New records of Sea Spiders (Arthropoda: Pycnogonida) for continental Portugal and notes on species distribution

Esquete, Patricia; Rubal, Marcos; Veiga, Puri; Troncoso, Jesús S.

doi:10.1186/s41200-016-0025-6

Cited by 3 publications

(3 citation statements)

References 15 publications

(14 reference statements)

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“…The larvae of this species were among the first to be discovered; original descriptions date to the 19th century (Dohrn, ; Hoek, ). Numerous later works detail its embryonic (Dogiel, ; Machner & Scholtz, ; Ungerer & Scholtz, ) and postembryonic development (Behrens, ; Dogiel, ; Schmidt & Bückmann, ; Tomaschko et al, ; Vilpoux & Waloszek, ; Wilhelm, Bückmann, & Tomaschko, ), adult anatomy (Helfer & Schlottke, ; Jarvis & King, , ; Scholtz & Brenneis, ), biochemistry of molting (Bückmann et al, ; Bückmann & Tomaschko, ; Tomaschko, ), systematics (Entrop, ; King & Crapp, ) and biogeography (e.g., Esquete, Rubal, Veiga, & Troncoso, ; Ringvold, Hassel, Bamber, & Buhl‐Mortensen, ).…”

Section: Introductionmentioning

confidence: 99%

The (not very) typical protonymphons of Pycnogonum litorale

Alexeeva

Tamberg

Shunatova

2019

Journal of Morphology

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Sea spiders are unique and poorly known marine chelicerates. Their larvae are even less studied, especially at the ultrastructural level. Here, we examined the hatchlings of Pycnogonum litorale (Strøm, 1,762) using histology, SEM and TEM. Existing classifications place these larvae among "typical" protonymphons, together with Nymphon brevirostre. Our results, however, revealed major differences between the two species. Hatchlings of P. litorale are endotrophic for 1-2 weeks, with yolk deposits in the body wall and a reduced secretory apparatus. They lack a body cavity, demonstrate an unusual modification of the midgut sheath cells and a complex subesophageal ganglion, which includes neuromeres of the prospective walking legs 1. These larvae also possess well-developed glia and complex sensory structures: eyes, V-shaped mechanoreceptive bristles, integrated chemo-and mechanoreceptors, and three types of concealed mechanoreceptors embedded into the body wall and only seen on the sections. In this paper we also propose a new interpretation of the pycnogonid larval types: we present a set of traits useful for diagnosis and a preliminary classification.Finally, we discuss the complexity of glial types in sea spiders and other arthropods.

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Section: Introductionmentioning

confidence: 99%

The (not very) typical protonymphons of Pycnogonum litorale

Alexeeva

Tamberg

Shunatova

2019

Journal of Morphology

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“…This explains why they are a frequent group found in C. officinalis habitats. Other organisms that can be found in higher abundances in this type of habitat include pycnogonids, mites and nematodes [24][25][26][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Seasonal Variations in Invertebrates Sheltered among Corallina officinalis (Plantae, Rodophyta) Turfs along the Southern Istrian Coast (Croatia, Adriatic Sea)

Buršić,

Jaklin,

Arko Pijevac

et al. 2023

Diversity

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Available research on invertebrates in Corallina officinalis settlements shows a high level of biodiversity due to a complex habitat structure. Our aim was to examine seasonal changes in the invertebrate population, considering the algae’s growth patterns. Nine locations with over 90% algal coverage were selected in southern Istria, where quantitative sampling was performed using six replicates of 5 × 5 cm quadrats in each location. Results showed that 29,711 invertebrates were found during winter (maximum algae growth) and 22,292 during summer (minimum algae growth), with an extrapolated average density of 220,000 and 165,200 individuals per square meter, respectively. The total number of individuals showed a linear increase as the algae biomass increased. The highest density, 586,000 individuals, was recorded in the Premantura area during winter. Dominant groups such as amphipods, polychaetes, bivalves and gastropods made up over 80% of the invertebrates. Our study confirms high invertebrate richness in the C. officinalis settlements, with the maximum density being the highest when compared to previously published data.

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“…Se estiman unas 1385 especies de 79 géneros y 11 familias en el nivel mundial (Sabroux et al 2017), otros indican 1 335 especies (de León-Espinosa et al 2021), 1 340 (Esquete et al 2016) y 1 500 (Dietz et al 2018). Una larva protoninfa de picnogónidos es el fósil más antiguo de los quelicerados, con registro en el Devónico y Silúrico (Fahrenbach & Arango, 2007;Kühl et al 2013).…”

Section: Introductionunclassified

Picnogónidos (Arthropoda: Pycnogonida: Pantopoda) de la bahía de Banderas, Pacífico mexicano

Villatoro-Ortiz¹,

Salazar-Silva²

2022

Rev. Cien. Mar. Cost.

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Este estudio reporta la composición de especies de picnogónidos asociados a la fauna incrustante de muelles de una marina turística recolectadas en septiembre y octubre del año 2011, y en abril y junio del año 2012, y las muestras de algas, coral muerto y de tubos de quetopteridos, anélidos tubícolas recolectados mediante buceo libre en sitios de playa de febrero a abril del 2018. Los sitios estudiados, la marina de la Cruz de Huanacaxtle y playas aledañas se localizan en el Pacífico mexicano, en la costa norte de la bahía de Banderas en el estado de Nayarit. Se examinaron en total 78 especímenes que pertenecen a cinco familias, seis géneros y nueve especies; se presenta una lista sistemática; para cada especie se incluye una descripción breve, información de su distribución y abundancia en los sitios estudiados. En los muelles de la marina de la Cruz de Huanacaxtle se registraron 56 especímenes correspondientes a tres especies. En las playas La Manzanilla, Burros, La Lancha y playa de la Isla María Cleofás se presentaron ochos especies, seis de ellas no presentes en los muelles. Las especies más abundantes fueron Anoplodactylus sp. con 32 especímenes (41%) y Nymphon lituus con 24 (31%), esta última fue dominante en los muelles de la marina. El estudio provee los primeros registros de picnogónidos para la costa norte de la bahía de Banderas, México, contribuye al conocimiento de la biodiversidad del Pacífico mexicano y documenta la pycnofauna asociada a comunidades bioincrustantes de una marina náutica.

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New records of Sea Spiders (Arthropoda: Pycnogonida) for continental Portugal and notes on species distribution

Cited by 3 publications

References 15 publications

The (not very) typical protonymphons of Pycnogonum litorale

The (not very) typical protonymphons of Pycnogonum litorale

Seasonal Variations in Invertebrates Sheltered among Corallina officinalis (Plantae, Rodophyta) Turfs along the Southern Istrian Coast (Croatia, Adriatic Sea)

Picnogónidos (Arthropoda: Pycnogonida: Pantopoda) de la bahía de Banderas, Pacífico mexicano

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