An unusually sculptured new species of Phreatodrobia Hershler & Longley (Mollusca: Caenogastropoda: Cochliopidae) from central Texas

Zootaxa ◽  
2020 ◽  
Vol 4810 (1) ◽  
pp. 143-152
Author(s):  
DOMINIQUE ALVEAR ◽  
PETER H. DIAZ ◽  
J. RANDY GIBSON ◽  
MARY JONES ◽  
KATHRYN E. PEREZ
Keyword(s):  
New Species ◽  
Hyporheic Zone ◽  
Large Range ◽  
The Body ◽  
Molecular Evidence ◽  
Aquifer System ◽  
Trinity Aquifer ◽  
Central Texas ◽  
Body Whorl

There are eight described species in Phreatodrobia, minute, phreatic (subterranean aquatic) snails, all stygobitic and endemic to the Edwards-Trinity Aquifer System of Texas. Two species were described from river drift (Pilsbry & Ferriss 1906) and the others more recently by sampling the water flowing from wells or springs (Hershler & Longley 1986b; Hershler & Longley 1987). Recent sampling from spring orifices and the hyporheic zone of streams have extended the known ranges of the phreatic snails of the region and encountered unknown snails (Alvear et al. 2020). Here we describe Phreatodrobia spica n. sp., a rarely encountered species with a large range of about 400 km (Figure 1). We find P. spica in samples with a diverse assemblage of phreatic animals including other species of Phreatodrobia, isopods, amphipods, coleopterans, and mites. Phreatodrobia spica is distinguished from congeners using morphological and molecular evidence and is characterized by an elevated, trochiform shell with unique sculpture that include spikes and pustules. It has an open umbilicus and a complete, reflected lip that is sometimes appressed to the body whorl. 

scholarly journals Four new species of troglomorphic Coecobrya Yosii, 1956 (Collembola, Entomobryidae) from Thailand based on morphological and molecular evidence, with an updated key of Thai troglomorphic species

2021 ◽  
Vol 41 ◽  
pp. 1-42
Author(s):  
Areeruk Nilsai ◽  
Matsapume Detcharoen ◽  
Nerivania Nunes Godeiro ◽  
Sopark Jantarit
Keyword(s):  
New Species ◽  
Large Body ◽  
Nuclear Gene ◽  
The Body ◽  
Valid Species ◽  
Species Discrimination ◽  
Molecular Evidence ◽  
Orange Pigment ◽  
Unique Character ◽  
Dichotomous Key

Four new species of troglomorphic Coecobrya Yosii, 1956 are described from caves located in the central and northeastern regions of Thailand. Coecobrya whittenisp. nov. and C. troglobiasp. nov. are from Khon Kaen province, C. ellisisp. nov. is from Phetchabun province and C. phitsanulokensissp. nov. is from Phitsanulok province. They all exhibit remarkable troglobitic characters i.e. elongated antennae, legs and furca, slender claw complex and large body size. Coecobrya whittenisp. nov. is similar to C. troglobiasp. nov. and they were found a distance of only 3.4 km from each other. However, they are mainly different in the number of An mac on dorsal head and number of chaetae of Th. II. Likewise, C. ellisisp. nov. is similar to C. phitsanulokensissp. nov.. However, they differ in the number of An mac on the dorsal head, the number of central mac on Abd. II, central mac on Abd. IV, lateral mac on Abd. IV and the number of inner teeth of the claw. Moreover, C. ellisisp. nov. has orange pigment dots on the body, a unique character, considering that all other troglomorphic Coecobrya species in Thailand are devoid of pigmentation. The results of the molecular approach based on two partial mitochondrial markers (COI and 16S rDNA) and a nuclear gene fragment (28S rDNA) supported the results of morphological species discrimination in separating the four nominal populations as valid species. An updated dichotomous key of Thai troglomorphic Coecobrya species is also given.

