Taxonomic notes, a new species, and a key to Indian species of the click beetle genus Cryptalaus Ȏhira, 1967 (Coleoptera: Elateridae: Agrypninae)

Cryptalaus alveolatus sp. nov. is described and illustrated from India. The species has unique morphological characters: conspicuous longitudinal median ridge on pronotum, elytral interstria II more depressed than interstriae I and III. The Indian fauna of the genus Cryptalaus Ȏhira, 1967 is updated and represented by seven species: C. alveolatus sp. nov., C. assamensis (Schwarz, 1902) comb. nov., C. eryx (Candèze, 1874), C. lynceus (Candèze, 1874), C. nodulosus (Waterhouse, 1877) comb. nov., C. sculptus (Westwood, 1848) and C. sordidus (Westwood, 1848). Genitalia and terminalia of male and female C. sordidus are also illustrated. A key to the Indian species of Cryptalaus is given.

A new species of Trimma (Pisces: Gobiidae) from western Thailand, north-eastern Indian Ocean

A new species of Trimma is described from the islands just off the Thailand coast near Phuket. Trimma ukkriti n.sp. lacks scales on the cheek and opercle, but has ctenoid scales in the midline of the nape, has an elongate second spine of the first dorsal fin which reaches posteriorly to between the base of the spine and the base of the 4th ray of the second dorsal fin when adpressed, 19–20 pectoral-fin rays with 6–13 branched rays in the middle of the fin, an unbranched 5th pelvic-fin ray, which is 48–67% the length of the 4th ray, a U-shaped interorbital trench with no fleshy median ridge, a poorly developed postorbital trench ending at the 5th papilla in row p (which has 6 papillae in total), and row c beneath the eye consists of 6 papillae. When live and freshly collected, the species is very similar in appearance to T. okinawae and T. readerae, with orange to red spots on the head and body.

A New Species of Vietnamella Tshernova 1972 (Ephemeroptera: Vietnamellidae) from Thailand

The larva, male subimago, female imago, and eggs of V. nanensis sp. n. are described based on specimens from Mae Hong Son and Nan provinces, Thailand. The female subimago is described based on a photograph of a specimen reared to the imago stage. The species previously was distinguished only by DNA barcode data and designated as Vietnamella sp. C. Based on morphology, the larva of the new species can be distinguished with the following combination of characteristics: (i) pattern of serration on the ventral margin of the forefemur, (ii) posterolateral margins of abdominal terga with pairs of acute tubercles, especially terga VI and VII, (iii) a well-developed pair of median ridge projections on tergum X, (iv) the second segment of the maxillary palp being about 1.3× the length of the third segment, and (v) females containing eggs with prominent protuberances on the chorionic surface. A key to larvae of all known species in the genus is provided.

New Neoribates (Acari, Oribatida, Parakalummidae) from Vietnam

Three new species of oribatid mites of the genus Neoribates (Oribatida, Parakalummidae) are described based on adult specimens from the Tam Dao National Park of Northern Vietnam. Neoribates pseudojacoti sp. nov. differs from Neoribates jacoti Balogh & Mahunka, 1967 by the presence of clavate bothridial setae, median ridge of rostrum and adanal setae of medium size, and the localization of lamellar setae on prodorsum laterally to lamellar ends. Neoribates striatissimus sp. nov. differs from Neoribates similis Fujikawa, 2007 by the striate body surface, minute rostral setae and five pairs of genital setae. Neoribates protrusus sp. nov. differs from Neoribates rotundus Aoki, 1982 by the presence of barbed bothridial setae, rudimentary parts of translamellar line and very long interlamellar setae with attenuate tips.

A new Tolypelepidid (Agnatha, Heterostraci) from the Late Silurian of Poland

Tolypelepis mielnikensis n.sp. from a core sample of the Late Silurian (Pridoli) succession in Mielnik, Poland shares tolypelepidid features such as a subdivision of the dorsal shield into epitega, and ornamentation of short dentine ridges grouped into scale-like units with a coarser, higher median ridge encircled by narrower and lower ridges. A constriction of the dorsal shield anterior to the orbit level with the orbital notches significantly deeper than in other tolypelepidids discriminates it from otherTolypelepisspecies.

Internal features of larvae belonging to two species of Pseudopaludicola (Anura: Leiuperinae)

We described the buccal cavity, chondrocranium, and cranial muscles in tadpoles of two species of Pseudopaludicola: P. boliviana (P. pusilla species group) and P. falcipes. The two species share states of only three relevant and informative characters: (1) absence of m. levator mandibularis lateralis, (2) absence of m. levator mandibularis externus superficialis at advanced premetamorphic stages, and (3) presence of long lateral arena papillae of both the roof and floor of the buccal cavity. The larvae of P. falcipes is diagnosed by (states of P. boliviana between parentheses): (1) three lingual papillae (four), (2) one-two pairs of short and blunt infralabial papillae (single pair of multifid papillae), (3) low median ridge (tall), (4) distal connection between pars corpora and pars alaris of the cartilago suprarostralis present (absent), and (5) m. subarcualis rectus II-IV inserted at ceratobranchiale I (ceratobranchiale II insertion). The combination of a processus pseudopterygoideus together with proximal and distal connections on the cartilago suprarostralis occurs in most species of Pleurodema as well. Absence of m. levator mandibularis lateralis is also known for Physalaemus fernandezae and absence of m. levator mandibularis externus superficialis at advanced stages of development (Stage 39 onward) is shared with Edalorhina perezi and Pleurodema diplolister.

A new Notacanthurus Tshernova, 1974 and a new Rhithrogena Eaton, 1881 (subgenus Tumungula Zhou & Peters, 2004) from Thailand (Heptageniidae, Ephemeroptera)

Notacanthurus baei sp. n. (larva) and Rhithrogena (Tumungula) siamensis sp. n. (male, female and assumed larva) are described from northern Thailand. Diagnoses and line drawings of key characters are provided. Larvae of Southeast Asian Notacanthurus n.sp. resemble those of Palearctic Notacanthurus spp. in having a median ridge of spines directed posteriorly on terga, a similar patterning of terga with oblique stripes sloping inward, femoral cross bands and caudal filaments with whorls of small spines. Contrastingly, larvae of the new species bear claws with denticles, while the mature male larva exhibits prospective penis with distally paired portions of rounded lobes like those in most Electrogena Zurwerra and Tomka, 1984. Imagines of R. (T.) siamensis represent a second species of subgen. Tumungula Zhou and Peters, 2004. Males have balloon-shaped hypertrophied foreclaws, with first tarsal segment about 1.4x the length of the second, and divergent penis lobes without titillators. In contrast to R. (T.) unica the male styliger plate shows two sharp, inside directed projections, submedian lobes of the penis have circular gonopores lacking subapical spines.