identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03BB87C010323929403EFAC8FEF5F9F6.text	03BB87C010323929403EFAC8FEF5F9F6.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Buea Cumberlidge & Mvogo Ndongo & Clark & Daniels 2019	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Buea gen. nov . </p>
            <p>(Figures 1 (a,b), 4(a), 5(a,b), 6(a,b), 7(a,d) and 8(a,d,g))</p>
            <p> Potamonemus – Cumberlidge 1993: 576 – 584, tables 2 – 3, figs 3 – 4, 5a – b, 6a – c (partim); Cumberlidge 1999: 15 – 16, 20, 24, 28, 50 – 51, 307, 309, 313, 355, 364, 374, 379 – 381, tables IX, X, XI, XII, XIII, fig. 40C, 41C, F, 42C, F, 43C, F, 44C, 53G, 61E, 65F (partim) </p>
            <p> Comparative material examined Cameroon.  Potamonemus mambilorum Cumberlidge and Clark, 1992 : Adamawa Region, holotype, adult ♂, CW 34.5, CL 25.5, CH 12.5, FW 11.5 mm, Somié, Bankim, Mayo-Banyo, Tikow Plain, 760 m asl, near border with Nigeria (6.50°N, 11.50°E), coll. D. Zeitlyn, 1991 (NHM reg. 1991: 183); several specimens, Elak-Oku, North-West region, coll. unknown, 20 October 2013.  Potamonemus sachsi Cumberlidge, 1993 : Bamenda, holotype, adult ♂, CW 33.1, CL 22.6, CH 10.6, FW 10.6 mm (ZIM K-30395). Paratypes, 3 ♂♂, CWs 32.8, 29.0, 26.0 mm, 4 ♀♀, CWs 34.4, 33.8, 33.4, 14.9 mm. </p>
            <p>Nigeria. Cross River State, adult ♂, CW 32, CL 22, CH 10.5, FW 9.5 mm, south-east of Nigeria, Obudu Plateau, Oshie Ridge, Sankwala Mountain range, 1 km north of Obudu Cattle Ranch (6.383209°N, 9.386741°E), coll. N. Cumberlidge, 8 April 1983 (NMU 8.IV.1983 A).</p>
            <p>Diagnosis</p>
            <p>Third maxilliped exopod either lacking, or with extremely reduced flagellum (Figure 8 (d)). Lower margin of cheliped merus with large pointed tooth distally (Figure 5 (a,b)). G1 TA long (TA/SS 0.86), directed outward, broad at base then narrowing sharply, distal one-third slender, tapering to pointed tip; lateral margin of G1 TA, SS with long bristles; longitudinal groove not visible when viewed from dorsal aspect (Figure 7 (a,d)); G1 SS basal margin very wide, 5× that of distal margin (Figure 7 (a,d)); G2 TA distinctly short (TA/SS 0.23) with pointed tip (Figure 8 (a)).</p>
            <p>Distribution</p>
            <p> Cameroon.  Buea gen. nov. is endemic to the rainforest zone of south-western Cameroon (Cumberlidge 1993, 1999). </p>
            <p>Type species</p>
            <p> Potamonemus asylos Cumberlidge, 1993 by present designation and by monotypy. </p>
            <p>Etymology</p>
            <p> The genus is named for the town of  Buea in south-western Cameroon which is close to the type locality. The name is used as a noun in apposition and the gender is masculine. </p>
            <p>Species included</p>
            <p> Buea asylos (Cumberlidge, 1993) comb. nov.</p>
            <p>Remarks</p>
            <p> This new potamonautine genus is established to accommodate  B. asylos comb. nov. which was previously considered to be a species of  Potamonemus . Work by Daniels et al. (2015, fig. 2) prompted more detailed comparative studies involving the types of all three species currently assigned to  Potamonemus . The morphological differences between the mandible and gonopod characters of  B. asylos comb. nov. and the other two species of  Potamonemus support the establishment of a new genus to accommodate  P. asylos Cumberlidge, 1993 . The new genus is compared to the holotype of  P. mambilorum from Cameroon (NHM reg. 1991: 183), the holotype of  P. sachsi , from Bamenda, Cameroon (CW 33.1 mm, ZIM K-30395), and other specimens of  P. sachsi (NMU 8.IV.1983 A) from Nigeria (Cumberlidge 1993). </p>
