Kapalana kimbla, Berents & Lowry, 2018

Berents, Penelope B. & Lowry, J. K., 2018, The New Crustacean Amphipod Genus Kapalana from Australian Waters (Senticaudata, Ischyroceridae, Ischyrocerinae, Cerapodini), Records of the Australian Museum 70 (4), pp. 391-421 : 398-403

publication ID

https://doi.org/ 10.3853/j.2201-4349.70.2018.1711

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scientific name

Kapalana kimbla

sp. nov.

Kapalana kimbla sp. nov.

Figs 7 View Figure 7 , 8 View Figure 8

Holotype, male, 9.4 mm, MV J70496 View Materials , 26 km south-west of Cape Otway , Bass Strait, Victoria, Australia (39°01'00"S 143°22'06"E), 84 m, M. F. Gomon, 31 January 1981, MV Bass Strait Survey, BSS 120 S GoogleMaps . Paratypes, ovigerous female, 9.6 mm, MV J70497 View Materials ; male, 6.8 mm, MV J70498 View Materials ; male, 7.4 mm, MV J70499 View Materials ; male, 5.7 mm, MV J70500 View Materials ; male, 4.6 mm, MV J70501 View Materials ; male, 3.9 mm, MV J70502 View Materials ; same data as holotype. One female, 1 male, MV J11259 View Materials GoogleMaps , cove on south shore Leonard Point , Wilsons Promontory, Victoria, Australia, (39°01'30"S 146°17'30"E), 3 February 1982, WPNPA GoogleMaps . One male, 1 juvenile, MV J11295 View Materials , north east end Vancouver Peninsula , Western Australia, Australia, (39°03'24"S 117°56'012"E), 7 m, 8 April 1984, SWA 18. Many specimens, AM GoogleMaps P.99049, off Venus BaY township, Venus BaY, South Australia, Australia, (33°13'48"S 134°40'06"E), sand in channel, 3 m, G. C. B. Poore, 23 April 1985, SA 85 GoogleMaps .

400 Records of the Australian Museum (2018) Vol. 70

Additional material examined. Many specimens, MV J11297 View Materials , type locality, M. F. Gomon, 31 January 1981, MV Bass Strait Survey, BSS 120 S .

Type locality. 26 km south-west of Cape Otway , Bass Strait, Victoria, Australia (39°01'00"S 143°22'06"E) GoogleMaps .

Etymology. Named for HMAS Kimbla in recognition of many collections made for museums in Australia by this ship. Used as a noun in apposition.

Description. Based on Holotype, male, 9.4 mm, MV J70496 View Materials .

Head. Rostrum long, length 0.5 × head, forming a basal shoulder, apically acute; lateral cephalic lobe with ventral corner rounded, subocular margin deeply recessed, reaching beyond eye, anteroventral corner subquadrate, ventral margin horizontal, posterior margin vertical. Antenna 1 long, length 0.6 × body length; peduncle with scales; peduncular article 1 subequal to article 3, length 1.1 × peduncular article 3, not produced anterodistally and anteromedially, with strong sub-quadrate projection along posterior margin, posterodistal corner not produced; peduncular article 2 anterodistal corner without distal projection; flagellum 9-articulate; article 1 short. Antenna 2 length 1.1 × antenna 1; flagellum 9-articulate.

Epistome and upper lip fused, produced, broad base, apically subquadrate.

Pereon. Pereonite 1 with lateral keel. Pereonites 1–3 with sternal keel. Pereonite 5 length 2 × depth. Gnathopod 1 coxa not fused to pereonite 1, length 1.4 × depth, without anteroventral lobe; basis length 2.2 × depth; carpus broad, length 1.4 × depth with setose posterior lobe, propodus palm acute, robust setae absent. Gnathopod 2 carpochelate; coxa not fused to pereonite 2, length 1.8 × depth, without anteroventral lobe or cusp; basis short, broad, length 1.4 × breadth, without anteroproximal group of long slender setae; carpus long, length 1.1 × breadth, broad, with smooth posterior margin; palm shallowly excavate, anterodistal tooth large, located near articulation with propodus, posterodistal tooth well defined, medium length, length equal to width; propodus slender, curved, length 4.9 × width, without tooth on posterior margin, posterodistal corner smooth with 1 tooth; dactylus length 0.4 × propodus.

