Distribution Of Sense Organs Research Articles

The diversity of the genus Aricidea (Polychaeta: Paraonidae) from the Sea of Marmara, with descriptions of two new species and two new records for the Mediterranean fauna.

This paper reports 13 Aricidea species from the Sea of Marmara. The Aricidea specimens were collected at 98 stations in the region in 2012 and 2013 from soft and hard substrata at depths ranging from 0 to 1200 m. Among the material, two new species, namely Aricidea (Acmira) katzmanni n. sp. and Aricidea (Acmira) pseudoassimilis n. sp., and 11 known species were discovered. Aricidea mirunekoa and A. bulbosa are new records for the Mediterranean fauna; A. (Acmira) annae and A. (Aricidea) wassi are new records for the Sea of Marmara. Aricidea (Acmira) katzmanni n. sp. is characterized by having a long, digitiform antenna; no notopodial papillae on the posterior part of the branchial region; and hook shaped modified neurochaetae with a strong hood and fragile arista. Aricidea (Acmira) pseudoassimilis n. sp. is characterized by having a short, digitiform antenna; interramal lobes between notopodia and neuropodia; hook-shaped modified neurochaeta that gets subterminally thinner with a rounded tip. As A. (Strelzovia) bulbosa has been only previously reported from the Gulf of Suez (Red Sea), it could be a new alien species for the Sea of Marmara and Mediterranean Sea. Based on the characters that have been overlooked so far, the subspecies A. suecica meridionalis and A. capensis bansei were raised to species level, A. meridionalis n. stat. and A. bansei n. stat. The present paper reports the usage of ciliary bands and slits on the prostomium and body, swellings/ridges in the branchial region, and the shape and distribution of sense organs in the taxonomy of Aricidea. All species were described and figured.

SEM Study of Skin Sense Organs in Two <i>Uromastyx</i> Species (Sauria: Agamidae) and <i>Sphenodon punctatus</i> (Rhynchocephalia: Sphenodontidae)

External morphology and distribution of sense organs in the integument of Uromastyx assmussi and U. hardwickii and also of tuatara, Sphenodon punctatus were studied using SEM. Bristless skin organs in both species of Uromastyx and Sphenodon have large diameter (to 160 μm) and are few in the number (0 – 1 per scale) on cephalic and flank body scales. The reduction of sense organ number is discussed with respect of possible significance of this character in agamid system.

SEM Study of Skin Sense Organs in Two Uromastyx Species (Sauria: Agamidae) and Sphenodon punctatus (Rhynchocephalia: Sphenodontidae)

External morphology and distribution of sense organs in the integument of Uromastyx assmussi and U. hardwickii and also of tuatara, Sphenodon punctatus were studied using SEM. Bristless skin organs in both species of Uromastyx and Sphenodon have large diameter (to 160 μm) and are few in the number (0 – 1 per scale) on cephalic and flank body scales. The reduction of sense organ number is discussed with respect of possible significance of this character in agamid system.

Neoarctus primigeniusn. g., n. sp., a new Stygarctidae of the Tyrrhenian Sea (Tardigrada, Arthrotardigrada)

Abstract A new Stygarctidae, Neoarctus primigenius n.g., n.sp. is described. It has been found in the sandy detritus of a rocky bottom covered with green algae at ‐ 38 m depth in the Orosei Gulf off Sardinia (Tyrrhenian Sea). The most important characteristics of this species are the dorsal cuticular elements, the distribution of the cephalic sense organs in both the cephalic and scapular plates and the presence of three pairs of clavae. Taking into account the cuticular plates, the number and distribution of the sense organs, and the claw morphology, the affinities of this species with Oreellidae, Neostygarctidae and Renaudarctidae are here discussed.

Scanning Electron Microscopy of the Palp Sense Organs of the Harvestman Leiobunum townsendi (Arachnida: Opiliones)

Scanning Electron Microscopy of the Palp Sense Organs of the Harvestman Leiobunum townsendi (Arachnida: Opiliones)

Distribution of sense organs on male antennae of small ermine moths, Yponomeuta spp. (Lepidoptera : Yponomeutidae)

To investigate whether differences exist among the sensory equipment of the antennae of eight Yponomeuta species, the sensory structures on the tenth antennal segments were studied by scanning electron microscopy. Scales were removed by sonification, and two-dimensional reconstructions of the segmental surfaces were made. The same types of sensilla trichodea, sensilla chaetica (types I and II), sensilla coeloconica, and sensilla styloconica occurred in every species. Number and distribution of sensilla chaetica, sensilla coeloconica and sensilla styloconica were not significantly different among the eight species. Statistical analysis of the number and distribution of sensilla trichodea divided the eight species into four separate clusters. This division largely corresponds with host plant preferences.