Revision of the Australian Eviphididae (Acari: Mesostigmata)

Zootaxa ◽  
2010 ◽  
Vol 2596 (1) ◽  
pp. 1
Author(s):  
R. B. HALLIDAY
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
The Body ◽  
Dorsal Shield ◽  
Typical Member ◽  
The Third ◽  
Unidentified Species ◽  
Males And Females ◽  
Rich Fauna ◽  
Mite Family

The Australian fauna of the mite family Eviphididae (Acari: Mesostigmata) is revised. A total of 14 species is recorded, 10 of which are described as new: Alliphis halleri (G. & R. Canestrini), A. transversus sp. nov., Evimirus pentagonius Karg, E. scutellatus sp. nov., E. uropodinus (Berlese), Scarabaspis masani sp. nov., S. orientalis (Berlese), S. sternalis sp. nov., S. victoriensis sp. nov., Thinoseius helenae sp. nov., T. jarretti sp. nov., T. papillatus sp. nov., T. peltatus sp. nov., and T. variabilis sp. nov.. These species occur in soil, leaf litter, dung, compost, and seaweed, where they appear to prey on nematodes. A key for identification of these genera and species is provided. Several of the new species have character states that are unusual for their genera. In Alliphis transversus, the first pair of sternal lyrifissures are large, and oriented transversely to the long axis of the body, instead of obliquely, as is normal for the genus. Scarabaspis sternalis is unusual in having the third pair of sternal pores on the sternal shield. It also shows extensive geographic variation in the amount of ornamentation of the dorsal shield. Scarabaspis victoriensis has only one of the setae on coxa I modified into a flat oval-shaped disc instead of both, as is usual for the genus. Scarabaspis masani has normal setiform setae on both coxae I and II, but otherwise appears to be a typical member of the genus. The five species of Thinoseius described here show strong sexual dimorphism, which makes it impossible to associate the males and females of some species. Deutonymphs of an unidentified species of Thinoseius sp. are recorded as phoretic on flies of the genus Thoracochaeta (Sphaeroceridae). The eviphidid fauna of Australia is much smaller than that of Europe. This appears to be the result of the absence of small or monotypic genera, and the fact that Australian native mammals do not produce large quantities of wet dung suitable for the development of a rich fauna of coprophilous mites and dung beetles.

Pseudancistrus sidereus, a new species from southern Venezuela (Siluriformes: Loricariidae) with a redescription of Pseudancistrus

Zootaxa ◽  
2004 ◽  
Vol 628 (1) ◽  
pp. 1 ◽  
Author(s):  
JONATHAN W. ARMBRUSTER
Keyword(s):  
New Species ◽  
Nasal Bone ◽  
The Body ◽  
Caudal Peduncle ◽  
Anterior Process ◽  
Males And Females ◽  
A New Species

Pseudancistrus sidereus is described from two collections of specimens from Amazonas, Venezuela. Pseudancistrus sidereus differs from all other members of Pseudancistrus based on the presence of a unique keel on the caudal peduncle formed from the concave dorsal sections of the plates in the ventral series, light spots on the body (these may be yellow in life) centered on the body plates and the absence of the characteristics of the more derived members of Pseudancistrus such as hypertrophied odontodes along the snout in males and females and the loss of evertibility of the cheek plates. Pseudancistrus includes Lithoxancistrus and Guyanancistrus and is diagnosed by the following synapomorphies: no suture between pterotic-supracleithrum and hyomandibula, no contact of the hyomandibula with the prootic, straight, spoon-shaped anterior process of metapterygoid, nasal bone not much wider than laterosensory canal running through it, sphenotic not contacting posteriormost infraorbital externally, and a short ventral ridge on the pelvic basipterygium (lost in some species). Two species formerly assigned to Guyanancistrus are placed in different genera. Hypostomus guacharote is placed in Lasiancistrus and Chaetostomus trinitatis is placed in Ancistrus.Se describe Pseudancistrus sidereus, con base en dos colectas de espec menes del Amazonas venezolano. Pseudancistrus sidereus difiere de los otros miembros del g nero Pseudancistrus por la presencia de una quilla nica en el ped nculo caudal formada a partir de las secciones c ncavas dorsales de las placas de la serie ventral, puntos blancos en el cuerpo (probablemente amarillos en vida) centrados en las placas corporales y la ausencia de ciertas caracter sticas presentes en los miembros m s derivados de Pseudancistrus, como odontodos hiperatrofiados a lo largo del rostro en machos y hembras y la perdida de evertibilidad de las placas de la mejilla. Pseudancistrus incluye a Lithoxancistrus y Guyanancistrus y se diagnostica por las siguientes sinapomorf as: sutura entre el pter tico-supracleitro y la hiomand bula ausente, hiomand bula y pro tico sin contacto, proceso anterior del metapterigoides recto y en forma de cuchara, hueso nasal apenas m s amplio que el canal laterosensorial que corre a trav s del mismo, esfen tico sin contacto externo

