Topic
Echiothrix
About: Echiothrix is a research topic. Over the lifetime, 5 publications have been published within this topic receiving 75 citations.
Papers
TL;DR: The present report documents morphological and distributional limits of species in Echiothrix, places one of those species in an ecological and parasitological landscape and analyses of morphometric traits derived primarily from cranial and dental measurements document the presence of two species.
Abstract: Among the 15 known genera of murine rodents endemic to the island of Sulawesi, is the shrew rat genus Echiothrix. Physically large (length of head and body = 182–235 mm; weight = 215–310 g) with a bicolored tail typically longer than head and body (100%–135% of head and body length), elongate hind feet (48–55 mm), large ears (31–35 mm), long and thin muzzle, spinous fur, and tiny molars relative to size of skull (length of molar row = 12%–13% of occipitonasal length), Echiothrix was named and described in 1867 and through the years has been treated as monotypic or containing up to three species. Results from analyses of morphometric traits derived primarily from cranial and dental measurements document the presence of two species. Echiothrix leucura (Gray, 1867) is restricted to the northern peninsular mainland east of the Gorontalo region (00°31′ N, 123° 03′ E). This distribution is concordant with that of four other murids endemic to the northeastern tip of the northern peninsula: Bunomys...
80 citations
TL;DR: The rostral configuration of Sommeromys is unlike the architecture found in any other of the more than 1300 species in the entire Muridae, and has a derived cephalic arterial circulation, a pattern otherwise found only in Crunomys celebensis among Sulawesian murines.
Abstract: The murine rodent, Sommeromys macrorhinos, new genus and species, is described from a single specimen collected at 2400 m near the summit of Gunung Tokala in central Sulawesi. The species is insectivorous and a member of the tropical upper montane rain forest fauna of the island. With its small body, elongate rostrum, long and slender hind feet, very long tail, and brownish gray fur, S. macrorhinos superficially resembles the long-tailed and small-bodied shrew rat, Tateomys macrocercus, another Sulawesian upper montane forest endemic. Sommeromys macrorhinos, however, possesses a combination of derived external, cranial, and dental traits, along with a unique rostral shape, that dissassociates it from any relationship with not only T. macrocercus and its close allies T. rhinogradoides and Melasmothrix naso, but with also the large-bodied shrew rats of Sulawesi (Echiothrix) and those indigenous to the Philippines (Archboldomys, Rhyncomys, Chrotomys, and Celaenomys) and New Guinea (Neohydromys, Pseu...
48 citations
TL;DR: Musserakis sulawesiensis is described from the large-bodied shrew rat, Echiothrix centrosa, one of the old endemic rats of Sulawesi, Indonesia, and readily distinguished from other heterakid genera by having non-recurrent and non-anastomosing cephalic cordons and lacking teeth in the pharyngeal portion.
Abstract: Musserakis sulawesiensis gen. et sp. n. (Nematoda: Heterakidae) is described from the large-bodied shrew rat, Echiothrix centrosa, one of the old endemic rats of Sulawesi, Indonesia. Musserakis is readily distinguished from other heterakid genera by having non-recurrent and non-anastomosing cephalic cordons, by lacking papillae between papillae groups around precloacal sucker and cloacal aperture and by lacking teeth in the pharyngeal portion. The spicules are equal but with marked dimorphism among individuals. Heterakids collected from other old endemic murids examined, i.e., Crunomys celebensis, Tateomys macrocercus and Tateomys rhinogradoides, and the new endemic rats of Sulawesi, were Heterakis spumosa Schneider, 1866, a cosmopolitan nematode of various murids. It is suggested that M. sulawesiensis is specific to Echiothrix.
23 citations
25 Jul 2014
2 citations
TL;DR: Two new species of the genus Trichuris parasitic in the old endemic murids of Indonesia are described, characterized by having a gradually tapered and sharply pointed distal end of the spicule, being readily distinguished from most of the congeners known from murid rodents.
Abstract: Two new species of the genus Trichuris (Nematoda: Trichuridae) parasitic in the old endemic murids of Indonesia are described: T. musseri sp. nov. from Echiothrix centrosa (Murinae: Rattini) in Sulawesi and T. mallomyos sp. nov. from Mallomys rothschildi (Murinae: Hydromyini) in Papua Indonesia. Both species are characterized by having a gradually tapered and sharply pointed distal end of the spicule, being readily distinguished from most of the congeners known from murid rodents. Trichuris musseri is readily distinguished from T. mallomyos by having a much smaller body and large number of nuclei per subdivision of stichosome. The resemblance in spicule morphology between the two new species is of special interest because both hosts belong to different tribes and have different habitats and habits. It remains to be elucidated whether the resemblance is merely homoplasy or actually reflects close phylogenetic relationship of the parasites.
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2017 | 1 |
| 2014 | 3 |
| 2002 | 1 |