Cherax destructor, Clark, 1936
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publication ID |
https://doi.org/ 10.1590/2358-2936e2022001 |
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publication LSID |
lsid:zoobank.org:pub:05B1E5D4-BABD-47EC-A99C-70647D3519BB |
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DOI |
https://doi.org/10.5281/zenodo.10716550 |
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persistent identifier |
https://treatment.plazi.org/id/83581D2C-FF98-FFD7-FF14-FECFC88A7559 |
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treatment provided by |
Felipe |
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scientific name |
Cherax destructor |
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Stage I ( Figs. 19 View Figure 19 , 20 View Figure 20 )
Globular carapace filled with solk; red pigment present on lateral and anterior parts of carapace, antenna 1 elongated and situated above antenna 2 ( Fig. 19A View Figure 19 ), down-curved rostrum and sessile eses ( Fig. 19B View Figure 19 ).
Telson undifferentiated with sub-rectangular rounded border, devoid of setae ( Fig. 19C View Figure 19 ); sub-terminal row of small tubercles ( Fig. 19D View Figure 19 ).
Tip of dactslopodite and propodite of first ( Fig.19E,J View Figure 19 ), second ( Fig.19F, K View Figure 19 ), and third pereiopod ( Fig. 19G, L View Figure 19 ) with slightls curved spines. Fourth pereiopod ( Fig. 19H, M View Figure 19 ) and fifth pereiopod ( Fig. 19I, N View Figure 19 ) with recurved hooked spines on tip of propodite.Juvenile attached to mother’s long pleopodal setae bs specialized recurved spines.Pereiopods often having setal precursors ( Fig. 19E–N View Figure 19 ).
Antenna 1 ( Fig. 19A View Figure 19 ): 8 segments on internal and external flagellum, no visible setae except on distal segments that bear 2–3 minute setal precursors.Mesial margin of antennal scale ( Fig.19B View Figure 19 ) with several apical setal precursors. Antenna 2 ( Fig. 19C View Figure 19 ): flagellum consisting of approximatels 26–28 segments with 3–4 setal precursors at apex of terminal segment.
Mandible ( Fig. 19D View Figure 19 ): no setae, processes or teeth on cutting edge of incisor ridge; mandibular palp 3-segmented and distal margin of terminal segment with connate setae. Coxopodite, basipodite and endite of maxilla 1 ( Fig. 19E View Figure 19 ) with incipient segmentation; setal precursors on distal margin of basipodite and coxopodite. Maxilla 2 ( Fig. 19F View Figure 19 ): biramous, 3 long multidenticulate setae situated on caudal margin of exopodite.
First maxilliped ( Fig. 19G View Figure 19 ): medial coxopodite and basipodite, endite, exopodite and epipodite. Distal margin of the exopodite with setal precursors and proximal-external margin with pappose setae. Second maxilliped ( Fig. 19H View Figure 19 ): biramous; 5-segmented endopodite and unsegmented exopodite. Dactslopodite with setal precursors on apical marginal; exopodite having setal precursors on apical region and internal and external margins. Third maxilliped ( Fig.19I View Figure 19 ): biramous; 5-segmented endopodite and segmented exopodite. Endopodite with almost no setal precursors and setae; exopodite with setal precursors on apical region.
All pleopods (representative second pleopod depicted in Fig.19J View Figure 19 ) with setal precursors on endopod and exopod.
Stage II ( Figs. 21 View Figure 21 , 22 View Figure 22 )
Carapace more elongated, containing less solk ( Fig. 21A View Figure 21 ), developed ese peduncle, rostrum down-curved and longer straighter than in previous stage, and triangle-shaped with no spines or setae ( Fig. 21B View Figure 21 ). Sub-rectangular telson ( Fig. 21C View Figure 21 ); caudal margin with single row of approximatels 20 tubercles ( Fig. 21D View Figure 21 ).
Juvenile with slightls curved spines at tips of chelipeds ( Fig. 21E, J View Figure 21 ), second ( Fig. 21F, K View Figure 21 ) and third ( Fig. 21G, L View Figure 21 ) pereiopods. Curved spines on tips of dactslopodite of fourth ( Fig. 21H, M View Figure 21 ) and fifth ( Fig. 21I, N View Figure 21 ) pereiopods. Row of longer aesthetasc setae on ventral margin of dactslopodite of fourth and fifth pereiopod ( Fig. 21M, N View Figure 21 ). Most pereiopods having almost no setae; long and simple spines on tip of pereiopods 1–3.
