Bonnierilla mollia Ho, 1984
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publication ID |
https://doi.org/ 10.11646/megataxa.4.1.1 |
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DOI |
https://doi.org/10.5281/zenodo.5699805 |
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persistent identifier |
https://treatment.plazi.org/id/03C487CB-EFA5-3AC3-FCEF-FE54FEFDF7D7 |
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treatment provided by |
Plazi |
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scientific name |
Bonnierilla mollia Ho, 1984 |
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( Figs. 163 View FIGURE 163 , 164 View FIGURE 164 )
Material examined. 1 ♀ (dissected and figured) from Polycarpamytiligera (Savigny, 1816) , Chesterfield Corail II cruise, Stn DW164, (19°41.5’S 158°18.8’E), 2 August 1988.
Description of female. Body ( Fig. 163A View FIGURE 163 ) compressed. Body length about 4.1 mm. Prosome inflated lengthwise, consisting small cephalosome and unsegmented metasome. Metasome graduallynarrowing in posterior half (in lateral view): cuticle soft, covered with mucus-like material. Free urosome ( Fig. 163B View FIGURE 163 ) 5- segmented; articulation between last 2 abdominal somites obscure. Caudal rami divergent and widely separated from each other; each ramus ( Fig. 163C View FIGURE 163 ) tapering, about 2.3 timeslongerthan wide (233×100 μm), armedwith 6 small naked setae; outer lateral and dorsal setae located at 31 and 49% of ramus length, respectively.
Rostrum weakly defined, destroyed during dissection. Antennule ( Fig. 163D View FIGURE 163 ) 6-segmented, third segment bearing traces of 2 segmental articulations; armature formula 3, 15, 15+2 aesthetascs, 2, 2+aesthetasc, and 7+aesthetasc; all setae naked. Antenna 4-segmented ( Fig. 163E View FIGURE 163 ); coxa and basis unarmed; first endopodal segment with 1 small seta subdistally; compound distal endopodal segment about 3 times longer than wide, armed with 6 small setae plus small terminal claw less than half length of segment.
Labrum ( Fig. 163F View FIGURE 163 ) with prominent, naked posteromedial lobe; posterolateral surfaces setulose. Mandible ( Fig. 163G View FIGURE 163 ) with 5 teeth and 1 proximal seta on coxal gnathobase; basis and first endopodal segment fused, armedwith 5 setae (arranged 1 + 4); second endopodal segment with 9 setae; exopod with 5 setae, 2 distalsetae unequal in length, both shorter than other 3. Paragnath ( Fig. 163H View FIGURE 163 ) bearing 2 dentiform processes apically. Maxillule ( Fig. 163I View FIGURE 163 ) as usual for genus: 9 setae on arthrite, 3 on basis, and 4 each on exopod and endopod. Maxilla ( Fig. 163J View FIGURE 163 ) 5-segmented; syncoxawith 9 setae (3, 1, 2, and 3), basis with spinulose claw plus 2 setae (1 minute); endopodwith 1, 1, and 3 setaeonfirst to third segments, respectively. Maxilliped ( Fig. 163K View FIGURE 163 ) incompletely 2-segmented with 10 setaeonfirst segment and 2 on second.
Legs 1–4 with 3 segmented rami ( Fig. 164 View FIGURE 164 A-C). Leg 1 as usual for genus. Inner coxal seta present only in legs 3 and 4. Exopods of legs 2–4 swollen, more than twice as long as endopods, and characteristically armed only with inner setae, lacking outer and distal spines. Third exopodal segment of legs 2–4 with rounded outer and distal margins. Endopods of legs 2–4 not extending beyond distal border of first exopodal segment. Armature formula for legs 1–4 as follows:
| Coxa | Basis | Exopod | Endopod | |
|---|---|---|---|---|
| Leg 1 | 0-0 | 1-I | I-1; I-0; III, I, 4 | 0-1; 0-1; 1, 2, 3 |
| Leg 2 | 0-0 | 1-0 | 0-1; 0-1; 0, 0, 5 | 0-1; 0-2; 1, 2, 3 |
| Leg 3 | 0-1 | 1-0 | 0-1; 0-1; 0, 0, 5 | 0-1; 0-2; 1, 2, 3 |
| Leg 4 | 0-1 | 1-0 | 0-1; 0-1; 0, 0, 5 | 0-1; 0-2; 1, 2, 2 |
Leg 5 ( Fig. 163L View FIGURE 163 ) 2-segmented; protopod short with small, thin outer distal seta and inner distal row of minute spinules; exopodal segment about 4 timeslongerthan wide (389×98 μm), widestatproximal third; armedwith 1 small, thin apical seta, and ornamented with 7 groups of minute spinules along inner margin.
Male. Unknown.
Remarks. This species is characterised by the lack of outer spines on the exopods of legs 2–4. No significant differences were found between the original description of this species by Ho (1984) and our single female from New Caledonia. The type locality of this species is Sado Island in Japan.
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.