scholarly journals A New Species of Helminthosporium Causing Leaf Spot Disease of Sugarcane in Puerto Rico

1969 ◽  
Vol 55 (1) ◽  
pp. 12-22
Author(s):  
Lii-Jang Liu

A previously undescribed species of Helminthosporium was isolated from leaves of P.R. 980 and P.R. 1059 showing lesions resembling those of brown stripe. The conidia of the new Helminthosporium isolate resemble those of H. rostratum but the long, constricted, cylindrical rostrate conidia, characteristic of this fungus, are absent. The conidia of H. holmii, another allied species, also were examined. The conidia of the new species are smaller in diameter than those of H. holmii. In view of the variations in size and shape and the absence of the characteristic rostrate conidia, the new fungus is given the name Helminthosporium portoricensis n. sp. Results of the cultural studies indicated that the newly described species has the same optimum temperature and pH range as that of H. rostratum and H. holmii. This new isolate grew comparatively faster, however, than the other two species on potato dextrose agar. Among the varieties tested, P.R. 1207, P.R. 1028, and P.R. 1048 seemed to be particularly resistant to portoricensis.

Caldasia ◽  
2021 ◽  
Vol 43 (2) ◽  
pp. 221-234 ◽  
Author(s):  
Miguel E. Rodríguez-Posada ◽  
Darwin M. Morales-Martínez ◽  
Héctor E. Ramírez-Chaves ◽  
Daniela Martínez-Medina ◽  
Camilo A. Calderón-Acevedo

The South American bats of the genus Histiotus comprise between four and eight species, but their taxonomy has been controversial and the limits between species and their distribution are not well understood. In Colombia, Histiotus humboldti and H. montanus colombiae have been recorded, but undescribed species has been suggested. We evaluated the species richness and distribution of Colombian Histiotus using morphological, molecular, and acoustic traits. Our results evidence three species in Colombia, the two previously recorded taxa and a new species from the Cordillera Central of Colombia and northern Ecuador that we describe here. We also revalidated H. colombiae as a full species. H. humboldti is widely distributed in the Colombian and Ecuadorean Andes and can be sympatric with the other two species. H. colombiae is restricted to the Colombian Cordillera Oriental. Finally, we highlight the potential hidden diversity within Histiotus in the Peruvian and Bolivian Andes, the need to resolve the evolutionary relationships of the genus, and its implications to the understanding of the processes that have structured the Andean mammal fauna.


1960 ◽  
Vol 50 (4) ◽  
pp. 661-666 ◽  
Author(s):  
K. M. Harris

Investigation of the gall midges of crops in Nigeria has revealed an undescribed: species which causes sorghum stems to lodge and two species, one on rice, the other on benniseed (Sesamum orientale), which are known as pests of these crops in India.


1877 ◽  
Vol 9 (7) ◽  
pp. 129-130 ◽  
Author(s):  
J. A. Lintner

Five years ago, I discovered at Center, in the trunks of poplar trees (Populus tremuloides) several pupal cases of a Cossus, which, by their differing from the other cases known to me, of C. Robiniæ and C. querciperda, I had reason to believe was an undescribed species. This year, on the 14th of June, on examining some infested trees, several pupal cases were discovered projecting half-way from the trunks, and an imago, which had apparently just emerged, and was resting on the stump of a broken limb. The colors of the moth so exactly simulated the surface on which it rested that it was with difficulty observed, even when looking directly at it.


Zootaxa ◽  
2017 ◽  
Vol 4324 (2) ◽  
pp. 285 ◽  
Author(s):  
ALLEN C.G. HEATH ◽  
RICARDO L. PALMA

The tick Ixodes eudyptidis Maskell, 1885 has long been recognised as a parasite of penguins and a number of other seabird hosts and, despite a convoluted taxonomic history, there has been no disagreement as to its validity. The opportunity to examine a larger series of ticks from a wider range of hosts than previously available has led to the finding of a morphologically close and hitherto undescribed species, which is herewith described and named as Ixodes laridis sp.nov. The new species has a superficial similarity to its sibling, I. eudyptidis, but on close examination it displays a number of morphological differences that justify its taxonomic separation. Also, the hosts of the new species are principally gulls, gannets and cormorants, while I. eudyptidis is restricted to penguins. The recognition of this new species has implications for faunal lists in both New Zealand and Australia, as well for seabird health, as it appears that I. eudyptidis does not cause paresis as originally thought, but it is I. laridis that causes potentially fatal paralysis in its hosts.        A taxonomic history and review of I. eudyptidis and keys to all stages of the species of Ixodes recorded from New Zealand, and from Australian seabirds are given. Reference to Ixodes kohlsi Arthur, 1955, a species currently restricted to Australia, is made for comparative purposes because of the similarity of both its morphology and host associations with the other species under consideration. Aspects of the distribution, zoogeography, hosts and ecology of all three species of ticks are discussed. 