            <p> The main morphological differences that characterise  Buea gen. nov. and distinguish it from the two species of  Potamonemus are the following: the G1 TA of  Buea gen. nov. is elongate (TA/SS 0.86) and is longer than that of  Potamonemus (TA/SS 0.63); the first fourfifths of the G1 TA are straight and distinctly widened, with long bristle-like setae on the lateral margin (Figure 7 (a,d)) (vs slim along its entire length, and lacking bristle-like setae on the lateral margin in  Potamonemus , Figure 7 (b,c,e,f)); although short, the G2 TA of  Buea gen. nov. (TA/SS 0.23, Figure 8 (a)), is still longer than those of the two species of  Potamonemus (TA/SS 0.13, Figure 8 (b,c)); and the G2 TA of  Buea gen. nov. has a pointed tip (Figure 8 (a)) (vs G2 TA of the two species of  Potamonemus which has a blunt tip, Figure 8 (b,c)). </p>
            <p> Buea gen. nov. can be distinguished from the other genera of continental African potamonautines by differences in the carapace, G1, G2, third maxillipeds, and mandibles (Cumberlidge 1993, 1994, 1999) (Figures 1 – 3, 7 (a – f) and 8(a – i)). Each of these genera has been recovered as a well-supported lineage in the most recent molecular studies of this fauna (Daniels et al. 2006, fig. 1, 2015, fig. 2; Mvogo Ndongo et al. 2017c, fig. 1). Six of these genera are found in West and Central Africa (Sudanonautesı Liberonautesı Potamonautesı Potamonemusı  Louisea and  Erimetopus ), and four have representatives in Cameroon (Table 1) but only  Louisea is endemic to that country (Cumberlidge 1999; Mvogo Ndongo et al. 2017a, 2017c, 2018). </p>
            <p> Buea gen. nov. is superficially similar to  Louisea , a genus of small freshwater crabs found in south-western Cameroon that also has a third maxilliped exopod lacking a flagellum. These two genera can be distinguished, however, by the length of the G1 TA: that of  Buea gen. nov. is extremely long (TA/SS 0.86, Figure 7 (a,d) (vs significantly shorter (TA/SS 0.31) in  Louisea, Mvogo Ndongo et al. 2017a , fig. 3a,b; Mvogo Ndongo 2018, fig. 5a,b). In addition, the G1 TA of  Buea gen. nov. curves outward (Figure 7 (a,d)) (vs S-shaped in  Louisea, Mvogo Ndongo et al. 2017a , fig. 3a, b; Mvogo Ndongo 2018, fig. 5a,b), has a broadened mid-section that tapers to a pointed tip (Figure 7 (a,d)) (vs tube-like, ending in a blunt, rounded tip in  Louisea, Mvogo Ndongo et al. 2017a , fig. 3A,B; Mvogo Ndongo 2018, fig. 5a,b); the G1 TA of  Buea gen. nov. has long bristle-like setae on its lateral margin (Figure 7 (a,d)) (vs smooth, and lacking bristle-like setae in  Louisea, Mvogo Ndongo et al. 2017a , fig. 3A,B; Mvogo Ndongo 2018, fig. 5a,b); and the G2 TA is relatively short (TA/SS 0.23, Figure 8 (a)) (vs longer, TA/SS 0.64, in  Louisea (Mvogo Ndongo et al. 2017a, fig. 3C; Mvogo Ndongo 2018, fig. 5c). </p>