Taxonomic revision of Aegla lata Bond-Buckup & Buckup, 1994 (Decapoda: Anomura: Aeglidae), with the description of a new species of Aegla Leach, 1820 from the Upper Paraná Ecoregion, Brazil

2020 ◽  
Vol 40 (4) ◽  
pp. 425-434
Author(s):  
Ingrid C Marçal ◽  
Fernanda P Páez ◽  
Lenice Souza-Shibatta ◽  
Silvia H Sofia ◽  
Gustavo M Teixeira
Keyword(s):  
New Species ◽  
River Basin ◽  
Taxonomic Revision ◽  
Morphological Characters ◽  
The Body ◽  
Type Locality ◽  
Morphological Data ◽  
Molecular Evidence ◽  
Coi Mtdna ◽  
A New Species

Abstract Aegla lata Bond-Buckup & Buckup, 1994 is considered extinct in the type locality. New populations of this species, however, have been found in northern Paraná state, Brazil. We revised the taxonomy of A. lata based on morphological data obtained from the type material and specimens recently obtained from streams of the Tibagi River sub-basin, Paranapanema River basin, Upper Paraná Ecoregion. Moreover, Aegla jacutingan. sp. is described and illustrated. The new species resembles A. lata in the shapes of the body and chelipeds. Both species are nevertheless separated by particular morphological characters of the carapace, chelipeds, and epimeron as well as by molecular (COI mtDNA) differences. Both species can be distinguished from their congeners based on morphological and molecular evidence.

scholarly journals Two new stygobiotic species of Horatia Bourguignat, 1887 (Hydrobiidae) from Croatia

2021 ◽  
Vol 37 ◽  
pp. 89-104
Author(s):  
Andrzej Falniowski ◽  
Jozef Grego ◽  
Aleksandra Rysiewska ◽  
Artur Osikowski ◽  
Sebastian Hofman
Keyword(s):  
New Species ◽  
Soft Part ◽  
The Body ◽  
Freshwater Snails ◽  
Terminal Part ◽  
Cave Sediments ◽  
Two New Species ◽  
Body Whorl

In this paper we describe two new species of the freshwater snails of genus Horatia. A new stygobiotic species of Horatia Bourguignat, 1887 is described from Izvor Beguša in Croatia. It occurs in sympatry with the crenobiotic H. klecakiana Bourguignat, 1887, but is morphologically and molecularly distinct. It is characterized by the terminal part of the body whorl separated from the columella, and neither eyes nor any pigment on the soft parts. It is a stygobiont gastropod, known so far only from one living specimen and several empty shells, thus its soft part morphology and anatomy remain unknown. Another new species of stygobiotic Horatia was found inside the cave Mali Rumin, its description is based solely on numerous empty shells from the cave sediments.

scholarly journals Delineation of two new, highly similar species of Taiwanese Cylindera tiger beetles (Coleoptera, Carabidae, Cicindelinae) based on morphological and molecular evidence

ZooKeys ◽  
2019 ◽  
Vol 875 ◽  
pp. 31-62
Author(s):  
Ming-Hsun Chou ◽  
Wen-Bin Yeh
Keyword(s):  
New Species ◽  
Morphological Characteristics ◽  
Taxonomic Status ◽  
The Body ◽  
Molecular Dating ◽  
Molecular Evidence ◽  
Similar Species ◽  
Species Classification ◽  
Tiger Beetles ◽  
Two New Species

Tiger beetles have been recognized primarily based on morphological characters. However, the variations of elytral maculation and coloration sometimes lead to misjudgment in species classification and the overlooking of the existence of cryptic species. Recently, specimens of two endemic species of Taiwanese Cylindera, C. sauteri and C. pseudocylindriformis, exhibit morphologically recognizable forms, indicating that some undescribed species may exist. To clarify their taxonomic status, morphological characteristics including male genitalia were examined and two mitochondrial genes, COI and 16S rDNA, and one nuclear 28S rDNA were analyzed. Molecular phylogenetic inferences indicated that both forms in both species are reciprocally monophyletic. Moreover, molecular dating showed the forms diverged approximately 1.3 million years ago. Two new species, Cylindera ooasp. nov. and Cylindera autumnalissp. nov., are thereby described. The main recognizable characteristics separating C. ooasp. nov. from C. sauteri are the lack of a triangular spot at the middle edge of elytron and the elongated but not rounded subapical spot. For C. autumnalissp. nov., the apical lunula near the elytral suture is thickened but not linear and slender, and its elytra are more metallic brownish than those of C. pseudocylindriformis. Although their aedeagi characteristics are not distinctive, the body size of the proposed two new species is different. Field observation revealed that niche utilization would be relevant for differentiating these closely related species.

