Kingsleya attenboroughi
K. gustavoi Magalhães, 2005
Kingsleya attenboroughi
K. gustavoi
K. gustavoi
K. gustavoi
Kingsleya attenboroughi
K. gustavoi
K. gustavoi
K. gustavoi
K. gustavoi
A new and endangered species of Kingsleya Ortmann, 1897 (Crustacea: Decapoda: Brachyura: Pseudothelphusidae) from Ceará, northeastern Brazil
Pinheiro, Allysson P.
Santana, William
Zootaxa
2016
4171
2
365
372
844C2
[151,448,712,738]
Malacostraca
Pseudothelphusidae
Kingsleya
Animalia
Decapoda
1
366
Arthropoda
species
attenboroughi
sp. nov.
Holotype: male, cw 46mm, cl 29.2mm, Brazil, Cearástate, Barbalha, Arajara district, 07°20’07.6”S, 39°23’58.8”W, 17.iv.2016( MZUSP34626). Paratypes( 7 specimens): Brazil, Cearástate, Barbalha, Arajara district, Córrego do Arajara, 04.v.2016, 1 male cw 51.2mm, cl 31mm(MZUSP 34627); 1 female cw 41.5mm, cl 26.7mm(MZUSP 34628); 1 male cw 40mm, cl 26.1mm, 1 female cw 35mm, cl 23mm(INPA 2208); 2 males cw 36.8mm, cl 24mmand cw 36mm, cl 24mm, 1 female cw 37.7mm, cl 24mm(LACRUSE 0221). Comparativematerial. Fredius reflexifrons(Ortmann, 1897): Brazil, Amapá, Município de Laranjal, 16.i.2012, 1 male( INPA2125). Pará, Rio do Peixe Boi, 01°11’30”S, 47°18’54”W, 03.iii.1995, E. Matos& A. Henriques Jrcoll., 1 male( INPA851). Amazonas, Manaus, Reserva do Km41, 02°26’56”S, 59°46’13”W, 1 male( INPA889). Ceará, Viçosa do Ceará, Fonte do Caranguejo, 03º33’43.2”S, 41º5’09.6”W, 24.vi.2004, M. Pereiracoll., 1 male( INPA1382). Kingsleya castrensis Pedraza, Martinelli-Filho & Magalhães, 2015: Brazil, Pará, Caverna Pedra da Cachoeira, 03°19’14.8”S, 52°19’53.1”W, R. Pinto-da-Rocha coll., 20.vi.2012, male paratypecw 50.9mm, cl 30mm( MZUSP26394). Brazil, Pará, Altamira, 03°19’14.8”S, 52°19’53.1”W, R. Pinto-da-Rocha coll., 24.iii.2012, male paratypecw 32.7mm( MZUSP25943). Kingsleya gustavoi Magalhães, 2005: Brazil, Pará, Rio Itacaiúnas, Projeto Carajás, 17.vii.1988, 2 male paratypescw 37mm, cl 23.3mmand cw 19.5mm, cl 12.2mm( MZUSP9699). Pará, Canaã dos Carajás, Gruta NV06, Andrade& Amonicoll., 22–28.v.2005, C. Magalhãesdet., 2 males( MZUSP16702). Kingsleya junki Magalhães, 2003: Brazil, Pará, Rio Xingú, Vitória do Xingú, 02°53’S, 52°01’W, R. Santos, C. Maciel & J.O. Dias coll., 03.xii.2000, male holotypecw 33mm, cl 20.8mm( MPEG777). Kingsleya latifrons(Randall, 1840): Suriname, Anapaika Village, Rio Lawa, B. Malkin coll., 26.xi.1963, C. Magalhães det., 2 males, 2 females (MZUSP 1887). Brazil, Pará, Rio Trombetas, Cachoeira Porteira, V. P.Daniel et al. coll., 10.iv.1985, C. Magalhãesdet., 1 male, 1 female( MZUSP7008). Brazil, Amazonia, Imbó, Rio Uatumã, Cachoeira Morena, F.Efrem et al. coll., 07.x.1987, 4 males( MZUSP11673). Kingsleya ytuporaMagalhães, 1986: Brazil, Pará, Rio Trombetas, Cachoeira Porteira, C.Magalhães et al. coll., 2–10.x.1985, 1 male paratypecw 48mm, cl 28.5mm, 2 female paratypes, cw 64.5mm, cl 38mmand cw 55.6mm, cl 33mm( MZUSP7009).