            <p> Buea gen. nov. is superficially similar to two species of  Sudanonautes (  S. orthostylis Bott, 1955 and  S. tiko Mvogo Ndongo, Schubart, von Rintelen, Tamesse, and Cumberlidge, 2017b ) from south-western Cameroon, but can be distinguished from these two species as follows. The anterolateral margin of the carapace of  Buea gen. nov. lacks a distinct intermediate tooth between the exorbital and epibranchial teeth (Figure 1 (a,b)) (vs a distinct intermediate tooth in  S. orthostylis and  S. tiko, Cumberlidge 1999 , fig. 31C), and the third maxilliped exopod lacks a flagellum (Figure 8 (d)) (vs an exopod with a long flagellum in  S. orthostylis and  S. tiko, Cumberlidge 1999 , fig. 34H; Mvogo Ndongo et al. 2017b, fig. 2d). In addition, both of these genera have a shortened G2 TA, whereas that of  Buea gen. nov. is distinctly longer (TA/SS 0.23, Figure 8 (a)) vs  S. orthostylis and  S. tiko (both with TA/SS 0.04) (Cumberlidge 1999, fig. 53V; Mvogo Ndongo et al. 2017b, fig. 3c). </p>
            <p> The absence of a flagellum on the exopod of the third maxilliped can be used to distinguish  Buea gen. nov. from Potamonautesı  Erimetopus and  Platythelphusa , and from most species of  Liberonautes (except for  L. grandbassa Cumberlidge, 1999 , and  L. lugbe, Cumberlidge 1999 ) because these taxa possess a long flagellum on the exopod (Cumberlidge 1999; Cumberlidge et al. 1999; Cumberlidge and Reed 2004; Marijnissen et al. 2004). In addition, the short G2 TA of  Buea gen. nov. (TA/SS 0.23; Figure 8 (a)) can be used to distinguish it from Potamonautesı Erimetopusı  Platythelphusa and  Liberonautes because all possess a G2 with a long flagellumlike TA (TA/SS 0.33 – 0.75, Cumberlidge 1999, 2017; Cumberlidge et al. 1999; Marijnissen et al. 2004). </p>
            <p> The updated freshwater crab species list for Cameroon now comprises 15 species in five genera assigned to the  Potamonautinae :  Louisea balssi (Bott, 1959) ,  L. edeaensis (Bott, 1969) ,  Potamonautes reidi Cumberlidge, 1999 ,  Potamonemus mambilorum Cumberlidge and Clark, 1992 ,  P. sachsi Cumberlidge, 1993 ,  Buea asylos (Cumberlidge, 1993) comb. nov. ,  Sudanonautes aubryi (H. Milne Edwards 1853) ,  S. africanus (A. Milne-Edwards 1869) ,  S. chavanesii (A. Milne- Edwards 1886),  S. faradjensis (Rathbun, 1921) ,  S. floweri (De Man, 1901) ,  S. granulatus (Balss, 1929) ,  S. monodi (Balss, 1929) ,  S. orthostylis Bott, 1955 , and  S. tiko Mvogo Ndongo et al. 2017b (Cumberlidge and Clark 1992; Cumberlidge 1993, 1994, 1999; Mvogo Ndongo et al. 2017a, 2017b, 2017c, 2018). </p>
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	https://treatment.plazi.org/id/03BB87C010323929403EFAC8FEF5F9F6	Public Domain	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.		Plazi	Cumberlidge, Neil;Mvogo Ndongo, Pierre A.;Clark, Paul F.;Daniels, Savel R.	Cumberlidge, Neil, Mvogo Ndongo, Pierre A., Clark, Paul F., Daniels, Savel R. (2019): A new genus for the freshwater crab Potamonemus asylos Cumberlidgeı 1993 ı (Brachyura: Potamoidea: Potamonautidae) from Cameroonı Central Africaı with a key to the genera of the Potamonautinae. Journal of Natural History 53 (11): 659-676, DOI: 10.1080/00222933.2019.1583390
