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A, Hypolobocera guayaquilensis (Bott), male (cb 54.8 × cl 33.7 mm). B, H. mindonensis Rodríguez & Von Sternberg, male (cb 18.8 × cl 12.3 mm). C, Lindacatalina latipenis (Pretzmann), (cb 41.7 × cl 26.7 mm). D, L. puyensis (Pretzmann), (cb 27.3 × cl 17.8 mm). (Preserved specimens)
Source publication
The freshwater crabs collected in 2015 from the provinces of Manabi and Pichincha located in the Pacific coastal region of Ecuador are identified as three species of the genus Hypolobocera of the family Pseudothelphusidae, H. aequatorialis (Ortmann, 1897), H. guayaquilensis (Bott, 1967) and H. mindonensis Rodoríguez & Von Sternberg, 1998, and those...
Contexts in source publication
Context 1
... aequatorialis (Ortmann, 1897) ( Potamocarcinus (Hypolobocera) aequatorialis aequatorialis, Bott (1967: 368, fig. ...
Context 2
... aequatorialis, Rodríguez (1982: 61, fig. 33e, f ). - Rodríguez & Von Sternberg (1998: 113, fig. 1A, B). -Takeda et al. Hypolobocera (Hypolobocera) [aequatorialis] aequatorialis aequatorialis, Pretzmann (1983d: 351, figs. 4, 18, 26, 39, 54, 56, 71 Fig. 1A) is elliptical most typically among the Ecuadorian congeners, with the posterolateral margin weakly concave posteriorly. The ...
Context 3
... mindonensis Rodríguez & Von Sternberg (1998: 121, fig. 7). Remarks. The carapace is elliptical in dorsal view, with convex lateral margins, giving the cylindrical appearance in dorsal view (Fig. 3B), but in the frontal view ( Fig. 5A) the dorsal surface is weakly convex dorsally only on the median part and seems to be flattened as a whole; the cervical groove is deep and wide proximally, becoming narrow and straight distally, and not reaching the lateral margin of the carapace; the anterolateral margin of the carapace is fringed ...
Context 4
... conradi latipenis, Pretzmann (1972: 135, figs. 190-193 Diagnosis. Carapace (Fig. 3C) transversely elliptical, with ca. 1.6 in ratio of breadth to length; dorsal surface smooth, microscopically granulated near frontal and anterolateral margins, flattened as a whole, with weakly raised gastric, cardiac and branchial regions; longitudinal linear, short groove from median notch of frontal margin divided into two short ...
Context 5
... (Fig. 3C) unequal, palm and both fingers inflated, with sharply toothed fingers; teeth of both fingers high, closely set, interlocked with each other; fingers similar to each other, subacute at tips, with median five teeth of immovable finger being much larger than others; smaller chela similar to larger chela, but slender, with triangular, ...
Context 6
... pleopod as mentioned above. As a result, our previous records of M. chacei and M. emarginatus should be corrected at present. It is otherwise noted here that one of the carapaces of M. emarginatus represented by Takeda et al. (2014: Fig. 6B) is seemingly identical with the line drawing of a young male of Z. emarginatus given by Rodríguez (1992: Fig. ...
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Citations
... La dispersión de hongos micorrícicos también puede ser resultado del tránsito de ciertos crustáceos adicionales a las cochinillas, tal como los cangrejos violinistas o también llamados cangrejos de río (Takeda et al. 2015). El movimiento de materiales vegetales de estos crustáceos a sus madrigueras (Booth et al. 2019) puede aportar en la dispersión de propágulos micorrícicos (Fig. 1). ...
Los animales son un factor importante en la dispersión de propágulos de los hongos formadores de micorrizas en los ecosistemas de bosque seco tropical. En la presente revisión bibliográfica, se hace énfasis en las diferentes formas de dispersión que pueden realizar los animales por medio de la ingesta o adherencia a estructuras externas para dispersar los propágulos de micorrizas tanto horizontal como verticalmente. La mayoría de las publicaciones provienen de estudios realizados en diversos ecosistemas (tundra, selva, sabanas y praderas), sin embargo, en esta revisión se puso especial énfasis en los estudios que reportan aquellos grupos de organismos que se encuentran en el ecosistema de bosque seco tropical. En el caso de los invertebrados, se evidencia el potencial de dispersión de los hongos micorrícicos en los diferentes estadios de desarrollo de los animales, así como por su movilidad en actividades realizadas para su alimentación y construcción de madrigueras. La dispersión efectiva de hongos micorrícicos se efectúa especialmente por medio de colémbolos, ácaros, lombrices de tierra, nemátodos, hormigas, isópodos, diplópodos, crustáceos, dípteros, avispas, escarabajos y saltamontes. La dispersión fúngica también puede verse favorecida por diferentes grupos de vertebrados, como los mamíferos, aves, reptiles y anfibios. Destacándose principalmente los roedores y las aves, quienes dispersan hongos micorrícicos a largas distancias por el consumo de propágulos adheridos a sus alimentos y estructuras externas. La literatura evidencia la importancia de la fauna en la dispersión de hongos micorrícicos en los ecosistemas de bosque seco. La presente revisión promueve la disminución de las brechas de conocimientos en torno a la dispersión de estructuras fúngicas, dinámicas especializadas y funcionamiento espacial del ecosistema.
Palabras clave: ecosistemas; esporas; fauna; hongos micorrícicos; región tropical
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To determine that Paragonimus sp. is actively transmitted in a tropical area of the Pacific region of Ecuador where human cases of pulmonary paragonimiasis have recently been documented, a total of 75 freshwater crabs were collected from 2 different streams in the Pedernales area of Manabí Province, Ecuador. All collected crabs were identified as Hypolobocera guayaquilensis based on morphological characteristics of the male gonopods. The hepatopancreas of each crab was examined by compressing it between 2 glass plates followed by observation under a stereomicroscope. Excysted Paragonimus metacercariae were detected in 39 (52.0%) crabs and their densities varied from 1 to 32 per infected crab. There was a positive relationship between crab size and metacercarial density. Sequences of the second internal transcribed spacer region of the ribosomal RNA gene of the Paragonimus metacercariae obtained in this study were identical to those of Paragonimus mexicanus deposited in the DDBJ/EMBL/GenBank database. Thus, the present study is the first to confirm that the crab species H. guayaquilensis is the second intermediate host of P. mexicanus in Manabí Province, Ecuador. Because this crab might be the possible source of human infections in this area, residents should pay attention to improper crab-eating habits related with a neglected parasitic disease, i.e., paragonimiasis.