Description.Carapace ellipsoid, much wider than long, widest medially, dorsally smooth, slightly convex anteriorly, regions poorly defined. Two distinct gastric pits on metagastric region. Cervical grooves deep, narrow, slightly divergent anteriorly, fading proximally, distal end almost reaching anterolateral margin. Intestinal, cardiac regions indistinct. Postfrontal lobules inconspicuous; median groove indistinct. Carapace between front, postfrontal lobules smooth, weakly concave. Front upper border smooth, angulate, slightly bilobed in dorsal view, median notch faint; lower border carinated, slightly sinuous in frontal view, not visible in dorsal view. Superior orbital margin smooth, lower orbital margin crenualted; exorbital angle low, somewhat acute; orbital cavity with several thick setae near exorbital angle. Inner orbital tooth well developed, broadly triangular, partially occluding orbital cavity. Anterolateral margin of carapace with very distinct depression just behind exorbital angle, followed by a set of minute teeth increasing in size from the anterior to posterior portion; posterolateral margin smooth, barely defined. Epistome narrow, deeply grooved transversally, upper margin straight, lower margin forming a mesial triangular tooth, deflexed, crenulated. Subhepatic region smooth; pterystogomial region with scarce pubescence bordering bucal frame. Endopod of maxilliped III with outer margin of ischium almost straight, subretangular, slightly wider than merus; mesial margin setose, crista dentata with small, subquadrate, corneous teeth. Merus shorter than ischium, wider as long, inner margin almost straight, with a small proximal lobe covered with several long setae; outer margin curved distally. Inner surface of palp covered with very few, small setae; outer margin of propodus, dactylus densely covered with long setae, carpus with few long setae. Third maxilliped exopod vestigial, about one fifth of ischium lateral margin length. Aperture of efferent branchial channel wide, subquadrate, lacking setae. FIGURE 1.A, B. Male paratype of Kingsleya gustavoiMagalhães, 2005(MZUSP 9699): A, habitus, dorsal view; B, cephalothorax, ventral view. C–F. Male holotype of Kingsleya attenboroughi n. sp.(MZUSP 34626): C, habitus, dorsal view; D, cephalothorax, ventral view; E, cephalothorax, frontal view; F, lateral view of the left cheliped. Scale bars A–F 2 0mm. FIGURE 2.A, B. Female paratype of Kingsleya attenboroughi n. sp.(MZUSP 34628): A, habitus, dorsal view; B, cephalothorax, ventral view. Scale bar 20 mm. Chelipeds heterochelous in both males, females, more pronounced in males, similarly armed, right P1 usually largest ( holotypeleft cheliped largest). Merus subtriangular in cross section; upper, mesial margins distinctly crenulated; inferior lateral margin with row of distinct small tubercles, not reaching the proximal, distal margins; distal margin arched, smooth laterally, crenulated mesially. Carpus with inner margin indented proximally, with prominent median spine, smooth distally; outer margin rounded, smooth. Propodus massive, upper, mesial, lateral, ventral surfaces smooth. Movable, fixed fingers with lateral, mesial, dorsal surfaces with punctations arranged in longitudinal subparallel lines; movable finger distinctly curved downwards. Fingers noticeable gaping, tips crossing distally; cutting edges of fingers with small, massive teeth. P2–5 slender, similar in shape, decreasing in size very slightly from P2 to P5. P2–5 meri upper margin with sparse row of minute spines; dactyli punctuate in all surfaces, with five longitudinal rows of sharp spines, 3 dorsal, 2 ventral; increasing in size distally. Thoracic sternum longer than broad. Sternal sutures 4/5 to 7/8 very distinct, ending just before reaching median line of thoracic sternum. Episternites 4–6 subtriangular, episternite 7 shorter, truncated in males, rounded