Morphological and molecular evidence reveal a new species of the earthworm genus Pontodrilus Perrier, 1874 (Clitellata, Megascolecidae) from Thailand and Peninsular Malaysia

Zootaxa ◽  
2018 ◽  
Vol 4496 (1) ◽  
pp. 218 ◽  
Author(s):  
TEERAPONG SEESAMUT ◽  
CHIRASAK SUTCHARIT ◽  
PARIN JIRAPATRASILP ◽  
RATMANEE CHANABUN ◽  
SOMSAK PANHA
Keyword(s):  
New Species ◽  
Peninsular Malaysia ◽  
The Body ◽  
Molecular Evidence ◽  
Key To Species ◽  
Cytochrome Oxidase Subunit ◽  
Mitochondrial Cytochrome Oxidase Subunit ◽  
Number Of Segments ◽  
Mitochondrial Cytochrome Oxidase ◽  
A New Species

A new species of the megascolecid earthworm genus Pontodrilus Perrier, 1874, Pontodrilus longissimus sp. n., is described from seashores of Thailand and Peninsular Malaysia. The new species differs from congeners, especially the cosmopolitan P. litoralis (Grube, 1855) in the size of the body, number of segments and the shape of the spermathecae. P. litoralis is redescribed, based on specimens collected from the same region and the same type of habitat. DNA fragments of the mitochondrial cytochrome oxidase subunit I of both species were sequenced. Morphological as well as DNA sequence-based comparisons confirm that P. longissimus sp. n. is a lineage distinct from P. litoralis and in fact a new species. The illustrated descriptions are accompanied by a key to species of Pontodrilus. 

A new species of jumping pitviper of the genus Atropoides (Serpentes: Viperidae: Crotalinae) from the Sierra de Botaderos and the Sierra La Muralla, Honduras

Zootaxa ◽  
2008 ◽  
Vol 1948 (1) ◽  
pp. 57-68 ◽  
Author(s):  
ERIC N. SMITH ◽  
JORGE A. FERRARI-CASTRO
Keyword(s):  
New Species ◽  
Gene Sequence ◽  
Sequence Data ◽  
Mitochondrial Gene ◽  
Sequence Divergence ◽  
Morphological Characters ◽  
The Body ◽  
Molecular Evidence ◽  
A New Species ◽  
Gene Sequence Data

We describe a new species of pitviper of the genus Atropoides from the Sierra de Botaderos and La Muralla, Honduras. The new species is easily distinguished from all other members of the genus, except A. picadoi from Costa Rica and Panama, by possessing more ventral scales (140 vs. 103–138). This new species differs from A. picadoi in being relatively small, less than 600 mm in total length (vs. reaching > 750 mm), having the posterior third of the body venter heavily melanized (vs. more than 50%), less than 50% of the underside of the tail melanized, and the postorbital stripe covering more than 50% of only one or two scales from the first temporal row and covering completely only the last scale of the row, at most (vs. 3–4 more than 50% melanized and the last two scales in the row usually completely melanized). In addition to morphological characters, molecular evidence also differentiates this new species from the other species of Atropoides (as recognized by Castoe et al. 2005). Using mitochondrial gene sequence data, they found the new species described herein to represent the sister species of A. occiduus, with 5.7 % sequence divergence separating these two taxa.

Sign in / Sign up

Export Citation Format

Share Document