One new species of scorpion belonging to the genus Euscorpiops Vachon, 1980 from Yunan, China (Scorpiones: Euscorpiidae, Scorpiopinae)

Zootaxa ◽  
2010 ◽  
Vol 2399 (1) ◽  
pp. 61 ◽  
Author(s):  
DONG SUN ◽  
MING-SHENG ZHU
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Yunnan Province ◽  
Males And Females ◽  
One New Species ◽  
Ventral Edge ◽  
A New Species

A new species of the genus Euscorpiops Vachon, 1980 is described, based on specimens collected from Menglian County, Yunnan Province, China. It is characterized by the following characters: (1) pectinal teeth number 7–7 in females and 8–8 in males; (2) cheliceral movable finger with 6–7 basal teeth on ventral edge; (3) chela ratio of length to width over 3.5 in females and over 4.1 in males; (4) a slight lobe on movable finger and corresponding notch on fixed finger in both males and females, with no marked sexual dimorphism; (5) patella with 19 external trichobothria (6eb, 2esb, 2em, 4est, 5et), and with 10 ventral trichobothria. With the species described in the present publication, the number of known species of Euscorpiops is raised to 17.

scholarly journals SEXUAL DIMORPHISM IN PSEUDOPUS APODUS (REPTILIA: SAURIA: ANGUIDAE) FROM THE STEPPE CRIMEA

2018 ◽  
Vol 19 ◽  
pp. 1-21
Author(s):  
Oleg V. Kukushkin ◽  
Igor V. Dovgal
Keyword(s):  
Sexual Dimorphism ◽  
Morphometric Parameters ◽  
The Body ◽  
Body Proportions ◽  
Reliable Determination ◽  
Kerch Peninsula ◽  
The Crimea ◽  
Males And Females ◽  
Almost All

The current paper is focused on sexual dimorphism of a giant glass lizard, or sheltopusik, Pseudopus apodus apodus (Pallas, 1775) from its northernmost populations inhabiting the Crimea. In total, 72 P. apodus individuals (45 males and 27 females) were collected at the Kerch Peninsula during 2013–2017. To estimate the variability, 13 morphometric parameters and 18 indices characterizing the head and body proportions were used. It was found that males and females differed significantly by means of almost all parameters, except the body and tail sizes. Besides that, the differences by 10 ratios characterizing head proportions were revealed as well. However, a reliable determination of the lizard sex using linear sizes and/or ratios values seems to be impossible because of the strong overlap of the variability ranges in both sexes. At the same time, the use of the canonical discriminant analysis by the complex of morphometric parameters and by ratios has shown that the males and females in both datasets are classified correctly basing on the sex with an accuracy approximating 100%. The differences in the allometric growth of males and females partially define the sexual dimorphism of P. apodus on head size and shape. A sex-related differences in the development of at least one pair of parameters (head and snout lengths) were clearly evident, since isometry was established for males, while allometry ‒ for females. Moreover, the systems of correlation between the body and head parts differ in both sexes. Thus, male characterisitics correlate significanly, while the female ones were less toughly connected, and some pairs of parameters did not correlate at all.