03BB87C010313927438DF8AEFC39F930.text	03BB87C010313927438DF8AEFC39F930.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Buea asylos (Cumberlidge 1993) Cumberlidge & Mvogo Ndongo & Clark & Daniels 2019	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Buea asylos (Cumberlidge, 1993) comb. nov.</p>
            <p>(Figures 1 (a,b), 4(a), 5(a,b,g), 6(a,b), 7(a,d) and 8(a,d,g))</p>
            <p> Type species.  Potamonemus asylos Cumberlidge, 1993 , by present designation. </p>
            <p> Potamonemus asylos Cumberlidge, 1993: 576 – 584 , figs 3, 4, 5a – b, 6a – c, 8a – b; tables 2, 3; Cumberlidge 1999: figs 40C, 41C,F, 42C,F, 43C,F, 44C, 53G, 54 – 57, 61E, 65F, table IX; Ng et al. 2008: 171; Cumberlidge 2011a: 78, 80, 82, 86, table 6.1; Cumberlidge 2011b: 190; Mvogo Ndongo et al. 2017b: 3, table 1; Daniels et al. 2015, table 1. </p>
            <p>Material examined</p>
            <p>
                 Type material. Cameroon:  Buea asylos (Cumberlidge, 1993) comb. nov.  adult ♂ holotype, CW 27.6, CL 18.3, CH 9.0, FW 7.5 mm, between  Buea (4.153484°N, 9.299551°E) and   
                <a title="Search Plazi for locations around (long 9.441354/lat 4.638727)" href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=9.441354&amp;materialsCitation.latitude=4.638727">Kumba</a>
                 (4.638727°N, 9.441354°E), South-West Region, coll  . R.H.L.  Disney, 1969 (NHM 1994.587 donation from NMU 1969 /1991) .   Paratypes, 3 ♀♀, CWs 25.4, 23.7, 18.7 mm, 3 ♂♂, CWs 22.3, 20.1, 19.8 mm, between  Buea (4.153484°N, 9.299551°E) and   
                <a title="Search Plazi for locations around (long 9.441354/lat 4.638727)" href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=9.441354&amp;materialsCitation.latitude=4.638727">Kumba</a>
                 (4.638727°N, 9.441354°E), South-West Region, coll  . R.H.L.  Disney, 1969 (NHM 1994.588 – 591), DNA voucher specimens (Daniels et al. 2015, table 1) .   
                <a title="Search Plazi for locations around (long 9.299551/lat 4.153484)" href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=9.299551&amp;materialsCitation.latitude=4.153484">Adult</a>
                 ♂, CW 22.4, CL 15.8, CH 6.8, FW 6.9 mm,  Buea (4.153484°N, 9.299551°E) Kumba area, South-West Region, coll  . R. H.L.  Disney, 1969 (NMU TRW 1969.22), specimen photographed here . 
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                 Other material examined.   Adult ♀, CW 23.2, CL 17.2, CH 7.4, FW 7.4 mm,  Buea (4.153484°N, 9.299551°E),  
                <a title="Search Plazi for locations around (long 9.299551/lat 4.153484)" href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=9.299551&amp;materialsCitation.latitude=4.153484">Kumba area</a>
                 , South-West Region, coll  . R.H.L.  Disney, 29 April 1969 (NMU TRW 1969.13 a) .  Adult ♂, CW 19.8, CL 14.5, CH 6.8, FW 6.9 mm, 3 subadult ♂♂, CWs 16.4, 15.6, 14.9 mm, subadult ♀, CW 15.3 mm, 9 juv  ., Okia Stream,  Kumba area , South-West Region, coll  . R.H.L.  Disney, 9 May 1969 (NMU TRW 1969.27) . Adult ♂, CW 19.0 mm, 3 subadult ♂♂, CWs 18.4, 15.8, 12.6 mm, subadult ♀, CW 17.9 mm, 2 juv  . , Okia Stream,  Kumba area , South-West Region, coll. R.H.L.  Disney, 27 March 1969 (NMU TRW 1969.29) .   Limbé (formerly Victoria),  South-West Region , 2 ♂♂, CWs 21.3, 20.1 mm, coll  . E . Fickenday, 6 November 1912, ‘ edible land crabs ’ (ZIM K-3607) . 
