples of this copepod species were collected from the ascidian Clavelẚna lepadẚfçrmẚs in the vicinity of the type locality.
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.