Three new species of chydorid cladocerans of subfamily Aloninae (Branchipoda: Anomopoda: Chydoridae) from Brazil

Zootaxa ◽  
2010 ◽  
Vol 2390 (1) ◽  
pp. 1 ◽  
Author(s):  
ARTEM Y. SINEV ◽  
LOURDES M. A. ELMOOR-LOUREIRO
Keyword(s):  
New Species ◽  
The Body ◽  
Basal Segment ◽  
The Third ◽  
Australian Species ◽  
True Diversity ◽  
Three New Species ◽  
Head Pores ◽  
Lateral Head ◽  
South Brazil

Three new species of Aloninae cladocera from Central and South Brazil are described. Two of them, Acroperus tupinamba sp. n. and Alona yara sp. n., were previously recorded from the area as European taxa Acroperus harpae (Baird, 1834) and Alona quadrangularis (O.F. Müller, 1776), respectively. Acroperus tupinamba differs from the other species of Acroperus in smaller size, long posterior setae of the valves, shorter and wider postabdomen, short setules near the base of postabdominal claw, long apical spines of antenna, and peculiar morphology of limb IV exopodite. Alona yara differs from A. quadrangularis and A. kolweizii Van Damme & Dumont, 2008 in the number of ventral setules on ventral face of limb I, from A. boliviana Sinev et Coronel, 2006 in the shape of the body and postabdomen, narrow labral keel, and absence of projections on epipodites IV–V. The third new species, Celsinotum candango sp.n. differs from all other species of the genus in proportions of postabdomen. It differs from Australian species (C. hypsophilum Frey, 1991, C parooensis Frey, 1991, and C. platamoides Frey, 1991) in a less developed dorsal keel, lateral head pores located close to midline, longer spine on basal segment of antennal exopodite, and in the presence of extremely large projections on exopodites IV–V. Celsinotum candango differs from Brazilian C. laticaudatum Smirnov & Santos-Silva, 1995 in a shorter spine on basal segment of antenna exopodite, in the shape of postabdomen and in morphology of postabdominal denticles. At present, Aloninae fauna of Brazil includes 35 species, and true diversity is undoubtedly higher, with more new species to be expected in the country.

Pseudotrichonympha sertaneja n.sp. (Protozoa, Mastigophora), from the intestine of a new termite (Rugitermes sp.) collected in Brazil

Parasitology ◽  
1954 ◽  
Vol 44 (1-2) ◽  
pp. 24-29 ◽  
Author(s):  
Col. I. Froilano De Mello
Keyword(s):  
New Species ◽  
Sao Paulo ◽  
The Body ◽  
Basal Part ◽  
Taxonomic Position ◽  
Detailed Account ◽  
Uniform Size ◽  
The Third ◽  
Triangular Area ◽  
A New Species

This paper contains a discussion of the generic and specific characters of Tricho-nympha and Pseudotrichonympha, with a detailed account of the morphology of P. sertaneja n.sp. from a new species of Rugitermes.The basic generic and specific characters of each organelle of Pseudotrichonympha are considered in detail. The genus Pseudotrichonympha has been separated from Trichonympha by the absence of the rostral articulation (citartrosi) and parabasal body. But in at least two species of Pseudotrichonympha a parabasal body has been found, and as Grassi himself believed that citartrosi, however feebly developed, must exist in all Pseudotrichonympha, the taxonomic position of Pseudotrichonympha needs further investigation.The morphology of P. sertaneja n.sp. has the basic generic characters. The specific characters are discontinuous myonemes, oblique instead of longitudinal leiotropic striae, flagella of the first series covering not only the neck but the upper portion of the body, flagella of the second series confined to the basal part of the anterior triangular area of the body, flagella of the third series very short and of uniform size and simple outline of the ectoplasm.The flagellate is regarded as a new species, named P. sertaneja n.sp. The host is a new species of Rugitermes from São Paulo, Brazil.