Pereopod 3 coxa not fused to pereonite 3, without anteroventral lobe, length 1.6 × depth; basis, length 1.9 × breadth, with proximal rounded anterodorsal corner, with simple setae along anterior margin, without denticles along anterior margin; ischium long, length 2 × breadth; merus length 1.1 × breadth, short, without ridges. Pereopod 4 coxa not fused to pereonite 4, length 2.3 × depth, with anterior lobe separated from several small anteroventral lobes; basis, length 1.6 × breadth, with simple setal group midway along anterior margin; ischium long, length 2.4 × breadth; merus long, length 1.5 × breadth. Pereopod 5 coxa, length 1.4 × depth, without patches of small setae, with setae along ventral margin few or absent; merus with anterior lobe not extending beyond anterior margin of carpus posterior lobe with 5 plumose setae; propodus with 3 setae along posterior margin; dactylus short, uncinate with 2 accessory hooks. Pereopod 6 coxa with setal fringe ventrally, without patches of small setae near margins; basis with patch of small setae near anterior margin; merus length 1.7 × breadth; dactylus short, uncinate, with 2 accessory hooks. Pereopod 7 coxa with posterodorsal lobe, without patch of small setae; merus length 2 × breadth; dactylus short, uncinate, with 2 accessory hooks.

Pleon. Pleopods 1–3 biramous, decreasing in size anteroposteriorly. Pleopod 1 inner ramus 10-articulate; outer ramus 7-articulate, article 1 evenly swollen. Pleopod 2 inner ramus reduced, 1-articulate; outer ramus broad, 3-articulate. Pleopod 3 inner ramus reduced, 1-articulate; outer ramus broad, 1-articulate. Uropod 1 biramous; peduncle length 1.3 × outer ramus; rami with distoventral fan of robust setae; outer ramus with lateral row of denticles, without medial and lateral setae, with large apical robust seta and smaller slender setae; inner ramus, length 0.6 × outer ramus, without medial setae, with 4 lateral setae. Uropod 2 uniramous, peduncle length 2.5 × breadth, 5 × length of ramus; ramus small with 5 denticles and 1 slender apical seta. Uropod 3 uniramous, peduncle length 1.7 × breadth; ramus with 3 curved hooks. Telson length 0.6 × breadth, weakly cleft (25 %), each lobe with 26–27 anteriorly directed hooks in 2 rows.

Female (sexually dimorphic characters). Based on female 9.6 mm, MV J.11297. Antenna 1 flagellum 10-articulate. Antenna 2 flagellum 10-articulate. Pereonite 1 without lateral keel. Pereonites 1–3 without sternal keel. Pereonite 5 length 1.5 × depth. Gnathopod 1 basis, length 2.2 × depth; carpus length 0.7 × depth with setose posterior lobe. Gnathopod 2 subchelate; coxa, length 1.6 × depth; basis, length 1.9 × breadth. Pereopod 5 coxa, length 1.4 × depth. Oostegites from gnathopod 2 to pereopod 5.

Tube. Granular, fine or coarse grained, tubes of juveniles attached in a ring, circling the tube of adult female.

Habitat. Sub-littoral (3–84 m depth).

Remarks. The shape of gnathopod 2 propodus and carpus changes as males grow, with the propodus becoming curved and slender in large males. In males less than 5 mm in length, gnathopod 2 is subchelate and the carpus has a straight posterior margin. In males longer than 5 mm, gnathopod 2 becomes carpochelate and the carpus develops an excavate posterior margin with the excavate margin becoming shallower and wider in large males longer than 9 mm.

Kapalana kimbla and K. amelga both have a strong subquadrate projection along the posterior margin of peduncular article 1 of antenna 1, a large apical robust seta on the inner ramus of uropod 1 and a shallow excavate palm on gnathopod 2. TheY differ in a number of characters including the posterior margin of the carpus of gnathopod 2 which is smooth in K. kimbla , but has a row of small spines in K. amelga . Kapalana kimbla is the only species with 3 curved hooks on uropod 3.

Distribution. Australia. Victoria: Bass Strait; Wilsons Promontory. South Australia: Venus Bay.


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