in females. Episternites 4–7 fringed with short setae, longer in females. Sterno-abdominal cavity deeply excavated, shallower in females; sternites 5 to 8 densely covered medially with distinct long setae, sternite 4 with few long setae in males, females with sparse setae mostly on sternites 1–4; tubercle of abdominal holding system reduced in males, almost imperceptible in females, placed near sternal suture 5/ 6 inmales,. Male, female abdomen with 6 free somites. Male abdomen tapering distally from third to sixth somite; telson triangular; margins, including telson, densely setose, setae short. Female abdomen rounded, sixth somite longer, wider, telson broadly triangular. Penis distinctly long, larger proximally, tapering distally, emerging near coxosternal condyle articulation. G1 almost straight, broadened distally, with very shallow curvature on abdominal surface in mesial view, with well-developed mesial process. Marginal suture almost straight, displaced to mesial side distally, with several long setae proximally. Lateral suture deep, approximately 2/3 of gonopod length from proximal portion. Marginal process short, broad, subquadrate in mesial view, not projecting distally beyond field of apical spines, distal notch in latero-abdominal surface. Mesial process short, subtriangular, proximal portion straight, distal portion protruded into sharp conical spine curved in anteromesial direction, mesial process separated by a deep incision from apical plate. Apical plate with two large, subtriangular lobes, separated from each other by distinct groove in mesial, sternal views, proximal lobe with conspicuous semicircular protuberance in mesial, sternal views. Sperm channel opening near the base of apical plate in sternal view. Apical spine field well developed, curved proximally, with a patch of minute spines concentrated medially, longitudinally directed along caudal side of apical plate, delimited by mesial, lateral borders of distal lobe of apical plate, distally closed. G2 slightly sinuous, almost as long as G1, distinctly slender, distal 3/4 tapered; tip flattened, with numerous short spinules on sternal surface.
Typelocality and distribution. Known so far only from the typelocality in Arajara district, Barbalha Municipality, Cearástate, Brazil, 07°20’07.6”S, 39°23’58.8”W. Ecological notes. The specimens were collected at the Córrego do Arajara, a small stream in the peri-urban region of the Arajara district. The stream has deforested margins surrounded by farms and corrals and is located in a slope area of pluvio-nebular forest, evergreen, about 750 mabove sea level, with representatives from the Atlantic and Amazonian forests ( Sales et al.1998). The stream was shallower than 1 mand 4 to 5 mwide, perennial, and with medium energy, with bottoms of consolidated sandstone blocks and clear water ( Fig. 5A). The specimens were found between rocks and in small crevices of about 20 to 50 cmdeep ( Fig. 5B). Burrows were not found on the margins or in the riverbed. Crabs were more active at night and were probably hiding and inactive during the day.
Etymology. This new species is named in honor of the English naturalist Sir David Attenborough, a devoted naturalist and communicator of science that promotes environmental education and protection, including in the Chapada do Araripe, from where this species appears to be endemic.
Remarks. Kingsleya attenboroughi n. sp.can be clearly included in Kingsleyadue to several characters of the G1. The apical plate of the G1 is bilobed with lobes partially overlapping; the marginal process distally enlarged, not surpassing the apical field of spines; the mesial process distinctly separated from the apical plate and standing out from the cephalic surface of the stem; and the field of apical spines distally divided by a terminal notch ( Fig. 4A–D) ( Magalhães & Türkay 2008; Pedraza & Tavares 2015).
