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species

Chicomurex globus R. Houart, C.O. Moe & C. Chen, 2015

kingdom Animalia - animals »  phylum Mollusca - mollusks »  class Gastropoda - gastropods »  order Neogastropoda »  family Muricidae - Muricids »  genus Chicomurex

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Chicomurex globus

Author: Jan Delsing

Chicomurex globus

Author: Jan Delsing

Chicomurex globus

Author: Avon, C.

Chicomurex globus

Author: Houart et al.

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Description

Shell up to 53 mm in length at maturity. Shell globose, broad, lightly built, spinose and nodose. Spire high with conical protoconch of 2.45 whorls and teleoconch of up to 8 broadly convex, weakly shouldered, spinose and nodose whorls. Axial sculpture of teleoconch whorls consisting of high, narrow, nodose ribs on two first teleoconch whorls; other whorls with 3 varices, each varix with short, acute, adapically curved, open, primary and secondary spines. Shoulder spine shortest, narrowest, other primary spines increasing in length and breadth abapically. Other axial sculpture of 2 or 3 intervarical ribs or nodes. Last whorl with 3 varices, usually with a strong and high node followed by a weakly lower one. Spiral sculpture of low, narrow, nodose, primary, secondary and tertiary cords and numerous narrow threads. Spiral sculpture of subsutural ramp of last whorl with adis, IP, abis, followed by P1, s1, P2, s2, P3, s3, P4, s4, P5, s5, P6, s6, and two additional tertiary cords below s6 on convex part of whorl. Varices with short, strongly abaxially and adapically curved spines extending from primary cords and few spinelets from secondary cords. Spines increasing in length abapically, P4, P5, P6 and ADP very strongly curved, webbed, MP slightly straighter and longer, ABP short, narrow, weakly or strongly abapically bent.
Aperture moderately small, roundly ovate. Columellar lip narrow, smooth or covered with small folds or rugae, more obvious abapically; low parietal tooth at adapical extremity; rim partially erect, adherent at adapical extremity. Anal notch shallow, broad. Outer lip erect, crenulated, with weak, elongate denticles within, usually ID split and D1-D6 split. Siphonal canal short, moderately narrow, strongly dorsally recurved at tip, narrowly open.
Creamy white, light tan, tan or chestnut brown, darker coloured below the suture or occasionally on entire subsutural area. Occasionally with two darker coloured spiral bands on P2-s2 and on P6-s6. Other darker spiral band, when present, only obvious on axial varices, covering P3-s3. Tan or brown blotches on axial nodes, on base of varices and on dorsal side of siphonal canal. Shell occasionally entirely white or brown. Aperture glossy white with more or less obvious fine dark brown line along edge of outer apertural lip.
Radula typical for Chicomurex with numerous crowded rows of teeth and a rachidian with large, broad, triangular central cusp, a smaller, broad, triangular lateral denticle and a slightly larger, triangular lateral cusp. Lateral tooth narrow, sickle shaped.
Houart, R. Moe, C. Chen, C. - 2021 - Living species of the genera Chicomurex Arakawa, 1964 and Naquetia Jousseaume, 1880 (Gastropoda Muricidae) in the Indo-West Pacific.
-200m, By tangle nets, Surigao Straits, Mindanao, Philippines, 35.7mm., PARATYPE
Chicomurex globus is a medium sized Chicomurex ranging from Okinawa, Japan to Philippines to Vanuatu and New Caledonia. Named for its rounded outline, it has long been confused with C. gloriosus (Shikama, 1977) [C. gloriosus is the species often referred to s 'C. venustulus' from Philippines and elsewhere, the true C. venustulus (Rehder & Wilson, 1975) is restricted to the Marquesas]. It differs from C. gloriosus by the globous shape resulting from broader shell with shorter siphonal canal, more shouldered and smaller shell; it also has a very distinctive dorsally recurved spine on the siphonal canal. The shell is variable in colouration, from cream to tan to white. Often carry dark blotches, and may be banded like C. gloriosus. Presumably a carnivorous species like other congeners, it inhabits moderate depths around -20~200m. Typical shell length around 40mm., very large specimens may reach 53mm.
Avon C. 2016 . Gastropoda Pacifica.

Interchangeable taxa

Chicomurex globus was misidentified as C. venustulus auct. (= C. gloriosus) by Hinton (1977) Houart (1992, 2008) and by Merle et al (2011). Chicomurex globus differs from C. gloriosus in having a comparatively smaller shell for a same number of teleoconch whorls. It is also comparatively broader and rounder, and the siphonal canal is shorter compared to the more elongate C. gloriosus which further has a much longer siphonal canal and a more strongly shouldered shell. C. globus also has a very strongly dorsally recurved ADP spine on the siphonal canal as opposed to being only weakly recurved in C. gloriosus. The varical spines are also more strongly dorsally recurved in C. globus, in particular the P5 and P6 spines, while being straight or almost straight in C. gloriosus.
The intervarical ribs or nodes of the last teleoconch whorl are generally lower in C. globus and the suture of whorls are less adpressed. The banded form of C. globus has the bands covering P2-s2, P6, s6, and, less obvious, on P3-s3. In C. gloriosus the colour band is broader, generally covering s2-P5, or s2-S5, or P3-s4.
Chicomurex globus was also confused with C. superbus auct. by Kaicher (1973). The shell illustrated as C. superbus by many authors was recently described as C. bad. It differs markedly from C. globus and does not need to be compared here. Chicomurex globus differs from C. venustulus from the Marquesas in having a larger shell relative to the number of teleoconch whorls, in being more globose with a less strongly adpressed suture, a broader aperture and also in having comparatively narrower varices. The position of the coloured spiral bands is also different.
Houart, R. Moe, C. Chen, C. - 2021 - Living species of the genera Chicomurex Arakawa, 1964 and Naquetia Jousseaume, 1880 (Gastropoda Muricidae) in the Indo-West Pacific.

Distribution

Type locality. Davao Bay, Mindanao, off eastern Samar Island, Philippines, by tangle nets, in 200-300 m.
Distribution. Indo-W. Pac. (P). Okinawa, South China Sea, southern Philippines, Guam, Papua New Guinea, Vanuatu and New Caledonia, living in 18-200 m. Chicomurex globus is also known from subfossil beds, off Matupit, near Rabaul, Papua New Guinea.
Houart, R. Moe, C. Chen, C. - 2021 - Living species of the genera Chicomurex Arakawa, 1964 and Naquetia Jousseaume, 1880 (Gastropoda Muricidae) in the Indo-West Pacific.
Author: Jan Delsing

Similar species

Chicomurex gloriosus Shikama, 1977
Chicomurex superbus G. B. Sowerby III, 1889
Chicomurex venustulus Rehder & Wilson, 1975

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