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            <p>Diagnosis</p>
            <p>Exorbital tooth absent where anterolateral margin meets lateral orbital margin (Figures 1 (a,b) and 4(a)); major cheliped dactylus broad, flattened, not arched (Figures 1 (b) and 5(a,b)); lower margin of cheliped merus with four large jagged pointed teeth (Figures 1 (b) and 6(a,b)); anterior corners of carapace surface smooth; carapace grooves shallow to absent (Figures 1 (a) and 4(a); Cumberlidge 1993, figs. 2a, 3a).</p>
            <p>Description</p>
            <p> Same as for the genus and for  P. asylos comb. nov. (see Cumberlidge 1993, 1999). </p>
            <p>Distribution</p>
            <p> Buea asylos comb. nov. is endemic to the rainforest zone of south-western Cameroon between the towns of Kumba,  Buea and Limbé (Cumberlidge 1993, 1999). </p>
            <p>Type locality</p>
            <p> Between  Buea and Kumba, south-western Cameroon. </p>
            <p>Ecology</p>
            <p> Buea asylos comb. nov. is restricted to the humid lowland and montane rainforests of south-western Cameroon in the area near Mount Cameroon (4095 m asl) that has an annual average rainfall of more than 5000 mm (Mvogo Ndongo et al. 2017a, 2017b). </p>
            <p>Remarks</p>
            <p> Significant morphological differences between  B. asylos comb. nov. ,  P. mambilorum and  P. sachsi were found in the G1, G2 and mandible (Figures 7 (a – f) and 8(a – c,g – i)) that are used here to define  Buea gen. nov. Other noteworthy characters of  B. asylos comb. nov. include those of the chelipeds and carapace of that set it apart from the two species of  Potamonemus : the cheliped merus lower medial margin has large jagged teeth (Figure 6 (a,b)) (vs small granules in  Potamonemus , Figure 6 (c,f)), the cheliped carpus medial margin of  B. asylos comb. nov. has a small but distinct pointed proximal tooth (Figure 5 (g)) (vs a small granule-sized tooth in  Potamonemus , Figure 5 (h,i)), the cheliped dactylus is distinctly broadened (Figures 1 (b) and 5 (a)) (vs distinctly slim or arched in  Potamonemus , Figure 5 (c,e)), and the carapace proportions of  B. asylos comb. nov. are wider (CW/FW 3.35, vs 3.08 – 3.12), longer (CW/FW 2.32, vs 2.22 – 2.25), and higher (CW/FW 1.10, vs 0.96 – 1.07) than in  Potamonemus . </p>
            <p>Conservation status</p>
            <p> The extinction risk status of  B. asylos comb. nov. was assessed in 2008 using the International Union for the Conservation of Nature (IUCN) Red List protocols (Cumberlidge 2008a) as Data Deficient (DD) in view of the lack of information on its extent of occurrence (EOO), ecological requirements, population size, population trends and long-term threats (Cumberlidge 1993, 2011a, 2011b; Cumberlidge et al. 2009; IUCN 2012). The three locations available in this study give a recalculated EOO of 142 km 2, and an area of occupancy (AOO) of 12 km 2, using GeoCAT (http://geocat.kew.org; Bachman et al. 2011), but these are still probably underestimates given the paucity of the locality data (but if taken alone would point to a Red List threatened category). The extinction risk status of  P. mambilorum (seven locations, EOO 43,291 km 2; Cumberlidge 2008b) and  P. sachsi (four locations, EOO 24,219 km 2; Cumberlidge 2008c) were assessed in 2008 (Cumberlidge 2008b, 2008c) as Least Concern (LC) and Vulnerable (VU), respectively, (Cumberlidge 1993, 2011a, 2011b; Cumberlidge et al. 2009; IUCN 2012). Although the recalculations of the EOO and the AOO for these three species do not in themselves warrant a reassessment of their extinction risk, there is reason to believe that the threat status of these species may have intensified since the last assessment. For example, recent field work in the wetland ecosystems of the South-West and Littoral regions of Cameroon by the second author indicates that these habitats are being impacted by deforestation and by intensive agricultural practices that are severely altering the flow patterns of small streams and impacting the aquatic biodiversity (Mvogo Ndongo et al. 2017a, 2017b, 2017c, 2018). Awareness of these current threats to the habitats of  B. asylos comb. nov. ,  P. mambilorum and  P. sachsi means that each of these taxa is likely to be reassigned to a more threatened category once new IUCN Red List extinction risk assessments have been carried out. There is a need for further field research specifically aimed at gathering the data needed for an extinction risk assessment of these littleknown endemic species from this understudied biodiversity hotspot. </p>