2008 ◽  
Vol 53 (3) ◽  
Author(s):  
Fabiana Drago ◽  
Lía Lunaschi

AbstractDuring the course of a study on the endohelminth parasites of birds, specimens of an undescribed species of Tylodelphys Diesing, 1850 (Diplostomidae) were collected from the wood stork, Mycteria americana L., from Formosa Province, Argentina. Tylodelphys brevis sp. nov. can be distinguished from the other Neotropical species of this genus, T. elongata, T. americana and T. adulta, principally by the smaller size of the body (570–851 μm), by the fewer eggs in the uterus (1–2) and by the smaller ratio of body to egg length (6–8). This is the second report of an adult of the genus Tylodelphys from Argentina and the first record of a digenean species parasitizing Mycteria americana in this country.


1960 ◽  
Vol 92 (10) ◽  
pp. 780-786
Author(s):  
C. V. G. Morgan

Since Summers described Bryobia curiosa in 1953 from an unknown host in the Mojave Desert, California, this unusual mite with the stylophore cleft mediodistally has never been reported elsewhere. In 1959, two new, closely related species were discovered: one was found at Summerland, British Columbia, and is described herein; the other was taken in California. I am indebted to Dr. F. M. Summers, University of California, Davis, Calif., for the loan of specimens of B. curiosa and for permitting me to examine specimens of his undescribed species from California.


2021 ◽  
Vol 9 ◽  
Author(s):  
Jun Yuan ◽  
Xiang-Yu Zeng ◽  
Kun Geng ◽  
Nalin Wijayawardene ◽  
Jayarama Bhat ◽  
...  

Thunbergia grandiflora belongs to the family Acanthaceae and is a widely distributed dicotyledonous plant in tropical and subtropical regions. Three isolates of Allophoma (Dothideomycetes, Pleosporales, Didymellaceae) were collected from leaves of T. grandiflora in Guangxi Province, China. Phylogenetic analyses of a combined ITS–LSU–rpb2–tub2 dataset indicate that one of our three strains represents an undescribed species with close affinity to A. minor and the other two strains clustered amongst other isolates of A. pterospermicola. Evidence from morphology and sequence analysis indicates that GUCC 2070.7 is a new species that we introduce here as A. thunbergiae. This is the first report about taxa of Allophoma from this host plant.


Taxonomy ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 60-68
Author(s):  
Jun Souma ◽  
Shûhei Yamamoto ◽  
Yui Takahashi

A total of 14 species in seven tingid genera have been described from the mid-Cretaceous Burmese (Kachin) amber from northern Myanmar, with very distinct paleofauna. Here, a new species of a new genus, Burmavianaida anomalocapitata gen. et sp. nov., is described from Kachin amber. This new species can be readily distinguished from the other described tingid taxa by the apparently smaller body and the structures of the pronotum and hemelytron. Burmavianaida gen. nov. shares the diagnostic characters with two clades composed of three extant subfamilies (Cantacaderinae + Tinginae) and Vianaidinae and may represent an extinct clade distinct from them. To the best of our knowledge, B. anomalocapitata sp. nov. is the smallest species of Tingidae among over 2600 described species. Our new finding supports the hypothesis of the miniaturization phenomenon of insects in Kachin amber, as suggested by previous studies.


Zootaxa ◽  
2011 ◽  
Vol 2804 (1) ◽  
pp. 25 ◽  
Author(s):  
BRYAN L. STUART ◽  
JODI J. L. ROWLEY ◽  
DAO THI ANH TRAN ◽  
DUONG THI THUY LE ◽  
HUY DUC HOANG

We sampled two forms of Leptobrachium in syntopy at the type locality of L. pullum at upper elevations on the Langbian Plateau, southern Vietnam. The two forms differed in morphology (primarily in coloration), mitochondrial DNA, and male advertisement calls. One form closely agrees with the type series of L. pullum (but not to its original description due to error), and the other is described as new. Leptobrachium leucops sp. nov. is distinguished from its congeners by having small body size (males with SVL 38.8–45.2), the upper one-third to one-half of iris white, a blue scleral arc, a dark venter, and sexually active males without spines on the upper lip. Leptobrachium pullum and L. mouhoti, a recently described species from low-elevation slopes of the Langbian Plateau in eastern Cambodia, are morphologically divergent but genetically similar, warranting further investigation into geographic variation in the red-eyed Leptobrachium of southern Indochina.


2012 ◽  
Vol 93 (5) ◽  
pp. 1329-1333
Author(s):  
Débora Lucatelli ◽  
Shane T. Ahyong ◽  
Luis Ernesto Arruda Bezerra ◽  
Paulo Jorge Parreira Dos Santos

A new species of eurysquilloid stomatopod,Eurysquilla petronioisp. nov., is described from the tropical western Atlantic.Eurysquilla petronioisp. nov. is the fourteenth species of the genus to be recognized worldwide, the fifth species from the western Atlantic and the second from Brazilian waters. It is most closely related toE. maiaguesensisfrom Puerto Rico, but differs chiefly in having an unarmed versus apically spinous rostral plate and 6 or 7 rather than 8–10 teeth on dactylus of raptorial claw. A key to the species of the genus is provided.


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