Description of a new and two known species of Cephaloboides Rahm, 1928 (Nematoda: Rhabditidae) from India, with discussion on the taxonomy of the genus

Zootaxa ◽  
2017 ◽  
Vol 4277 (3) ◽  
pp. 352
Author(s):  
QUDSIA TAHSEEN ◽  
ATHER HUSSAIN ◽  
SHIKHA AHLAWAT ◽  
MALKA MUSTAQIM ◽  
ZAKAULLAH KHAN
Keyword(s):  
New Species ◽  
Sex Ratio ◽  
B Value ◽  
A New Species ◽  
Emended Diagnosis

A new species of Rhabditidae, collected from manure, is described and illustrated. Cephaloboides anisospiculus sp. n., an amphimictic species with a 1:1 sex ratio, is characterized by a small to medium-sized body (female: L = 0.5–0.7 mm, a = 13.6–20.0, b = 2.7–3.6, c = 15.4–22.7, c’ = 1.0–1.8, V = 51.2–60.9), finely striated, punctated cuticle; slightly raised labial papillae; stoma with slightly anisomorphic metastegostom; presence of epiptygma; eggs measuring 37–42 x 20–24 µm; slightly protruded vulval lips with cuticular flaps; rectum 16–19 µm long; males with small, stout, slightly arcuate spicules with hood-like capitula and genital papillae in 1/2/(1+3)+2+P configuration; bursa leptoderan, greatly reduced and not enveloping the caudal spike. C. curvicaudatus (Schneider, 1866) Zullini, 1982 is also redescribed, with an emended diagnosis. The present population of C. curvicaudatus shows a few minor differences viz., relatively smaller ‘b’ value, presence of elongate capitula of spicules and strong copulatory muscle bands. Another species, C. parapapillosus (Schuurmans Stekhoven, 1951) comb. n. has been reinstated. 

A new species of Strouhaloniscellus Tabacaru, 1993 (Crustacea: Isopoda: Oniscidea) from a cave in Mt Biokovo, Croatia

Zootaxa ◽  
2009 ◽  
Vol 2196 (1) ◽  
pp. 59-64 ◽  
Author(s):  
JANA BEDEK ◽  
STEFANO TAITI
Keyword(s):  
New Species ◽  
Distal Part ◽  
Medial Margin ◽  
A New Species ◽  
Emended Diagnosis

A new species of Strouhaloniscellus (S. biokovoensis) (Trichoniscidae, Haplophthalminae) is described and illustrated from specimens collected at the bottom of a vertical cave in Mt Biokovo, Croatia. The new species is characterised by its small size (2.8 mm long), unpigmented body, absence of eyes, cephalon with three rows of tubercles, pereion with an oblique ridge on the epimera and 2+2 large tubercles on pereionites 1–6 and 1+1 on pereionite 7, pleon narrow with no dorsal ornamentation, male pereiopod 7 with a stout apically rounded seta on carpus, and male pleopod 1 exopod with a quadrangular distal part bent outwards and a rounded lobe on medial margin. Strouhaloniscellus biokovoensis n. sp. represents the second known species of the genus Strouhaloniscellus. The differences with S. anophthalmus (Strouhal) are discussed and an emended diagnosis of the genus Strouhaloniscellus is given.

scholarly journals A revision of the Monodelphis glirina group (Didelphidae: Marmosini), with a description of a new species from Roraima, Brazil

2019 ◽  
Vol 100 (1) ◽  
pp. 103-117 ◽  
Author(s):  
Silvia E Pavan
Keyword(s):  
New Species ◽  
South America ◽  
Geographic Variation ◽  
Dna Sequences ◽  
Morphological Characters ◽  
Monophyletic Group ◽  
Formal Description ◽  
Group Information ◽  
A New Species ◽  
Emended Diagnosis

Abstract Short-tailed opossums of the nominotypical subgenus Monodelphis occur throughout most of the cis-Andean lowlands of tropical South America. Among its member species, a monophyletic group that includes M. glirina (Amazonian red-sided opossum), M. sanctaerosae (Santa Rosa short-tailed opossum), and an unnamed taxon, herein referred to as the Monodelphis glirina group, is the focus of this paper. I provide an emended diagnosis for species of the group, information about geographic variation in M. glirina (including M. maraxina [Marajó short-tailed opossum]), and a formal description for the unnamed taxon mentioned above. The new species, known from two savanna localities in northeastern Roraima, is geographically disjunct from its closer relatives, M. glirina and M. sanctaerosae, only known to occur south of the Amazon. The new species differs from other congeneric taxa by a set of morphological characters and by DNA sequences. Cuícas-de-cauda-curta do subgênero nominotípico Monodelphis ocorrem na maior parte das planícies cis-Andinas da América do Sul tropical. Dentre as espécies membro, o grupo monofilético que inclui M. glirina, M. sanctarosae, e um táxon ainda não descrito, referido como grupo Monodelphis glirina, é o foco do presente estudo. Aqui são fornecidas diagnoses emendadas para as espécies do grupo, informações sobre variação geográfica em M. glirina (incluindo M. maraxina), e descrição formal para o novo táxon mencionado acima. A nova espécie, conhecida de duas localidades de savana no nordeste de Roraima, encontra-se geograficamente disjunta das espécies mais proximamente relacionadas, M. glirina e M. sanctaerosae, somente conhecidas para a porção sul da Amazônia. A nova espécie difere das demais espécies congenéricas por um conjunto de características morfológicas e por sequências de DNA.

