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FIGURE 5 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation

FIGURE 5. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, G1 ventral view; b, G1 dorsal view; c, G2 ventral view. Scale bar equals 1 mm (a,b), 2 mm (c).

FIGURE 6 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation

FIGURE 6. View of Man's Crater Lake Manengouba, Cameroon, showing the steep forested slopes that include the stream habitat of Louisea balssi (Bott, 1959).

FIGURE 3 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation

FIGURE 3. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, right chela frontal view; b, left chela frontal view; c, right cheliped carpus showing the first (distal) and second (proximal) carpal teeth; d, right cheliped merus showing the inferior margin with the large and prominent distal tooth and the toothed margin. Scale bar equals 5 mm (a, b), 2 mm (c, d).

FIGURE 4 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation

FIGURE 4. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, third maxilliped showing the faint vertical groove on the ischium, and the absence of a flagellum on the exopod; a, frontal view of right mandible showing small hard setose process at the junction between the palp segments; b, ventral view of the right mandible. Scale bar equals 2 mm (a), 1 mm (c, d).

FIGURE 2 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation

FIGURE 2. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319). a, carapace dorsal view; b, carapace, frontal view; c, thoracic sternite. Scale bar equals 5 mm (a,b,c).

FIGURE 1 in Lost species in Cameroon: rediscovery of the endangered freshwater crab, Louisea balssi (Bott, 1959) (Brachyura: Potamonautidae), with notes on its ecology and conservation

FIGURE 1. Louisea balssi (Bott, 1959), adult male CW 16.2 mm from Man's Crater Lake Manengouba, Cameroon (ZMB Crust. 30319) (missing left periopod 5). Dorsal view of whole animal showing color when freshly collected. Scale bar equals 8 mm.

FIGURE 13 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 13. Developmental sequence of gastrozooids (A), showing tentacle bud for each of the gastrozooid growth stage respectively (B–D). Scale bars: A. 500 µm; B. 50 µm; C. 100 µm; D. 200 µm.

FIGURE 10. Loose Type D in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 10. Loose Type D bract of Agalma clausi from BWP Dive 1044-11. Scale bar: 1 mm. (With grateful thanks to Ron Gilmer).

FIGURE 12 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 12. Morphology of gastrozooid. bas—basigaster, hs—hepatic stripes, tc—tentacle, tn—tentillum. Scale bar: 500 µm.

FIGURE 9 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 9. Different types (A–F) of Agalma clausi bracts. All drawings represent bracts of similar size i.e., 3.0 ± 0.5 cm in length except for type E bracts, which measured c. 1.3 cm in length.

FIGURE 7 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 7. Lower views of different sized nectophores of JSL I Dive 2919-DS1 specimen showing the Y-shaped nectosac. Scale bar: 2 mm.

FIGURE 15 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 15. Gonophores of Agalma clausi. A. Portion of stem showing arrangement of male gonophores; B. Developmental sequence of male gonophores with zooid axis; C. Mature female gonodendron showing gonophores at different stages of development being arranged along three axes; D. Growth sequence of female gonophores with zooid axis. brl—bracteal lamella, D—distal, mgon—male gonophores, P—proximal, pal—palpon, st—stem. Scale bars: A., B. 0.8 mm; C., D. 0.5 mm.

FIGURE 6 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 6. Morphology of Agalma clausi nectophoral bud in upper (left) and lower (right) views. aw—axial wing, lc—lower canal, llr—lower lateral ridge, lop—lateral ostial process, lrc—lateral radial canal, n—nectosac, o-ostium, orc—ostial ring canal, tb—thrust block, uc—upper canal, ulr—upper lateral ridge. Scale bar: 200 µm.

FIGURE 4 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 4. In situ photograph of specimen BWP 1048-7. Scale bar: 0.5 mm. (With grateful thanks to Ron Gilmer).

FIGURE 3. Agalma eschscholtzii Haeckel. A in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 3. Agalma eschscholtzii Haeckel. A. Whole colony; B. Nectophore; C. Bracts; D. Tentillum. From Haeckel (1888b), Plate XVIII, figs. 8, 9, 10, 11 & 14 respectively.

FIGURE 2. A in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 2. A. Whole colony of Agalma clausi from Bedot (1888) Plate III; B. Nectophore; C. Tentillum; D. Palpon, from Bedot (1888), Plate IV, figs. 6, 3, and 18, respectively.

FIGURE 5. A in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 5. A. Pneumatophore and nectosomal growth zone of specimen JSL I Dive 2929-DS1; B. Siphosomal stem from specimen BWP 1044-22. br—bract, cs—chitin septa, dbr—developing bract, f—funnel, gz—gastrozooid, ml—muscular lamella of nectophore, nb—nectophoral buds, pal—palpon, pc—pericystic cavity, pn—pneumatophore, pnd—pneumadenia, pns—pneumatosaccus, sh—siphosomal horn, st—stem, tc—tentacle. Scale bars: A. 2.5 mm; B. 1 mm.

FIGURE 1. A in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 1. A. Fewkes (1880), Plate II, figure 2. "Covering scale of Agalma Sarsii"; B. & C. Figures 13 and 25 from Bedot (1888) Plate IV. Proximal at bottom.

FIGURE 8 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 8. Nectophores of Agalma clausi drawn at different developmental stages, based on specimen JSL I Dive 2929-DSI. A. Young nectophore; B. Upper (left) and lower (right) views of medium-sized nectophore; C. Upper (left) and lower (right) views of largest nectophore. Scale bars: A. 2 mm; B. 2 mm; C. 5 mm.

FIGURE 14 in Agalma clausi (Bedot, 1888) (Siphonophora: Physonectae) - complementary description with notes on species distribution and ecology

FIGURE 14. Development of tentillum. A. Early stages; B. Later stages. gvc—gastrovascular canal, inv—involucrum, nc—nematocyst cluster, pa—primordial ampulla, rtf—rudiment of terminal filament Scale bars: A. 50 µm; B. 200 µm.