A new species of Elachistocleis (Anura; Microhylidae) from the Brazilian Amazon

Zootaxa ◽  
2010 ◽  
Vol 2496 (1) ◽  
pp. 63 ◽  
Author(s):  
LUÍS FELIPE TOLEDO
Keyword(s):  
New Species ◽  
Amazon Basin ◽  
Brazilian Amazon ◽  
The Body ◽  
Adult Males ◽  
Males And Females ◽  
A New Species ◽  
Red Coloration

A new species of Elachistocleis (E. magnus) is described from the Amazon basin, in the municipality of Espigão do Oeste, state of Rondônia, Brazil. It differs from all other species of the genus by the combination of the following characters: i) size larger than 31 mm in adult males, ii) grayish ventral coloration, iii) presence of large post-commissural glands, iv) lack of red coloration in the body, and v) grayish dorsum in preserved individuals. There is dimorphism between males and females in size, structures and coloration. Vocalizations and larvae remain unknown.

Four new species and an identification key for Stygodesmodora Blome, 1982 (Nematoda: Spiriniinae) from the continental shelf off northeastern Brazil 

Zootaxa ◽  
2017 ◽  
Vol 4294 (1) ◽  
pp. 46
Author(s):  
ALEXANDRE L. LARRAZÁBAL-FILHO ◽  
PATRÍCIA F. NERES ◽  
ANDRÉ M. ESTEVES
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Continental Shelf ◽  
The Body ◽  
Identification Key ◽  
Northeastern Brazil ◽  
Marine Nematodes ◽  
Undescribed Species ◽  
Potiguar Basin

Four previously undescribed species of marine nematodes were collected on the continental shelf of the Potiguar Basin in northeastern Brazil. Stygodesmodora amphidialis sp. n. has a large fovea amphidialis, long cephalic setae, globular spermatic cells, 6–8 tubular supplements and button-like caudal papillae. Stygodesmodora paramphidialis sp. n. is similar but can be differentiated by the presence of a bipartite lumen and a fovea amphidialis smaller than in S. amphidialis sp. n. Stygodesmodora robusta sp. n. has a relatively robust body, strongly annulated cuticle, one large dorsal tooth and a small ventral tooth, one row of nine ventrally placed precloacal setae, and arched spicules. Stygodesmodora potiguensis sp. n. has the cuticle strongly annulated, many setae along the body, supplements absent, and sexual dimorphism in the size of the fovea amphidialis. These four new species increase to seven the number of taxa known in the genus. 

Morphological variation in a conservative structure: the scapulocoracoids in Sympterygia acuta Garman, 1837 and Sympterygia bonapartii Müller & Henle, 1841 (Chondrichthyes: Rajidae)

Zootaxa ◽  
2017 ◽  
Vol 4318 (1) ◽  
pp. 157 ◽  
Author(s):  
CARLOS D. JURADO ◽  
EZEQUIEL MABRAGAÑA ◽  
JUAN MARTÍN DÍAZ DE ASTARLOA
Keyword(s):  
New Species ◽  
Sexual Dimorphism ◽  
Morphological Variation ◽  
Coastal Waters ◽  
Slight Variation ◽  
Morphometric Variation ◽  
Phylogenetic Studies ◽  
Morphologic Variation ◽  
Broad Variation ◽  
Males And Females

