Anoplodactylus pectinus Hedgpeth, 1948

Bravo, Maria Fernanda Montoya, Müller, Hans-Georg, Arango, Claudia P., Tigreros, Paulo & Melzer, Roland R., 2009, Morphology of shallow-water sea spiders from the Colombian Caribbean, add _ journal _ name _ here 32 (1), pp. 9-34 : 24-26

publication ID

https://doi.org/10.5281/zenodo.16850989

DOI

https://doi.org/10.5281/zenodo.16851768

persistent identifier

https://treatment.plazi.org/id/CE051E59-203C-FFD3-1F92-FB9788BDFE50

treatment provided by

Felipe

scientific name

Anoplodactylus pectinus Hedgpeth
status

 

Anoplodactylus pectinus Hedgpeth View in CoL

Anoplodactylus pectinus Hedgpeth, 1948: 234-236 View in CoL , fig. 34.

Material. Adult ♀ (ZSM-A- 20071607); Piedra del ahogado in Playa Cristal (Playa del muerto), Nenguangue, Nationalpark Tayrona, Santa Marta; from stone in coral rubble, 20 m, 13.10.2004.

Description ( Fig. 16 View Fig )

Living animal sand-coloured. Body slender ( Fig. 16A,B View Fig ). Trunk segments 1-3 separated by well visible borders ( Fig. 16B View Fig ). Segments 3 and 4 fused. Lateral projections of thorax smooth, deprived of additional structures ( Fig. 16B View Fig ). Legs thin, become thinner distally ( Fig. 16A,F View Fig ).

Eye tubercle of cylindrical shape, distally flattened. Two lateral sense organs on its distolateral sides. Apical sense organ absent ( Fig. 16E View Fig ). Eye pigmentation the strongest in the upper eye parts. Abdomen 3× as long as eye tubercle, directed upwards. 2 spines close to anus.

Chelifores with 2 articles ( Fig. 16C,D View Fig ). 1 st of these 2× as long as chelae. Both fingers of chelae slender, strongly curved, and equipped with small pointed teeth on inner sides ( Fig. 16D View Fig ). Some spines on outer sides of fingers.

Palps absent as is characteristic of this genus. Ovigera only in males, made of 6 articles.

Lateral projections very slender, of the same length as coxa 1 ( Fig. 16B View Fig ). The latter only slightly longer than wide. Coxa 2 1.5× as long as coxa 1 ( Fig. 16F View Fig ). Ventrodistally with median genital porus in the form of a small thickening. Coxa 3 of same length as coxa 1. Femur 4× as long as coxa 3. Femur more robust than other leg articles, with distal protrusion equipped with long slender spine ( Fig. 16F View Fig ). Tibiae of equal length. As with femur, a distal thin spine is inserted on tibia 1. Similar spine at} of the length of tibia 2. Tarsus as long as wide, with several ventral bristles and small spine ( Fig. 16G View Fig ). Propodus 4× as long as wide. Heel with 2 spines ( Fig. 16G,H View Fig ). Anterior spine comb-shaped and stronger than posterior spine ( Fig. 16H,I View Fig )). Sole made of numerous small, slightly curved spines ( Fig. 16H View Fig ). Main claw not very robust, deprived of accessory claws ( Fig. 16G View Fig ).

Remarks. Anoplodactylus pectinus is a slender species that can be unequivocally determined using the comb-shaped spine on the heel ( Child 1979). It seems closely related to the A. tenuicorpus -complex (Arango & Krapp 2007, Bartolino & Krapp 2007) from the Indo-Pacific. The species in this complex are much more slender and delicate than A. pectinus , do not have a heel and are also characterized by the multiple cup or pore shaped cement glands; A. pectinus has a single cribriform cement gland.

A. pectinus is distributed in the Atlantic Ocean from Mexiko to Panama ( Child 1979) and from Madagascar and Batan Island in the Pacific (Child 1988). The first record from Colombia is that of Müller (1990 & in press), who found it at depths between 1 and 5 m , while the specimen studied here are from 20 m.

Kingdom

Animalia

Phylum

Arthropoda

Class

Pycnogonida

Order

Pantopoda

Family

Phoxichilidiidae

Genus

Anoplodactylus

Loc

Anoplodactylus pectinus Hedgpeth

Bravo, Maria Fernanda Montoya, Müller, Hans-Georg, Arango, Claudia P., Tigreros, Paulo & Melzer, Roland R. 2009
2009
Loc

Anoplodactylus pectinus

Hedgpeth, J. W. 1948: 236
1948
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