Sex Ratio in a New Species of Nasonia with Fully-Winged Males

Evolution ◽  
1991 ◽  
Vol 45 (1) ◽  
pp. 225 ◽  
Author(s):  
B. H. King ◽  
S. W. Skinner
Keyword(s):  
New Species ◽  
Sex Ratio ◽  
A New Species

A new species ofParacomesoma(Comesomatidae) from Maldives (Indian Ocean) with an emended diagnosis and an updated key of the genus

2014 ◽  
Vol 95 (2) ◽  
pp. 339-347 ◽  
Author(s):  
Federica Semprucci
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Valid Species ◽  
Back Reef ◽  
Body Diameter ◽  
A New Species ◽  
Emended Diagnosis

A new species from the subfamily Comesomatinae is described from the back-reef platforms of the central part of the Maldivian archipelago.Paracomesoma susannaesp. nov. is characterized by a large-sized body, very long cephalic sensilla (72–91 µm long), lateral differentiation of punctuations, and, in the males, 19–22 minute precloacal supplements, relatively short spicules (2.3–2.9 anal body diameter) and a hook-like structure in the distal end of the gubernaculum.Paracomesoma susannaesp. nov. is the only species so far described of the genus which appears to have such a low ratio of the outer labial and cephalic sensilla (about 0.02). An emended diagnosis ofP. paralongispiculumis proposed, along with an updated and modified key to all the valid species of the genusParacomesoma.

First record of spiral fovea amphidialis in Acantholaimus (Chromadoridae: Nematoda), with a description of a new species from shallow sediments of the South Atlantic and an emended diagnosis of the genus

Zootaxa ◽  
2017 ◽  
Vol 4258 (3) ◽  
pp. 257
Author(s):  
ALEX MANOEL ◽  
MARIA CRISTINA DA SILVA ◽  
ANDRÉ M. ESTEVES
Keyword(s):  
New Species ◽  
Continental Shelf ◽  
Buccal Cavity ◽  
First Record ◽  
South Atlantic ◽  
Northeast Brazil ◽  
The South ◽  
Potiguar Basin ◽  
A New Species ◽  
Emended Diagnosis

A new species of the genus Acantholaimus is described from the South Atlantic, in the Potiguar Basin off the continental shelf of northeast Brazil. Acantholaimus marliae sp. n. is characterized by the long body; numerous somatic setae arranged in four sublateral longitudinal rows; buccal cavity with five solid teeth (four subventral and one dorsal), with the largest tooth dorsally located and the most protuberant between the subventral teeth shaped similarly to a "bottle opener"; and spiral fovea amphidialis. Acantholaimus marliae sp. n. is the only species described for the genus that has a spiral fovea amphidialis. This is the fifth species of Acantholaimus described from shallow water. An emended diagnosis of the genus is provided. 

scholarly journals Diplacodes lefebvrii in Sardinia, a new species for the Italian fauna (Odonata: Libellulidae)

2014 ◽  
Vol 46 (1-2) ◽  
pp. 121 ◽  
Author(s):  
Andrea Rattu ◽  
Piero Leo ◽  
Raynald Moratin ◽  
Sönke Hardersen
Keyword(s):  
New Species ◽  
Indian Ocean ◽  
Sex Ratio ◽  
Iberian Peninsula ◽  
First Record ◽  
The South ◽  
Single Male ◽  
The Indian Ocean ◽  
Small Wetland ◽  
A New Species

<em>Diplacodes lefebvrii</em> (Rambur, 1842) is a libellulid dragonfly, which is common and widespread in Africa and across the Indian Ocean. While this species is fairly common in the south and east of the Mediterranean, its European range is confined to Cyprus, the island of Rhodes and the south of the Iberian Peninsula. Here we report the first record of <em>D. lefebvrii </em>for Italy, which was captured near Cagliari (Sardinia) on 11.IX.2013. In October 2014, a population of the same species was observed at a small wetland on the island “Isola di San Pietro” (Sardinia). Here the observed sex ratio of <em>D. lefebvrii</em> was strongly biased in favour of females and only a single male was observed.

A new species of Cephalanticoma (Enoplida: Anticomidae) from Brazilian coast (Atlantic Ocean), with emended diagnosis and dichotomous key to the genus

Zootaxa ◽  
2020 ◽  
Vol 4731 (3) ◽  
pp. 359-370
Author(s):  
ALEX MANOEL ◽  
ANDRÉ M. ESTEVES ◽  
TATIANA F. MARIA
Keyword(s):  
New Species ◽  
Atlantic Ocean ◽  
Head Capsule ◽  
Brazilian Coast ◽  
Northeast Brazil ◽  
Key To Species ◽  
Dichotomous Key ◽  
Potiguar Basin ◽  
A New Species ◽  
Emended Diagnosis

A new species of the genus Cephalanticoma is described for the Atlantic Ocean in the Potiguar Basin off the continental shelf of northeast Brazil. Cephalanticoma rugatusa sp. n. is characterized by bearing head capsule ending on the level of amphideal fovea, a tubular precloacal supplement and two rows of thin precloacal setae. Cephalanticoma rugatusa sp. n. differs from all other species of the genus by having a precloacal cuticular papilla in front of the cloaca and a cuticular transversal wrinkle which extends from the papilla elevation to the conical-cylindrical portion of the tail occupying both subventral regions. An emended diagnosis and a dichotomous key to species based on both genders are provided. 

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