Scapulocoracoid variation in Sympterygia acuta and S. bonapartii was analyzed inter- and intraspecifically, and the utility of this structure as a diagnostic character in skates was evaluated. Skeletal pieces were obtained from a total of 85 specimens collected in coastal waters of northern Argentina in 2011 and 2012. Morphometric variation was analyzed using non parametric tests. Morphologic variation was qualitatively and quantitatively evaluated by comparing number, shape and arrangement of posterior fenestrae. Scapulocoracoids of both species are rectangular in shape and expanded anteroposteriorly, but those of S. bonapartii were more expanded. Differences in shape, both in males and females, were reflected in the ANOSIM test. Greatest Height and Height of Rear Corner were the variables that most contributed to the differences found between both species. These differences in morphology agree with previous descriptions. No sexual dimorphism was observed regarding scapulocoracoids in S. acuta, and only a slight variation between males and females of S. bonapartii was found. Number of postdorsal and postventral fenestrae was highly variable. At least five scapulocoracoid morphotypes for S. acuta (with two to six fenestrae) and seven scapulocoracoid morphotypes for S. bonapartii (with three up to nine fenestrae) were identified. However, patterns of fenestrae arrangement were also very diverse in both species. Therefore, a broad variation in fenestrae number and pattern, especially postdorsal ones, was shown in both species. These results indicate that caution needs to be taken when using the scapulocoracoids not only in phylogenetic studies but also in descriptions of new species. 

A new species of Diomedenema (Nematoda, Rhabditida, Spiruromorpha) from Spheniscus magellanicus (Aves, Sphenisciformes) found on the southern coast of Brazil

2017 ◽  
Vol 92 (4) ◽  
pp. 514-519 ◽  
Author(s):  
M. Knoff ◽  
J.N. Santos ◽  
E.G. Giese ◽  
D.C. Gomes ◽  
Â.T. Silva-Souza
Keyword(s):  
New Species ◽  
Rio Grande ◽  
The State ◽  
Southern Coast ◽  
Rio Grande Do Sul ◽  
First Report ◽  
Spheniscus Magellanicus ◽  
The Third ◽  
Males And Females ◽  
A New Species

AbstractA new species of the genus Diomedenema, a spiruromorph nematode, collected from the lung of Spheniscus magellanicus (Sphenisciformes) found on the southern coast of the state of Rio Grande do Sul, Brazil, is described. The new species is differentiated from the only previously described species of the genus, D. diomedeae Johston & Mawson, 1952, by males possessing a set of caudal papillae with three pairs of precloacal, two pairs of adcloacal and one pair of postcloacal papillae; precloacal papillae with the papillae of the first two pairs being closer to each other than those of the third pair; a longer and pointed tail in males; and females with the vulva at mid-body. This is the first report of a nematode infecting the lung of a sphenisciforme host.

scholarly journals Investigations of Variability of Morphometric Characteristics in Stone Crayfish in Order to Preserve Autochthonous Genome

2020 ◽  
Vol 18 (1-2) ◽  
Author(s):  
Rajko Roljić ◽  
Vera Nikolić ◽  
Nebojša Savić
Keyword(s):  
Sexual Dimorphism ◽  
Carapace Length ◽  
Carapace Width ◽  
Morphological Variability ◽  
The Body ◽  
Morphometric Characteristics ◽  
Baited Traps ◽  
Males And Females ◽  
Austropotamobius Torrentium ◽  
Stone Crayfish

This paper presents the information about morphological variability and sexual dimorphism of the stone crayfish (Austropotamobius torrentium) in the area of Korana River in Mrkonjic Grad. The crayfish were caught by hand made baited traps from October 2018 to May 2019. A total of 46 crayfish were caught, of which 33 males and 13 females. The dimensions of eight morphometric characteristics: body weight (W), body length (TBL), rostrum length (ROL), rostrum width (ROW), claw length (CLL), carapace length (CPL), carapace width (CPW) and abdomen length (ABL), were analyzed, both in males and females. Also, the body condition was determined for all individuales. The measurements results of morphometric characteristics partially matched into the alredy known range of variations. These data presens first ones for the observed area. By using Mann-Whitey U-test, it was noted that there are significant differences between the sexes for W, TBL, CLL, CPL, CPW and ABL. These resuls could be explained by sexual dimorphism of the stone crayfish.

Sign in / Sign up

Export Citation Format

Share Document