Kingsleya attenboroughi n. sp.closely resembles K. gustavoi Magalhães, 2005, until now the easternmostly distributed species of the genus. Both species have a gonopod with a subtriangular apical plate with two lobes, with distal lobe larger, a mesial processes ending distally in strong spine, a well-developed field of apical spines, and a mesial process clearly separated by a deep incision from the apical plate ( Figs. 3A–H). Kingsleya attenboroughi n. sp.nevertheless differs from K. gustavoiand other congeners in having: 1) a short apical plate, with anteriorly directed lobes and angulated proximally (apical plate longer and with anterolaterally directed lobes and enlarged proximally, forming a distinct rounded prominence in K. gustavoi; Figs. 3B, F, 4A, D); 2) proximal lobe of the apical plate with conspicuous semicircular protuberance in mesial and sternal views (proximal lobe of the apical plate partially folded over the mesial crest of the field of apical spines in K. gustavoi; Figs. 3A, D, G, E, H, 4A, C); 3) marginal process protruded, projecting mesially in sternal view, subquadrate in mesial view (mesial process prominent, but not projecting mesially in sternal view, subtriangular in mesial view; Figs. 3A, E, 4C); 4) field of apical spines narrow, tapering distally, with small spines concentrated proximally (field of apical spines more opened, with small spines evenly distributed along the field; Figs. 3D, H, 4B). Apart from the differences in the G1, Kingsleya attenboroughi n. sp.can also be differentiated from K. gustavoiby a set of small differences observed in the paratypes(MZUSP 9699): 1) the front lower border not visible in dorsal view (front lower border projected anteriorly and visible in dorsal view in K. gustavoi); 2) anterolateral margin of the carapace straight just after the exorbital angle in frontal view (anterolateral margin of the carapace slightly sinuous just after the exorbital angle in frontal view in K. gustavoi); 3) anterolateral margin of the carapace with a set of minute teeth increasing in size from the anterior to posterior portion (anterolateral margin of the carapace with a set of minute teeth of equal size in K. gustavoi).
The discovery of the new species is evidence of our lack of knowledge on this important group and emphasizes the need of conserving these unique environments and their fauna. These remnants of humid forests isolated in the Caatinga biome, which is characterized by desert-like vegetation and is exclulsive to northeastern Brazil, have been suffering under anthropogenic pressures mainly related to land development and the use of water resources, factors that restrict the habitat of the new species to small portions near the source of streams. The new species is already at significant risk of extinction, taking as base the IUCN criteria B2b, which qualifies the species as endangered (EN) (IUCN, 2012).
1315932695
2016-04-17
MZUSP
Brazil
-7.3354445
Arajara district
1
-39.39967
Barbalha
1
366
MZUSP 34626
1
Ceara
holotype
1315932701
2016-05-04
Brazil
Barbalha
Corrego do Arajara
Arajara district
1
366
7
Ceara
paratype
1315932690
2012-01-16
INPA
Municipio de Laranjal
Brazil
Municipio de Laranjal
Comparative
1
366
INPA 2125
1
1
Amapa
1315932691
1995-03-03
INPA
E. Matos & A. Henriques Jr
Brazil
-1.1916667
Rio do Peixe Boi
21
-47.315
1
366
INPA 851
1
1
Para
1315932703
INPA
Brazil
-2.448889
Reserva do Km
21
-59.77028
Manaus
1
366
INPA 889
1
1
Amazonas
1315932696
2004-06-24
INPA
M. Pereira
Brazil
-3.562
Fonte do Caranguejo
1
-41.086
1
366
INPA 1382
1
1
Ceara
1315932699
2012-06-20
MZUSP
Caverna Pedra da Cachoeira
Brazil
-3.3207777
Caverna Pedra da Cachoeira
1
-52.331417
1
366
MZUSP 26394
1
Para
paratype
1315932694
2012-03-24
MZUSP
Brazil
-3.3207777
Altamira
1
-52.331417
1
366
MZUSP 25943
1
Para
paratype
1315932698
1988-07-17
MZUSP
Brazil
Projeto Carajas
Rio Itacaiunas
1
366
MZUSP 9699
2
2
Para
paratype
1315932692
2005-05-22
2005-05-28
2005-05-22
MZUSP
Canaa dos Carajas & Gruta NV & Andrade & Amoni
Brazil
C. Magalhaes
Para
1
366
MZUSP 16702
2
2
Para
paratype
1315932700
2000-12-03
MPEG
Brazil
-2.8833332
Vitoria do Xingu
1307
-52.016666
Rio Xingu
1
366
MPEG 777
1
Para
holotype
1315932702
1985-04-10
MZUSP
Cachoeira Porteira, V. P.
Brazil
C. Magalhaes
Rio Trombetas
1
366
MZUSP 7008
2
1
1
Para
holotype
1315932693
1987-10-07
MZUSP
Cachoeira Morena, F.
Brazil
Amazonia
Rio Uatuma
Imbo
1
366
MZUSP 11673
4
4
holotype
1315932697
1985-10-02
1985-10-10
1985-10-02
MZUSP
Cachoeira Porteira, C.
Brazil
Rio Trombetas
1
366
MZUSP 7009
3
2
1
Para
paratype