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	https://treatment.plazi.org/id/03BB87C010313927438DF8AEFC39F930	Public Domain	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.		Plazi	Cumberlidge, Neil;Mvogo Ndongo, Pierre A.;Clark, Paul F.;Daniels, Savel R.	Cumberlidge, Neil, Mvogo Ndongo, Pierre A., Clark, Paul F., Daniels, Savel R. (2019): A new genus for the freshwater crab Potamonemus asylos Cumberlidgeı 1993 ı (Brachyura: Potamoidea: Potamonautidae) from Cameroonı Central Africaı with a key to the genera of the Potamonautinae. Journal of Natural History 53 (11): 659-676, DOI: 10.1080/00222933.2019.1583390
03BB87C0103F393F438EFCC7FB0CFD7A.text	03BB87C0103F393F438EFCC7FB0CFD7A.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Potamonemus Cumberlidge and Clark 1992	<html xmlns:mods="http://www.loc.gov/mods/v3">
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            <p> Potamonemus Cumberlidge and Clark, 1992</p>
            <p>(Figures 2 (a,b), 3(a,b), 4(b,c), 5(c – f), (h,i), 6(c – f), 7(b,c,e,f) and 8(b,c,e,f,h,i))</p>
            <p> Potamonemus Cumberlidge and Clark, 1992: 49 , figs 1 – 3, tables 1 – 2, pl. 1; Cumberlidge, 1999: 208 – 209, fig. 64D </p>
            <p>Rediagnosis</p>
            <p>Mandibular palp 2-segmented, lacking flap at junction between segments (Figure 8 (h,i)); G1 TA slim, curving outward, long (TA/SS 0.63), lacking setae, tapering to pointed tip (Figure 7 (b,c,e,f)); G2 TA distinctly shortened (TA/SS 0.13, Figure 8 (b,c)).</p>
            <p>Description</p>
            <p> See Cumberlidge and Clark (1992) and Cumberlidge (1999). The carapace proportions of all known specimens of  P. mambilorum have been recalculated in the present study (CW/FW 3.08, CW/FW 2.22, and CW/FW 0.96), and the relative lengths of the TAs of G1 and G2 of  P. mambilorum (TA/SS of 0.63 and 0.13 respectively) are presented here for the first time. </p>
            <p>Type species</p>
            <p> Potamonemus mambilorum Cumberlidge and Clark, 1992 , by original designation. </p>
            <p>Type locality</p>
            <p>Somié, Cameroon.</p>
            <p>Species included</p>
            <p> Potamonemus mambilorum and  P. sachsi Cumberlidge, 1993 . </p>
            <p>Distribution</p>
            <p> Potamonemus is endemic to the rainforest zone of south-western Cameroon and southeastern Nigeria (Cumberlidge 1993, 1999). </p>
            <p>Remarks</p>
            <p> The carapace proportions of all known specimens of  P. sachsi have been recalculated in the present study (see above), as have the relative lengths of the terminal articles of G1 and G2 of  P. sachsi , and these characters can be used to distinguish the two species of  Potamonemus from  B. asylos comb. nov.</p>
            <p>Biogeography</p>
            <p> The freshwater crab fauna of Cameroon is dominated by species of  Sudanonautes , and is most diverse in south-west Cameroon where there are two endemic genera (  Louisea and  Buea gen. nov. ), two species of  Potamonemus , and a single species of  Potamonautes (N. Cumberlidge unpub. data). Biogeographically, the affinities of the freshwater crabs of Cameroon lie with those of its neighbouring countries (Nigeria, Central African Republic, Congo, Gabon, and Equatorial Guinea /Bioko) which occupy a forested part of Africa to the north of the Congo River that is bounded by the north-west coastline of Central Africa. The freshwater crab fauna of this part of Africa is dominated by species of  Sudanonautes and is remarkable for the almost complete absence of species  Potamonautes (Cumberlidge 1999) , which is the most species-rich and most widely distributed genus in sub-Saharan Africa (N. Cumberlidge, unpub. data). The freshwater crab fauna of Cameroon is unusually diverse (15 species in five genera), especially given the relatively small size of this Central African country (475,440 km 2). This species richness may be attributed to the abundance of stable lowland and highland equatorial forests and the numerous year-round water courses that are sustained over historical time by the high rainfall totals recorded for this part of Africa (Cumberlidge 1999; Mvogo Ndongo et al. 2017a; 2017b, 2017c, 2018) (Table 1). The present study underlines the importance of Cameroon as a biodiversity hotspot because it has the highest number of freshwater crab genera in the whole of the African continent (Cumberlidge 1999; Daniels et al. 2015; Mvogo Ndongo et al. 2017a, 2017b, 2017c, 2018), and only Madagascar (with seven genera) is more diverse in the Afrotropical region as a whole (Cumberlidge and Sternberg 2002; Cumberlidge et al. 2017). </p>
