Edit Hoplisoma gladysae

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Name

Scientific name

Hoplisoma gladysae

Described by

Authority Calviño & Alonso, Year 2010, Bracketed

Family

Callichthyidae

Common names

Not recorded

Photograph credits

All 3 credited

Summary

Hoplisoma gladysae, long known as Corydoras gladysae, is an armoured catfish known only from two localities in the Río Calchaquí watershed …

Size and aquarium

Maximum size

38mm, standard length

Aquarium size

Minimum length 60 cm, Minimum depth 30 cm

Water

Water conditions

Temperature 8–16°C, pH 7.5–8.5

Hardness

10–20dGH

Conductivity

Not recorded

Behaviour

Temperament

Not recorded

Community suitability

Community-safe

Where it lives

Countries, regions, rivers and lakes

Argentina, Calchaquí, de la Plata, Guachipas, Paraná

Writing

Etymology

Corydoras: from the Ancient Greek κόρυς (korus), meaning 'helmet', and δορά (dora), meaning 'skin, hide of an animal', in allusion to the rows of bony plates o…

Distribution

Currently known only from two localities within the Río Calchaquí watershed in Salta province, northwestern Argentina. The Calchaquí is a tributary within the …

Habitat

The Río Calchaquí rises at almost 6000 m AMSL and flows swiftly through a mountainous valley where it is largely fed by snow melt. The climate is semi-arid and…

Aquarium size

Base dimensi0ns of 60 ∗ 30 cm or larger should be adequate.

Maintenance

Ideally use a substrate of fine sand, although rounded gravel is an acceptable alternative provided that it is kept scrupulously clean. Other décor is largely …

Water conditions

Not written yet

Diet

Corydoras spp. are foraging omnivores, and most will accept sinking dried foods as well as small live and frozen varieties such as chironomid larvae (bloodworm…

Behaviour and compatibility

Not written yet

Sexual dimorphism

Not written yet

Reproduction

Not written yet

Notes

Hoplisoma gladysae is not currently present in the aquarium hobby, and unlikely to be collected for commercial purposes given its natural range and habitat. Th…

Hoplisoma gladysae is not currently present in the aquarium hobby, and unlikely to be collected for commercial purposes given its natural range and habitat.

The species be distinguished from all congeners by the following combination of unique characters: ossified portion of dorsal spine very short, measuring 7.6 - 10.6% SL (mean 9.2%); pectoral-fin spines short, measuring 11.9 - 17.4% SL (mean 14.8%); caudal-fin slightly emarginate.

It also exhibits morphological adaptations to an existence among rocks in a flowing environment, such as a cryptic colour pattern, reduced spine length in the dorsal and pectoral fins, ventrally-oriented pectoral fins, slightly emarginate caudal-fin, and reduced body depth.

Reduced fin spines and body depth are typical features associated with the related genus Aspidoras, but the cranial morphology of H. gladysae is typical of Corydoras with no foramen in the supraoccipital, for example.

The genus Corydoras is included in the family Callichthyidae, of which members are often referred to collectively as 'armoured' or 'mailed' catfishes group due to the presence of bony plates in place of scales on the body.

Their taxonomy can be confusing, and numerous undescribed species are also thought to exist. Fish of unconfirmed identification entering the aquarium hobby are therefore typically assigned a 'C' or 'CW' number for purposes of reference and organisation.

They are facultative air breathers and possess a modified, highly vascularised intestine which has evolved to facilitate uptake of atmospheric oxygen and aid survival in oxygen-deprived environments. In the aquarium you'll occasionally see them rising to the surface to take in gulps of air.

The stiffened pectoral-fin spines are capable of piercing human skin and a 'sting' can be very painful indeed, so care should be exercised when handling them.

It is thought that secretions from the axillary glands at the base of each spine may even be mildly toxic or venomous.

Thanks to Pablo Calviño.

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Where does this come from?

My own experienceFor example, I've kept twelve in a planted 60 cm tank since March 2024.A website I sawFor example, an IUCN Red List assessment, a museum catalogue or a FishBase page.A paperFor example, Marshall et al. (2011), Water temperature differences in interfluvial palm swamp habitats of Paracheirodon axelrodi and P. simulans.A book, or something not onlineFor example, Tappin (2010), Rainbowfishes: their care and keeping in captivity.Something already on the pageFor example, the Behaviour and compatibility section already says this.

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References

1 on this profile

Name

Scientific name

Described by

Family

Common names

Photograph credits

Summary

Size and aquarium

Maximum size

Aquarium size

Water

Water conditions

Hardness

Conductivity

Behaviour

Temperament

Social needs

Community suitability

Where it lives

Countries, regions, rivers and lakes

Writing

Etymology

Distribution

Habitat

Aquarium size

Maintenance

Water conditions

Diet

Behaviour and compatibility

Sexual dimorphism

Reproduction

Notes

References

References