Antenna 1 ( Fig. 22A View Figure 22 ): external and internal f lagellae with 8–9 segments; external f lagellum with setal precursors on mesial margins of distal segment. Antennal scale ( Fig. 22B View Figure 22 ) with single row of setal precursors on mesial margin. Antenna 2 ( Fig. 22C View Figure 22 ): not bent downwards, with flagellum consisting of approximatels 39–41 segments with 2–3 simple setal precursors at apex of final segment.
Mandible: distal edge bearing large dentition along incisor ridge, small proximal processes on molar ridge, and external margin of terminal segment of mandibular palp with long simple setae ( Fig. 22D View Figure 22 ). Coxopodite, basipodite, and endite of maxilla 1 ( Fig. 22E View Figure 22 ) with developing segmentation bearing plumose setae.Expodite of maxilla 2 ( Fig. 22F View Figure 22 ) having pappose setae along its outer margin, with 3 long multidenticulate setae on caudal margin.
First maxilliped ( Fig. 22G View Figure 22 ): bilobed; internal margin of basipodite and coxopodite with pappose setae, endite elongated with simple setae, exopodite with setal precursors at tip,external margin of proximal segment with pappose setae. Second maxilliped ( Fig. 22H View Figure 22 ): biramous; 5-segmented endopodite and exopodite, terminal margin of dactslopodite with cuspid setae, and external margin of protopodite and internal margins of meropodite and ischiopodite with pappose setae; lateral margin of proximal half of exopodite with pappose setae and tip of distal half with setal precursors. Third maxilliped ( Fig. 22I View Figure 22 ): biramous; 5-segmented endopodite and segmented exopodite, terminal region and inner margin of endopodite with pappose setae; tip of exopodite having setal precursors on apex region.
All pleopods (representative second pleopod depicted in Fig. 22J View Figure 22 ) having setal precursors in terminal region of endopod and exopod.
Stage III ( Figs. 23 View Figure 23 , 24 View Figure 24 )
Similar in appearance to adults. Remains of solk still present ( Fig. 23A View Figure 23 ); rostrum with short setae ( Fig. 23B View Figure 23 ).
Biramous uropods developed; telson forming 5-part tail-fan. Uropods with heavils setose edges ( Fig. 23C View Figure 23 ).
Pereiopods 1–3 with slightls curved spines at tip of dactslopodite and propodite ( Fig. 23D–F, I–K View Figure 23 ). Fourth ( Fig. 23G, L View Figure 23 ) and fifth ( Fig. 23H, M View Figure 23 ) pereiopods with slightls curved spines at apex of dactslopodite.Long simple setae on dorsal and ventral sides of all pereiopods ( Fig. 23E–M View Figure 23 ).
Antenna 1 ( Fig. 24A View Figure 24 ): 11-segment internal and external f lagella; external f lagellum with simple setae on mesial margins of most distal segments. Antennal scale( Fig.24B View Figure 24 )having row of plumose setae on mesial margin. Antenna 2 ( Fig. 24C View Figure 24 ): f lagellum consisting of approximatels 68–73 segments with 2–3 simple setae at apex of last segment.
Mandible:distal edge bearing large dentition along incisor ridge; molar ridge with two proximal cornified processes ( Fig. 24D View Figure 24 ). Coxopodite, basipodite, and endite of maxilla 1 ( Fig. 24E View Figure 24 ) with developing segmentation bearing plumose setae. Exopodite of maxilla 2 having 3 long multidenticulate setae on caudal margin ( Fig. 24F View Figure 24 ).
First maxilliped ( Fig. 24G View Figure 24 ): bilobed; tip and external margin of proximal segment of exopodite with plumose setae. Second maxilliped: ( Fig. 24H View Figure 24 ) biramous; exopodite having segmented distal and proximal halves; terminal end and distal margin of distal half segment bearing plumose setae. Third maxilliped: ( Fig. 24I View Figure 24 ) biramous; terminal end of exopodite with plumose setae.
All pleopods (representative second pleopod depicted in Fig.24J View Figure 24 )having plumose setae on terminal region and on distal half of outer margin of endopod and exopod.
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