            <p> Amended key to the genera of the African  Potamonautinae</p>
            <p> 1 The recognition of the new genus and the re-diagnosis of the reorganised  Potamonemus make it necessary to provide an amended key to the genera of the African  Potamonautinae . </p>
            <p> 1a Carapace frontal margin lined by small teeth or distinct granules; external angles of front marked by either sharp forward-pointing spine or small granule; triangular downward-pointing tooth beneath each external angle … ............ ...........  Platythelphusa</p>
            <p>1b Carapace frontal margin smooth, external angles of front smooth (lacking spine, granule, or downward-pointing tooth) ................................................................................ 2</p>
            <p> 2a Carapace outline subhexagonal; outer margin of cheliped carpus with 2 or 3 sharp teeth; carpi and propodi of p2 – p5 with marginal spines................................  Erimetopus</p>
            <p> 2b Carapace outline transversely oval; outer margin of carpus of cheliped smooth, lacking teeth; carpi and propodi of p2 – p5 smooth, lacking marginal spines .... 3 3a G1 TA curving inwards towards medial line................................................  Liberonautes 3b G1 TA either straight or curving outwards away from medial line......................... 4 </p>
            <p>4a Third maxilliped exopod with long flagellum ................................................................... 5 4b Third maxilliped exopod lacking flagellum ........................................................................ 6</p>
            <p> 5a Intermediate tooth on anterolateral margin between exorbital and epibranchial teeth ..........................................................................................................................  Sudanonautes</p>
            <p> 5b No intermediate tooth on anterolateral margin between exorbital and epibran- chial teeth................................................................................................................  Potamonautes</p>
            <p>6a G1 TA long (TA/SS 0.63 – 0.86), curving outwards, ending in pointed tip; G2 TA much shorter (TA/SS 0.13 – 0.23) ............................................................................................. 7</p>
            <p> 6b G1 TA weakly S-shaped, tube-like, ending in rounded tip; G2 TA very long, flagellum- like (TA/SS 0.64)..........................................................................................................................  Louisea</p>
            <p> 7a G1 TA long (TA/SS 0.86), broadened in mid-section, with long marginal setae......... ...........................................................................................................................................  Buea gen. nov.</p>
            <p> 7b G1 TA short (TA/SS 0.63), slim along entire length, lacking long marginal setae..... .............................................................................................................................................  Potamonemus</p>
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	https://treatment.plazi.org/id/03BB87C0103F393F438EFCC7FB0CFD7A	Public Domain	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.		Plazi	Cumberlidge, Neil;Mvogo Ndongo, Pierre A.;Clark, Paul F.;Daniels, Savel R.	Cumberlidge, Neil, Mvogo Ndongo, Pierre A., Clark, Paul F., Daniels, Savel R. (2019): A new genus for the freshwater crab Potamonemus asylos Cumberlidgeı 1993 ı (Brachyura: Potamoidea: Potamonautidae) from Cameroonı Central Africaı with a key to the genera of the Potamonautinae. Journal of Natural History 53 (11): 659-676, DOI: 10.1080/00222933.2019.1583390
